WO2010090011A1 - 歯科用充填修復キット - Google Patents
歯科用充填修復キット Download PDFInfo
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- WO2010090011A1 WO2010090011A1 PCT/JP2010/000650 JP2010000650W WO2010090011A1 WO 2010090011 A1 WO2010090011 A1 WO 2010090011A1 JP 2010000650 W JP2010000650 W JP 2010000650W WO 2010090011 A1 WO2010090011 A1 WO 2010090011A1
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- Prior art keywords
- filling
- group
- adhesive
- polymerizable monomer
- amine compound
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- A61K6/889—Polycarboxylate cements; Glass ionomer cements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/30—Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
Definitions
- the present invention relates to a photopolymerizable filling / restoring material and a dental filling / restoring kit comprising an adhesive between a tooth and a filling restorative material, which is used after being hardened before filling with the filling restorative material.
- this adhesive material is mainly composed of a polymerizable monomer and a polymerization initiator, but it has an adhesive property to teeth as a part of the polymerizable monomer. By blending excellent ones, the adhesion to the teeth is enhanced. It is known that a monomer containing an acidic group is particularly suitable as a polymerizable monomer having excellent adhesion to teeth. Thus, an adhesive containing such an acidic group-containing polymerizable monomer as a polymerizable monomer further has a tooth decalcification capability by further containing water. The mass is excellent in penetration into the tooth.
- the adhesive is usually a complicated pretreatment for improving the adhesion, that is, a demineralization treatment with an acid aqueous solution, or a polymerizable monomer excellent in affinity to the tooth. Osmosis treatment can also be omitted, which is very advantageous.
- a photoinitiator is advantageously used as the polymerization initiator because of its short curing time and operability, and in particular, visible light that is harmless to the living body. Those that function by light are preferably adopted.
- a visible light polymerization initiator ⁇ -diketone compounds such as camphorquinone and phosphorus compounds such as acylphosphine oxide are often used. Of these, ⁇ -diketone compounds are combined with an amine compound, Since the curing rate is further increased and the curing depth is further deepened, it is very useful as a photopolymerization initiator for filling restoration materials.
- the photo-curing of the filling / restoring material is more preferable as it can be cured by light irradiation for a shorter time because the burden on the patient can be reduced.
- a photoacid generator such as an aryliodonium salt or a triazine compound is used in combination (Patent Document 1 and 2).
- amine compounds are also highly active in aromatic amine compounds.
- the curing activity is greatly improved by using not only the aromatic amine but also an aliphatic amine in combination.
- polymerization and curing can be performed in a very short time even when a weak light source is used (Patent Document 3).
- JP-A-63-273602 JP 2005-89729 A Japanese Patent Laying-Open No. 2005-213231
- a quaternary system combining an ⁇ -diketone compound, an aliphatic amine compound, an aromatic amine compound, and a photoacid generator as a photopolymerization initiator has a very high curing activity and a deep curing depth.
- the filling restorative material contained the acidic group-containing polymerizable monomer of the tooth. Even when cured on the cured surface of the adhesive material to be cured, it has been found that sufficient adhesive strength to the teeth is not obtained by light irradiation for a short time. This is considered to be largely related to the surface unpolymerized layer present on the surface of the cured layer of the adhesive, which is a substrate for curing the filling and restorative material.
- the photopolymerization initiator contains an aliphatic amine compound and an aromatic amine compound as constituents.
- the aliphatic amine compound forms a salt with an acid, the effect of improving the catalytic activity is almost lost. Therefore, the curable composition to which this photopolymerization initiator is applied has reduced catalytic activity at the contact interface on the substrate containing an acid content, and the curing reaction is suppressed.
- an acidic group is present in the cured layer of the adhesive, which is a substrate on which the filling / restoring material is cured, derived from the acidic group-containing polymerizable monomer component. However, since this acidic group is fixed to the polymer, its reactivity is weak.
- a surface unpolymerized layer containing an unreacted acidic group-containing radical polymerizable monomer exists on the surface of the actual adhesive layer. That is, since the adhesive applied to the teeth is naturally cured while being released to the atmosphere, the polymerization reaction on the surface is inhibited by oxygen molecules in the air, and the surface unpolymerized layer is formed.
- the acidic group-containing radical polymerizable monomer contained in this surface unpolymerized layer has less influence than the acidic group-containing radical polymerizable monomer due to less calcium ions generated by decalcification, and the acidity decreases. However, the acidic group-containing radical polymerizable monomer remains unreacted.
- the surface of the cured layer of the adhesive is in a state of high reactivity with the aliphatic amine compound, so that the filling restoration material to which the above-described photopolymerization initiator is applied can be filled and cured. It is assumed that sufficient adhesive strength cannot be obtained for the teeth.
- the aliphatic amine compound blended in the photopolymerization initiator of the filling restoration material is an acidic group-containing radical polymerizable monomer contained in the unpolymerized layer on the surface of the cured material layer of the adhesive. It can be considered that a salt is formed with the group, which does not contribute to the improvement of the polymerization activity and causes poor curing.
- the photopolymerization initiator also contains an aromatic amine compound, and the aromatic amine compound is also included in the unpolymerized layer on the surface of the cured material layer of the adhesive at the contact interface. It is considered to form a salt with the acidic group of the functional monomer.
- the aliphatic amine compound is strongly basic, whereas the aromatic amine compound is weakly basic.
- the formation of the salt of the weakly basic aromatic amine compound with the acidic group is reversible and weak, and in the photopolymerization reaction, the reactivity of the excited photopolymerization initiator and the amine compound is high, And since it is an irreversible reaction, neutralization with the acidic group of this aromatic amine compound has little influence on the polymerization activity of this photoinitiator.
- the present invention aims to solve such problems, and specifically includes ⁇ -diketone compounds, aliphatic amine compounds, aromatic amine compounds, and photoacids.
- a filling restorative material containing a quaternary photopolymerization initiator combined with a generator even if it is filled and cured on a cured layer of a dental adhesive containing an acidic group-containing radical polymerizable monomer, the contact It is an object to cure sufficiently to the interface so that high adhesive strength can be stably obtained.
- the present inventors have conducted intensive studies, and as a result, ⁇ -diketone compounds, aliphatic amines, which are filled on a hardened layer of a dental adhesive containing an acidic group-containing polymerizable monomer. It has been found that the above-mentioned problems can be solved by further adding a basic inorganic material to the filling restoration material in which the compound, the aromatic amine compound, and the photoacid generator are combined, and the present invention has been completed. It was.
- the dental filling / restoration kit of the present invention comprises (A) (I) an acidic group-free polymerizable monomer, (II) a basic inorganic material, and (III) i) an ⁇ -diketone compound, ii) A filling restoration material comprising a photopolymerization initiator comprising at least an aliphatic amine compound, iii) an aromatic amine compound, and iv) a photoacid generator; and (B) (I) an acidic group-containing polymerizable monomer.
- It comprises a polymerizable monomer containing a monomer, and (II) a polymerization initiator, and an adhesive between a tooth and a filling restorative material, which is used after being cured before filling the filling restorative material.
- one embodiment of the dental filling / restoration kit of the present invention is the (A) filling / restoring material, wherein (II) the basic inorganic material is (I) 100 parts by mass of the acidic group-free polymerizable monomer. On the other hand, it is preferable to contain at least 3 parts by mass.
- another embodiment of the dental filling / restoration kit of the present invention is the (A) filling / restoring material, wherein (III) ii) an aliphatic amine compound and (A) (III) iii) an aromatic amine compound are: Both are preferably tertiary amines.
- the filling restorative material (II) the basic inorganic material is preferably fluoroaluminosilicate glass.
- the adhesive further comprises (III) water.
- a polymerizable monomer containing an acidic group-containing polymerizable monomer has phosphoric acid as an acidic group. It is preferable that it has a system acidic group.
- the (A) filling / restoration material preferably includes (IV) a filling material.
- the dental filling / restoration kit comprises the (A) filling / restoring material and the (B) adhesive.
- the filling / restoration kit of the present invention since the filling / restoring material is blended with a basic inorganic material, the contact / restoration surface of the filling / restoring material filled on the cured layer of the adhesive material has a surface unpolymerized layer. Even if an acidic group-containing polymerizable monomer is present, the basic inorganic material competes or preferentially neutralizes the acidic group. As a result, the neutralization of the aliphatic amine compound of the photopolymerization initiator contained in the filling / restoring material is greatly reduced, and the filling / restoring material has sufficient polymerization activity up to the contact interface with the cured layer of the adhesive. To harden. Thereby, even if it is light irradiation for a very short time, it becomes a dental filling restoration kit which can implement
- the basic inorganic material is contained in at least 3 parts by mass with respect to 100 parts by mass of the non-acidic group-containing polymerizable monomer (I).
- the basic inorganic material can sufficiently neutralize the acid content contained in the surface unpolymerized layer of the adhesive, and further enhance the adhesion of the filling restoration material to the teeth. be able to.
- the filling / restoring material (III) ii) the aliphatic amine compound and (A) (III) iii) the aromatic amine compound are both tertiary amines.
- the polymerization activity of the photopolymerization initiator contained in the filling / restoring material can be particularly increased.
- the basic inorganic material is fluoroaluminosilicate glass, whereby the filling and repairing kit of the present invention neutralizes acidic groups present in the cured layer of the adhesive.
- the filling and repairing kit of the present invention neutralizes acidic groups present in the cured layer of the adhesive.
- polyvalent metal ions eluted from fluoroaluminosilicate glass.
- the neutralized acidic group meets the polyvalent metal ions to form ionic crosslinks, which can further improve the strength of the contact interface between the cured layer of the adhesive and the filling restorative material. it can.
- the adhesive material further contains (III) water, so that in the filling / restoration kit of the present invention, the adhesive material has a function of decalcifying the tooth and the affinity polymerizable monomer to the tooth structure. A penetrating function can also be imparted, and a high adhesion effect to the tooth can be realized in a mode with excellent operability without these pretreatments.
- the dental filling / restoration kit according to this embodiment is roughly classified to include a filling / restoring material and an adhesive as constituent members.
- filling restoration materials include (I) non-acidic group-containing polymerizable monomer, (II) basic inorganic material, (III) i) ⁇ -diketone compound, ii) aliphatic amine compound, iii) aromatic An amine compound, and iv) a photopolymerization initiator in which at least a photoacid generator is combined, and (IV) a filler.
- filling restoration materials include (I) non-acidic group-containing polymerizable monomer, (II) basic inorganic material, (III) i) ⁇ -diketone compound, ii) aliphatic amine compound, iii) aromatic An amine compound, and iv) a photopolymerization initiator in which at least a photoacid generator is combined, and (IV) a filler.
- the acidic group-free polymerizable monomer to be contained in the filling / restoring material is a polymerizable monomer, Those having no acidic group in the molecule can be used without any limitation.
- the acidic group means a functional group such as a phosphinico group, a phosphono group, a sulfo group, or a carboxyl group that has a pKa of less than 5 and can dissociate active protons.
- a (meth) acrylate monomer is mainly used because of its good polymerizability.
- Specific examples of the (meth) acrylate monomer include the following (1) to (4).
- R 1 is a hydrogen atom or a methyl group.
- R 2 or R 3 in each of the above formulas is an independent alkylene group.
- R 4 in each of the above formulas is an alkyl group.
- M in the above formulas is 0 or an integer of 1 to 10
- n is an integer of 1 to 10 (where m + n is an integer of 2 to 10).
- bifunctional polymerizable monomer examples include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, butylene glycol di ( (Meth) acrylate, neopentyl glycol di (meth) acrylate, propylene glycol di (meth) acrylate, 1,3-butanediol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexane Diol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, 1,10-decanediol di (meth) acrylate, 2,2-bis ((meth) acryloxyphenyl) propane, 2,2- Bis [4- (3- (meth) acryloxy) -2- Roxypropoxyphenyl] propane, 2,2-bis (4- ((meth) acryloxyphenyl
- Trifunctional polymerizable monomer examples include trimethylolpropane tri (meth) acrylate, trimethylolethane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, and trimethylol. And methane tri (meth) acrylate.
- Tetrafunctional polymerizable monomer examples include pentaerythritol tetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, and pentaerythritol hexa (meth) acrylate. It is done.
- bifunctional or higher radical polymerizable monomers are preferred from the viewpoint of mechanical strength.
- the above polymerizable monomers may be used singly or in combination of two or more. Furthermore, you may combine multiple types from which a functional group number differs.
- (A) (II) Basic inorganic material In the dental filling / restoration kit of this embodiment, the basic inorganic material contained in the filling / restoring material improves the strength of the filling / restoring material by the filler effect, and at the time of polymerization. In the contact interface between the adhesive and the hardened layer, the effect of maintaining a high degree of polymerization activity of the photopolymerization initiator described later is exhibited.
- phosphoric acid was dropped into a solution in which distilled water and ethanol were mixed at a volume ratio of 1: 1 in a beaker having a bottom area of 706.5 mm 2 in the inner space and adjusted to pH 2.50 ⁇ 0.03 at 23 ° C.
- 1.0 g of a basic inorganic material was added to 20 g of the acidic solution, and the pH immediately after stirring for 2 minutes at 23 ° C. and 200 rpm using a stirrer having a diameter of 8 mm and a length of 20 mm
- the pH difference value is higher by 0.05 or more, more preferably by 0.1 or more, compared with that not included.
- the preferable upper limit of the pH difference value is 4.5, and the particularly preferable upper limit is 2.0. It is.
- the pH measurement method may be measured by immersing a pH meter in a stirring solution using a glass electrode using a potassium chloride solution.
- the filling / restoring material includes “(A) (I) an acidic group-free polymerizable monomer, (II) a basic inorganic material, (III) i) an ⁇ -diketone compound, ii A) a fatty amine compound, iii) an aromatic amine compound, and iv) a photopolymerization initiator comprising at least a photoacid generator in combination, and (IV) a filling restorative material comprising a filler ”
- A (I) an acidic group-free polymerizable monomer
- II a basic inorganic material
- III i) an ⁇ -diketone compound
- ii A) a fatty amine compound, iii) an aromatic amine compound and iv) a photopolymerization initiator comprising at least a photoacid generator in combination
- a filling restorative material comprising a filler
- Non-acidic group-containing polymerizable monomer (II, IV) basic inorganic material (the basic inorganic material also functions as a filler), (III) i) ⁇ -diketone compound, ii) It comprises a photopolymerization initiator comprising at least an aliphatic amine compound, iii) an aromatic amine compound, and iv) a photoacid generator.
- ⁇ Second filling restoration material (I) non-acidic group-containing polymerizable monomer, (II) basic inorganic material, (III) i) ⁇ -diketone compound, ii) aliphatic amine compound, iii) aromatic amine compound, and iv) photoacid
- the generating agent and (IV) a filler (the filler is a filler excluding a basic inorganic material).
- the proportion of the basic inorganic material and the basic inorganic material in the mixed filler component of the filler is preferably 0.03% by mass or more and 70% by mass or less, and 1.0% by mass or more. 50 mass% or less is more preferable.
- the inorganic compound that can be used as the basic inorganic material is not particularly limited as long as the above-described conditions are satisfied.
- the group I, II, III oxide or hydroxide, fluoride, carbonate, silicate or It can be selected from a mixture or complex salt thereof.
- typical basic inorganic materials include alumina, calcia, magnesia and the like as oxides.
- the hydroxide include hydroxides such as calcium hydroxide, magnesium hydroxide, and strontium hydroxide.
- the fluoride include sodium fluoride and calcium fluoride.
- Examples of the carbonate include Examples thereof include calcium carbonate, magnesium carbonate, and strontium carbonate.
- the silicate include calcium silicate, aluminum silicate, fluoroaluminosilicate glass, and other silicate glasses. Among these, metal ion-eluting basic inorganic materials such as calcium ions and aluminum ions can be preferably used.
- a divalent or higher valent metal ion-eluting inorganic material is more preferable, and a trivalent or higher valent metal ion-eluting basic inorganic material is particularly preferable.
- a trivalent or higher polyvalent metal ion-eluting basic inorganic material is particularly preferable.
- the trivalent or higher polyvalent metal ion-eluting basic inorganic materials it is most preferable to use fluoroaluminosilicate glass.
- the metal ion-eluting basic inorganic material such as the fluoroaluminosilicate glass has an acidic group-containing polymerizable monomer present in the surface unpolymerized layer when the filling / restoring material is applied onto the cured layer of the adhesive.
- Metal ions are eluted by the action of water (water in the oral cavity and the residue from the drying process such as air blow when water is contained in the adhesive), reducing neutralization of aliphatic amine compounds. Demonstrate the effect.
- aluminum ions and other polyvalent metal ions that are added to the composition as necessary elute from the fluoroaluminosilicate glass are polymerized by the acidic group-containing polymerizable monomer at the contact layer and the cured layer of the adhesive. It is particularly preferable because the adhesiveness to the tooth can be further improved by ionic crosslinking with the product.
- fluoroaluminosilicate glass As the above-mentioned fluoroaluminosilicate glass which can be suitably used, a known one used for dental cement, for example, glass ionomer cement can be used.
- the composition of commonly known fluoroaluminosilicate glasses is, in terms of ionic mass percent, silicon, 10-33; aluminum, 4-30; alkaline earth metal, 5-36; alkali metal, 0-10; 2 to 16; fluorine, 2 to 40 and residual oxygen are preferably used. More preferred compositional ranges include silicon, 15 to 25; aluminum, 7 to 20; alkaline earth metal, 8 to 28; alkali metal, 0 to 10; phosphorus, 0.5 to 8; fluorine, 4 to 40 and Remaining oxygen.
- the alkali metal is most commonly sodium, but it is also preferable to replace part or all of it with lithium, potassium or the like. Furthermore, if necessary, a part of the above aluminum can be replaced with yttrium, zirconium, hafnium, tantalum, lanthanum or the like.
- the amount of polyvalent metal ions eluted when 0.1 g of the fluoroaluminosilicate glass was immersed in 10 ml of a 10 wt% aqueous maleic acid solution at a temperature of 23 ° C. for 24 hours was inductively coupled plasma (ICP) emission.
- the “24-hour elution ion amount” measured by spectroscopic analysis or atomic absorption analysis is 5.0 to 500 meq / g-glass, more preferably 10 to 100 meq / g-glass, and particularly preferably 15 to 50 meq / g. -Glass is preferred.
- the fluoroaluminosilicate glass having such “24-hour elution ion amount” exhibits a good basicity, and it is easy to produce a filling restoration material using this glass.
- the shape of the basic inorganic material that can be used in the dental filling / restoration kit of the present invention is not particularly limited, and may be pulverized particles such as those obtained by normal pulverization, or spherical particles, and if necessary, a plate shape, It is also possible to mix particles such as fibers.
- the basic inorganic material preferably has an average particle diameter of 0.01 ⁇ m to 20 ⁇ m, more preferably from the viewpoint of making the neutralization reaction with the above-mentioned acidic group-containing monomer more rapid and not deteriorating operability. Is most preferably in the range of 0.05 ⁇ m to 15 ⁇ m, more preferably 0.1 ⁇ m to 5 ⁇ m.
- the specific surface area is preferably within the range of 5 to 100 m 2 / g (value obtained by measuring the amount of nitrogen adsorbed on the particle surface by the BET method). More preferably within the range of ⁇ 60 m 2 / g.
- the above-mentioned basic inorganic material is treated with a surface treatment agent typified by a silane coupling agent, so that the affinity with the monomer, the dispersibility in the monomer, the mechanical strength and water resistance of the cured product are increased. Can be improved.
- a surface treatment agent and a surface treatment method are not particularly limited, and a known method can be employed without limitation.
- Silane coupling agents used for surface treatment of basic inorganic materials include methyltrimethoxysilane, methyltriethoxysilane, methyltrichlorosilane, dimethyldichlorosilane, trimethylchlorosilane, vinyltrichlorosilane, vinyltriethoxysilane, vinyltris ( ⁇ -Methoxyethoxy) silane, ⁇ -methacryloyloxypropyltrimethoxysilane, ⁇ -chloropropyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, hexamethyldisilazane and the like are preferably used.
- the surface treatment of the basic inorganic material can be performed.
- the blending amount of the basic inorganic material is not particularly limited, but is usually 3 parts by mass or more with respect to 100 parts by mass of the acidic group-free polymerizable monomer.
- the amount of the basic inorganic material is at this value, the reactivity with the acidic group-containing polymerizable monomer is preferably increased at the contact interface with the cured layer of the adhesive.
- the particularly preferred blending amount of the basic inorganic material is 5 to 80 parts by mass, and most preferably 10 to 30 parts by mass with respect to 100 parts by mass of the acidic group-free polymerizable monomer.
- (A) (III) Photopolymerization initiator The filling restorative material constituting the dental filling / restoration kit of the present embodiment is such that the photopolymerization initiator is i) ⁇ -diketone compound, ii) aliphatic amine compound, iii) aroma A group amine compound, and iv) a photoacid generator.
- ⁇ -diketone compound examples include diacetyl, 2,3-pentadione, 2,3-hexadione, benzyl, 4,4′-dimethoxybenzyl, 4,4′-diethoxybenzyl, 4,4 '-Oxybenzyl, 4,4'-dichlorobenzyl, 4-nitrobenzyl, ⁇ -naphthyl, ⁇ -naphthyl, camphorquinone, camphorquinonesulfonic acid ester, camphorquinonecarboxylic acid ester, 1,2-cyclohexanedione, etc.
- ⁇ -diketones are preferable from the viewpoint of stability, and among the ⁇ -diketones, diacetyl, benzyl or camphorquinone is particularly preferable.
- the blending amount of ⁇ -diketone is not particularly limited.
- the amount of ⁇ -diketone is usually not more than 0.1 parts per 100 parts by mass of the acidic group-free polymerizable monomer because of high polymerization activity.
- a range of 01 to 5 parts by mass is preferable, and a range of 0.1 to 3 parts by mass is more preferable.
- Aliphatic amine compound In the dental filling / restoration kit of the present embodiment, the aliphatic amine compound has all the organic groups bonded to the nitrogen atom as an aliphatic group (however, it may have a substituent). It is a compound which is.
- the compound is preferably a highly basic aliphatic amine having a pKa of 25 or more, preferably 7.5 or more, of the corresponding ammonium salt in 25 ° C. water.
- the aliphatic group bonded to the nitrogen atom in the aliphatic amine compound include linear or branched groups such as a methyl group, an ethyl group, a propyl group, an n-butyl group, and an i-butyl group. And an alkenyl group such as an ethenyl group (vinyl group) or an allyl group.
- the substituent bonded to the aliphatic group include an aryl group such as a phenyl group, and a hydroxyl group (the substituted aliphatic group includes a 2-hydroxyethyl group, a 2-hydroxypropyl group, a 2-hydroxybutyl group).
- Halogen atoms such as fluorine atom, chlorine atom and bromine atom; acyloxy group having 1 to 3 carbon atoms such as acetyloxy group, acryloyloxy group and methacryloyloxy group; methoxy Group, an ethoxy group, a propyloxy group and the like, an alkoxyl group having 1 to 3 carbon atoms; a carbonyl group, a carbonyloxy group, a cyano group, and the like.
- aliphatic amine compounds include aliphatic primary amine compounds such as 2-ethylhexylamine, n-butylamine, n-hexylamine and n-octylamine, diethylamine, dibutylamine, diallylamine, diisopropyl Aliphatic secondary amine compounds such as amine, di-2-ethylhexylamine, di-n-octylamine and the like can be mentioned. From the viewpoint of high catalytic activity, aliphatic tertiary amine compounds are preferred.
- aliphatic tertiary amine compound examples include triethylamine, tributylamine, triallylamine, N, N-dimethylaminoethyl methacrylate, N, N-diethylaminoethyl methacrylate, N-methyldiethanolamine, N-ethyldiethanolamine, N -Propyldiethanolamine, N-ethyldiallylamine, N-ethyldibenzylamine, dimethylethanolamine, diethylethanolamine, dipropylethanolamine, triethanolamine, tri (isopropanol) amine, tri (2-hydroxybutyl) amine, tribendi And ruamine.
- These aliphatic amine compounds may be used as a mixture of two or more.
- N, N-dimethylaminoethyl methacrylate, N, N-diethylaminoethyl are used because of their excellent chemical stability and solubility in monomers.
- the amount of the aliphatic amine compound is too small, the effect of improving the polymerization activity of the photopolymerization initiator may not be sufficient. It is preferable to add in the range of 0.0005 to 25 parts by mass.
- aliphatic amine compounds are highly basic, discoloration tends to occur in the cured product when blended in a large amount. Therefore, from the viewpoint of making a filling and restorative material with a high degree of suppression of such discoloration and excellent aesthetics, Is preferably kept as low as possible.
- the particularly preferred blending amount of the aliphatic amine compound is 0.05 to 5 parts by mass, more preferably 0.1 to 3 parts by mass with respect to 100 parts by mass of the acidic group-free polymerizable monomer. Part.
- the contact interface with the cured adhesive layer is obtained due to the effect of the above-mentioned (II) basic inorganic material.
- sufficient polymerization activity can be exhibited, it is possible to achieve both high adhesive strength and the color tone of the cured layer of the adhesive.
- the aromatic amine compound may be an amine compound in which at least one of the organic groups bonded to the nitrogen atom is an aromatic group. Things can be used without any particular restrictions.
- the compound is preferably an aromatic amine having a pKa of 6 or less in the 25 ° C. water of the corresponding ammonium salt.
- aromatic amine compounds include aromatic primary amine compounds such as aniline and toluidine, and aromatic secondary amine compounds such as N-methylaniline and N-methyl-p-toluidine.
- aromatic tertiary amine compounds are preferred because of their high polymerization activity.
- a typical aromatic tertiary amine compound is a compound in which at least one aromatic group and at most two aliphatic groups are bonded to the nitrogen atom of the amino group. Particularly preferred are those represented by the following general formula from the viewpoint of higher polymerization activity.
- R 5 and R 6 are each independently an alkyl group
- R 7 is an alkyl group, an aryl group, an alkenyl group, an alkoxy group, a cyano group, a carbonyl group, an aminocarbonyl group, or an alkyloxycarbonyl group.
- Etc. N represents an integer of 0 to 5.
- n is 2 or more, the plurality of R 7 may be the same as or different from each other. Further, R 7 may be bonded to each other to form a ring.
- the alkyl group in R 5 , R 6 and R 7 is preferably a linear or branched one having 1 to 6 carbon atoms, for example, a methyl group, an ethyl group, an n-propyl group, an i-propyl group. , N-butyl group, n-hexyl group and the like.
- the alkyl group may be a substituted alkyl group having a substituent. Examples of such a substituted alkyl group include halogen-substituted alkyl groups such as a fluoromethyl group and 2-fluoroethyl group, or 2-hydroxy group. Examples thereof include a hydroxyl group-substituted alkyl group such as an ethyl group.
- any of the aryl group, alkenyl group, alkoxy group, cyano group, carbonyl group, aminocarbonyl group, alkyloxycarbonyl group, and the like in R 7 may have a substituent.
- the aryl group include those having 6 to 12 carbon atoms such as a phenyl group, a p-methoxyphenyl group, a p-methylthiophenyl group, a p-chlorophenyl group, and a 4-biphenyl group.
- Examples of the alkenyl group include those having 2 to 12 carbon atoms such as a vinyl group, a propenyl group, and a 2-phenylethenyl group.
- Examples of the alkoxy group include those having 1 to 10 carbon atoms such as a methoxy group, an ethoxy group, and a butoxy group.
- Examples of the carbonyl group include a formyl group, an acetyl group, a propionyl group, a benzoyl group, and the like.
- Examples thereof include aminocarbonyl group, methylaminocarbonyl group, dimethylaminocarbonyl group and the like, and alkyloxycarbonyl group such as methoxycarbonyl group, ethoxycarbonyl group, butoxycarbonyl group, aminooxycarbonyl group, isoamyloxycarbonyl group and the like.
- Examples thereof include those having 1 to 10 carbon atoms in the base moiety.
- R 5 and R 6 are preferably alkyl groups having 1 to 6 carbon atoms, particularly unsubstituted alkyl groups having 1 to 3 carbon atoms.
- methyl group, ethyl group, n-propyl group or 2-hydroxyethyl group is more preferable. Of these, a methyl group is more preferred.
- the bonding position of R 7 is preferably para, and R 7 is preferably an alkyl group or an alkyloxycarbonyl group, and most preferably an alkyloxycarbonyl group.
- aromatic tertiary amine compound represented by the above general formula examples include compounds in which R 7 is an alkyloxycarbonyl group bonded to the para-position, such as methyl p-dimethylaminobenzoate, p-dimethylaminobenzoate.
- R 7 is an alkyloxycarbonyl group bonded to the para-position
- examples include ethyl acetate, propyl p-dimethylaminobenzoate, amyl p-dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, ethyl p-diethylaminobenzoate, propyl p-diethylaminobenzoate and the like.
- aromatic amine compounds include N, N-dimethylaniline, N, N-dibenzylaniline, N, N-dimethyl-p-toluidine, N, N-diethyl-p-toluidine, N, N-di ( ⁇ -hydroxyethyl) -p-toluidine, N, N, 2,4,6-pentamethylaniline, N, N, 2,4-tetramethylaniline, N, N-diethyl-2,4,6 -Trimethylaniline, N, N-dimethylacetophenone, N, N-dimethylcyanobenzene, p-dimethylaminobenzoic acid, p-dimethylaminobenzoic acid amide and the like.
- ethyl p-dimethylaminobenzoate or N, N-dimethyl-p-toluidine is particularly preferred, and ethyl p-dimethylaminobenzoate is most preferred.
- aromatic amine compounds may be used as a mixture of two or more.
- the blending amount of the aromatic amine compound is too small, the effect of improving the polymerization activity of the photopolymerization initiator may not be sufficient.
- the blending amount is too large, it may be compared with the aliphatic amine compound.
- the amount of the aromatic amine compound is preferably 0.05 to 5 parts by mass with respect to 100 parts by mass of the acidic group-free polymerizable monomer. More preferably, it is 0.1 to 3 parts by mass.
- photoacid generator known ones can be used without limitation. Specific examples include aryliodonium salts, halomethyl group-substituted s-triazine derivatives, sulfonium salt compounds, pyridinium salt compounds, and the like. Can be mentioned. Among these photoacid generators, aryliodonium salts and halomethyl group-substituted s-triazine derivatives can be suitably used because of their high polymerization initiation ability. Especially, since sunlight stability is favorable, it is more preferable to use an aryl iodonium salt.
- diaryliodonium salt compounds examples include diphenyliodonium, bis (p-chlorophenyl) iodonium, ditolyliodonium, bis (p-tert-butylphenyl) iodonium, bis (m-nitrophenyl) iodonium, p-tert-butylphenyl.
- Chlorides such as phenyliodonium, methoxyphenylphenyliodonium, p-octyloxyphenylphenyliodonium, 4-isopropylphenyl-4-methylphenyliodonium, bromides, tetrafluoroborate, hexafluorophosphate, hexafluoroarsenate, hexafluoroantimonate , Tetrakis (pentafluorophenyl) borate, trifluoromethanesulfonate, etc.
- Tetrafluoroborate hexafluorophosphate, hexafluoroarsenate, hexafluoroantimonate, trifluoromethane sulfonate, tetrakis (pentafluorophenyl) borate salts are preferably used.
- halomethyl group-substituted s-triazine derivatives include 2,4,6-tris (trichloromethyl) -s-triazine, 2,4,6-tris (tribromomethyl) -s-triazine, 2-methyl-4 , 6-Bis (trichloromethyl) -s-triazine, 2-methyl-4,6-bis (tribromomethyl) -s-triazine, 2-phenyl-4,6-bis (trichloromethyl) -s-triazine, 2- (P-methoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (p-methylthiophenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (p-chlorophenyl) ) -4,6-bis (trichloromethyl) -s-triazine, 2- (2,4-dichlorophenyl) -4
- the amount of these photoacid generators is not particularly limited as long as the effect is exhibited, but if high polymerization activity is achieved, the acidic group-free polymerizable monomer is not limited.
- the amount is preferably 0.001 to 12 parts by mass, more preferably 0.005 to 6 parts by mass with respect to 100 parts by mass of the monomer.
- (IV) Filler The filler contained in the filling / restoration material constituting the dental filling / restoration kit of this embodiment exhibits a function of improving the strength of the cured product and suppressing shrinkage during polymerization.
- the inorganic filler is an inorganic filler excluding a basic inorganic material
- an organic filler is appropriately used. be able to.
- the inorganic filler examples include quartz, silica, silica titania, silica zirconia, lanthanum glass, barium glass, and strontium glass. Some of these inorganic fillers have a strong acid point on the surface, and the above-mentioned aliphatic amine compound and aromatic amine compound amine compound may be adsorbed. Therefore, the inorganic filler is preferably an inorganic filler that does not exhibit a bluish purple coloration due to 4-phenylazodiphenylamine, which is a strong base indicator, in anhydrous toluene.
- the measurement of the acid point using 4-phenylazodiphenylamine may be in accordance with a conventional method, but is usually carried out by the following method. That is, the filler is first dried at 100 ° C. for 3 hours or more and then stored in a desiccator containing diphosphorus pentoxide. 1 g of the filler is put in a sample tube bottle, and then 3 g of anhydrous toluene is shaken vigorously to agglomerate. Disperse so that there is nothing.
- organic filler examples include polymethyl (meth) acrylate, polyethyl (meth) acrylate, methyl (meth) acrylate / ethyl (meth) acrylate copolymer, methyl (meth) acrylate / butyl (meth) acrylate copolymer, or Non-crosslinkable polymer such as methyl (meth) acrylate / styrene copolymer, methyl (meth) acrylate / ethylene glycol di (meth) acrylate copolymer, methyl (meth) acrylate / triethylene glycol di (meth) acrylate A polymer or a (meth) acrylate polymer such as a copolymer of methyl (meth) acrylate and a butadiene monomer can be used.
- an organic-inorganic composite filler can also be suitably used.
- a granular organic-inorganic composite filler can be obtained by adding a polymerizable monomer to an inorganic filler in advance, forming a paste, polymerizing, and pulverizing.
- the organic-inorganic composite filler for example, TMPT filler (trimethylolpropane methacrylate and silica filler mixed and polymerized and then pulverized) can be used.
- the above-mentioned filler is treated with a surface treatment agent typified by a silane coupling agent, so that it has affinity for non-acidic group-containing polymerizable monomers and dispersibility in non-acidic group-containing polymerizable monomers.
- a surface treatment agent typified by a silane coupling agent
- the mechanical strength and water resistance of the cured product can be improved.
- the surface treatment agent and the surface treatment method are not particularly limited, and the same silane coupling agent as that used for the surface treatment of the basic inorganic material described above may be employed.
- the refractive index of the filler described above is not particularly limited. For general dental use, those having a refractive index in the range of 1.4 to 2.2 are preferably used. Moreover, there is no restriction
- the blending amount of the filler improves the strength of the cured body and suppresses shrinkage at the time of polymerization. Further, the filling material has a viscosity (operability) before curing depending on the blending amount. Since these properties can be adjusted, the range of 80 to 2000 parts by mass with respect to 100 parts by mass of the acidic group-free polymerizable monomer is preferred. A particularly preferable amount of the filler is 90 to 500 parts by mass, and most preferably 100 to 230 parts by mass with respect to 100 parts by mass of the acidic group-free polymerizable monomer.
- a polymerization initiator other than the photopolymerization initiator composed of each component (III) may be used in combination.
- Other polymerization initiators include aryl borate compounds / acidic compounds, organic peroxides / amine compounds, azo compounds / organic peroxides, acyl phosphine oxide compounds, thioxanthone compounds, ⁇ -aminoacetophenone compounds, and condensed polycyclic compounds.
- An aromatic compound is mentioned, and a condensed polycyclic aromatic compound is particularly preferable because of its excellent curing rate.
- the condensed polycyclic aromatic compound known compounds can be used without any limitation, but the condensed polycyclic aromatic compound has a structure in which a saturated carbon atom having at least one hydrogen atom is bonded to the condensed polycyclic aromatic ring.
- a group compound is preferable, and a condensed polycyclic aromatic compound having an anthracene ring is more preferably used. Specific examples include 9,10-dimethylanthracene and 7,12-dimethyl [a] benzoanthracene.
- the filling restorative material may be added with pigments, fluorescent pigments, dyes, ultraviolet absorbers to prevent discoloration to ultraviolet rays in order to match the color tone of the tooth, and other well-known ingredients of the filling restorative material.
- pigments fluorescent pigments, dyes, ultraviolet absorbers to prevent discoloration to ultraviolet rays in order to match the color tone of the tooth, and other well-known ingredients of the filling restorative material.
- additives may be added in a range that does not affect the effect of reducing neutralization of the aliphatic amine compound.
- the mixing method of each component described above may be in accordance with a known filling and restorative manufacturing method. In general, all components to be blended are weighed under red light to form a uniform solution. Mix well.
- Adhesive The adhesive constituting the dental filling / restoration kit of this embodiment contains (I) a polymerizable monomer containing an acidic group-containing polymerizable monomer, and (II) a polymerization initiator. (B) (I) Polymerizable monomer containing acidic group-containing polymerizable monomer In the dental filling / restoration kit of this embodiment, the acidic group-containing polymerizable monomer contained in the adhesive is a polymerizable monomer.
- a monomer having at least one acidic group in the molecule can be used without any limitation.
- the same thing as what was demonstrated with the said acidic group containing polymeric monomer corresponds to an acidic group.
- a carboxyl group, a phosphoric acid monoester group, or a phosphoric acid diester group is more preferable as an acidic group having high adhesiveness to tooth.
- the adhesive material contains the acidic group-containing polymerizable monomer.
- the filling restorative material filled on the cured layer of the adhesive material has a photopolymerization initiator configuration.
- An aliphatic amine compound and an aromatic amine compound are blended as components, but the filling restorative material is blended with another basic inorganic material, which competes or has priority over the acidic group of the adhesive. Since it neutralizes with the acidic group of the contained polymerizable monomer, the polymerization activity of the filling / restoring material is well maintained at the contact interface between the two materials.
- the effect of maintaining the high polymerization activity of the filling / restoring material is remarkably exhibited when the acidic group of the acidic group-containing polymerizable monomer is strongly acidic. Specifically, it is suitably exhibited when the pKa value is 2.15 or less at 25 ° C. in water. That is, the strong acid group is inherently high in decalcification ability and excellent in adhesion to the tooth. However, on the other hand, the neutralizing action of the aliphatic amine compound is strong.
- this strong acid group-containing polymerizable monomer is used for a filling restoration material using a photopolymerization initiator in which the ⁇ -diketone compound, aliphatic amine compound, aromatic amine compound, and photoacid generator are combined.
- the high polymerization activity of this photopolymerization initiator is greatly reduced.
- the basic inorganic material competes or preferentially neutralizes the strong acid group of the strong acid group-containing polymerizable monomer. For this reason, the polymerization activity ability of this photopolymerization initiator is not reduced by the neutralization reaction with the strong acid group, and the original polymerization activity ability can be sufficiently exhibited. As a result, it is possible to further increase the adhesive strength due to the high adhesion to the tooth due to the strong acid group and the high polymerization activity of the photopolymerization initiator.
- a phosphoric acid-based acid group is more preferable because it is particularly excellent in affinity to the tooth.
- the phosphoric acid-based acidic group is a group of acidic groups derived from phosphoric acid having a group —P ( ⁇ O) (OH) —.
- Specific examples of the phosphoric acid group include a phosphinic acid group, a phosphonic acid group, a hydrogen phosphonate monoester group, a dihydrogen phosphate monoester group, and a hydrogen phosphate diester group. Most preferred are acid dihydrogen monoester groups or hydrogen phosphate diester groups.
- acidic group-containing polymerizable monomers containing a dihydrogen phosphate monoester group or a hydrogen phosphate diester group examples include 2- (meth) acryloyloxyethylphenyl hydrogen phosphate, bis ((meth) acryloyl). Oxyethyl) hydrogen phosphate, (meth) acryloyloxyethyl dihydrogen phosphate, 10- (meth) acryloyloxydecyl dihydrogen phosphate, 6- (meth) acryloyloxyhexyl dihydrogen phosphate.
- Examples of those containing phosphinic acid groups include bis (2-methacryloxy) phosphonic acid, bis (methacryloxypropyl) phosphinic acid, bis (methacryloxybutyl) phosphinic acid, and the like.
- Examples of those having a phosphonic acid group include 3-methacryloxypropylphosphonic acid, 2-methacryloxyethoxycarbonylmethylphosphonic acid, 4-methacryloxybutoxycarbonylmethylphosphonic acid, 6-methacryloxyhexyloxycarbonylmethylphosphonic acid, 2- ( And 2-ethoxycarbonylallyloxy) ethylphosphonic acid.
- examples having a phosphonic acid hydrogen monoester group include 2-methacryloxyethylphosphonic acid mono (methacryloxyethyl) ester, 2-methacryloxyethylphosphonic acid monophenyl ester, and the like.
- examples of the acidic group-containing polymerizable monomer that can be suitably used in the dental filling / restoration kit of this embodiment include 11-methacryloyloxy-1,1-undecanedicarboxylic acid, 2- (meth) acryloyloxy.
- Ethyl hydrogen maleate 2- (meth) acryloyloxyethyl hydrogen succinate, 2- (meth) acryloyloxyethyl hydrogen phthalate, 11- (meth) acryloyloxyethyl-1,1-undecanedicarboxylic acid 2- (meth) acryloyloxyethyl-3′-methacryloyloxy-2 ′-(3,4-dicarboxybenzoyloxy) propyl succinate, 4- (2- (meth) acryloyloxyethyl) trimellitate Anhydride, N- (meth) acroylglycine, N- (meth) Carboxylic acid acidic group-containing polymerizable monomers such as cloylaspartic acid; Phosphonic acid acidic group-containing polymerizable monomers such as vinylphosphonic acid; Styrenesulfonic acid, 3-sulfopropane (meth) acrylate, 2- And sulfonic acid
- such an acidic group-containing polymerizable monomer may be blended as occupying all the polymerizable monomers to be blended.
- An acidic group-free polymerizable monomer may be used in combination as the body. From the viewpoint of sufficient adhesion of the adhesive to the teeth, the acidic group-containing polymerizable monomer is added in an amount of 5 to 50 parts by mass in 100 parts by mass of the total polymerizable monomer contained in the adhesive. Is preferred. More preferably, 10 to 30 parts by mass is blended in 100 parts by mass of the polymerizable monomer.
- the acidic group-free polymerizable monomer it is preferable to use a water-soluble polymerizable monomer and a water-insoluble polymerizable monomer, which will be described later, in accordance with the required physical properties. That is, it is preferable to use a water-insoluble polymerizable monomer because the mechanical strength of the adhesive is increased. On the other hand, the use of a water-soluble polymerizable monomer is preferable because it can improve the permeability of the adhesive to the tooth and the water compatibility of the water-insoluble polymerizable monomer. For example, when the water-insoluble polymerizable monomer is contained in the adhesive and coexists with water, phase separation may occur.
- the polymerization initiator contained in the adhesive is not particularly limited, and a chemical polymerization initiator can also be used favorably.
- a photopolymerization initiator from the viewpoint of operability such as heating or dividing the packaging into two or more materials in a redox system and mixing them immediately before use.
- photopolymerization initiators examples include ⁇ -diketones (specific examples are the same as those described in the component (i) of (A) filling restoration material); benzoin alkyls such as benzoin methyl ether, benzoin ethyl ether, and benzoin propyl ether.
- Ethers thioxanthone derivatives such as 2,4-diethoxythioxanthone, 2-chlorothioxanthone, methylthioxanthone, benzophenone derivatives such as benzophenone, p, p'-dimethylaminobenzophenone, p, p'-methoxybenzophenone 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (2,6-dimethoxybenzoyl) -2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (2,6-dimethoxybenzoyl) -2,4,4 -Trimethyl
- An acyl phosphine oxide derivative such as nitrophosphine oxide and bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide; and a photopolymerization initiator comprising a combination of aryl borate compound / dye / photoacid generator. is there.
- acylphosphine oxide 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (2,6-dimethoxybenzoyl) -2,4,4- Trimethylpentylphosphine oxide and bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide are preferred.
- aromatic amine compounds such as ethyl 4-dimethylaminobenzoate and lauryl 4-dimethylaminobenzoate. Is preferable.
- aromatic amine compound is a weakly basic compound, as a constituent component of such a photopolymerization initiator, the polymerizable monomer is used for curing a polymerizable composition containing an acidic group. Even when used, it exhibits sufficient polymerization activity.
- the photopolymerization initiator of the aryl borate compound / dye / photoacid generator system those described in JP-A-9-3109 and the like are preferably used, and more specifically, tetraphenylboron.
- An aryl borate compound such as a sodium salt is used as a dye, and a coumarin dye such as 3,3′-carbonylbis (7-diethylamino) coumarin or 3,3′-carbonylbis (4-cyano-7-diethylaminocoumarin) is used as a dye.
- those using a halomethyl group-substituted s-triazine derivative such as 2,4,6-tris (trichloromethyl) -s-triazine or a diphenyliodonium salt compound can be particularly preferably used.
- the photopolymerization initiators can be blended not only alone but also in combination of a plurality of types as required.
- the amount of these polymerization initiators is generally in the range of 0.01 to 30 parts by mass, more preferably 0.1 to 20 parts by mass with respect to 100 parts by mass of all polymerizable monomers contained in the adhesive. Within the range of the part.
- the aryl borate compound / dye / photoacid generator system the aryl borate compound is 0.01 to 15 parts by mass, the dye is 0.001 to 5 parts by mass with respect to 100 parts by mass of the polymerizable monomer,
- the photoacid generator may be 0.01 to 10 parts by mass.
- a chemical polymerization initiator when used as the polymerization initiator, a redox system that generates radicals by a combination of two or more compounds can be suitably used.
- Typical redox chemical polymerization initiators include systems composed of aryl borates and acidic compounds, and systems composed of barbituric acid derivatives, copper compounds and halogen compounds.
- a chemical polymerization initiator having an aromatic amine compound as a constituent such as a peroxide / aromatic amine compound system, has a slow chemical reaction and is involved in the aromatic amine compound.
- the curing reaction of the polymerizable composition in which the polymerizable monomer contains an acidic group does not function sufficiently. Therefore, when a chemical polymerization initiator is used as the polymerization initiator, it is preferable to avoid using a chemical polymerization initiator having such an aromatic amine compound as a constituent as much as possible.
- the compounding amount of these chemical polymerization initiators is also an effective amount within a range not inhibiting the effect of reducing the neutralization of the aliphatic amine compound (generally, it is included in the adhesive as in the case of the photopolymerization initiator.
- the amount is not particularly limited as long as it is 0.01 to 30 parts by mass, more preferably 0.1 to 20 parts by mass with respect to 100 parts by mass of the total polymerizable monomer.
- the adhesive constituting the dental filling / restoration kit of the present embodiment may contain water in order to help demineralization of the tooth.
- water when water is included, tooth decalcification ability is imparted to the adhesive, and therefore, a pretreatment agent is unnecessary and a one-step adhesive can be obtained, which is preferable.
- the water is coarsely evaporated by air blow after applying the adhesive to the tooth surface, but the residual material is eluted with metal ions as in the case of fluoroaluminosilicate glass. In the case where it is a natural one, it is preferably contained because it acts on the elution.
- Water is preferably contained in an amount of 3 to 50 parts by weight, more preferably 10 to 25 parts by weight, and more preferably 12 to 20 parts by weight with respect to 100 parts by weight of the total polymerizable monomer contained in the adhesive. Most preferably, it is included.
- the adhesive may contain a hydrophilic organic solvent having fluidity in order to further improve operability.
- a solvent such as acetone, ethanol, isopropyl alcohol, or tertiary butanol may be contained.
- a solvent having high volatility and low toxicity such as acetone, ethanol, or isopropyl alcohol is preferably used because it can be easily dried later.
- the content of the hydrophilic organic solvent is preferably 20 to 400 parts by mass, and more preferably 50 to 300 parts by mass with respect to 100 parts by mass of the total polymerizable monomer contained in the adhesive.
- the adhesive may contain a filler in order to increase the strength of the hardened layer.
- a filler in order to increase the strength of the hardened layer.
- the specific example can use the same thing as what was demonstrated by the above-mentioned (A) filling restoration material satisfactorily.
- fluoroaluminosilicate glass which is an ion-eluting filler.
- fluoroaluminosilicate glass which is an ion-eluting filler.
- the fluoroaluminosilicate glass used here is added within a range in which the acid group acidity of the acid group-containing polymerizable monomer is not significantly impaired and the effect of reducing neutralization of the aliphatic amine compound is significantly exhibited.
- the pH of the adhesive at 25 ° C. is maintained at 2.5 or less is preferable. More specifically, with respect to the total valence of the acid of the acidic group that the acidic group-containing polymerizable monomer has, the basic compound has a ratio of the total ionic valence of 0.8 or less, more preferably It is good to keep it below 0.7.
- an organic thickener such as a polymer compound such as polyvinyl pyrrolidone, carboxymethyl cellulose, or polyvinyl alcohol can be added to the adhesive as long as its performance is not degraded.
- Various additives such as ultraviolet absorbers, dyes, antistatic agents, pigments, and fragrances can be selected and used as necessary.
- An amine compound may be added for the action of a pH adjuster or the like.
- Each component described above is mixed into one liquid to form an adhesive.
- the form at the time of storage is preferably one liquid from the viewpoint of ease of operation.
- a chemical polymerization initiator it may be divided into two or more packages and used as one liquid at the time of use.
- the mixing method may be in accordance with a known method for producing a dental adhesive, and generally, all components to be blended may be weighed under red light and mixed well until a uniform solution is obtained.
- the adhesive since the adhesive generally has good fluidity, it is usually applied in such a manner that it is applied to the tooth multiple times with a brush, a spatula, a brush or a roller, but it may be applied to the tooth surface by spraying. . When it is necessary to use an etching agent separately, pretreatment may be performed in advance.
- drying After applying or spraying the adhesive on the cavity, it is preferable to dry the excess water and organic solvent by rough evaporation.
- a drying method for example, there are natural drying, heat drying, blowing drying, drying under reduced pressure, or a drying method combining them, but considering drying in the oral cavity, blowing with an air gun that emits dry air It is preferable to dry (about 3 to 20 seconds).
- the adhesive material is dried in this way, and a filling restoration material is placed on the cured adhesive material to fill the cavity.
- the method of using the filling / restoring material is not particularly limited. Generally, it is arranged with a spatula or the like and arranged in the same shape as an actual tooth. Finally, the filling / restoring material can be made effective by irradiating the filling / restoring portion with visible light using a dental irradiator.
- IPA isopropyl alcohol
- AN acetone
- DMEM N, N-dimethylaminoethyl methacrylate
- TEOA triethanolamine
- MDOA N-methyldiethanolamine
- DMPT N-dimethyl p-toluidine
- DMBE N, N-dimethyl p-ethyl benzoate
- DPI diphenyliodonium hexafluorophosphate
- DPIB 4-methylphenyl-4′-isopropylphenyliodonium tetrakis (pentafluorophenyl) borate
- TCT 2,4,6-tris (trichloromethyl) -s-triazine
- PBCT 2-phenyl-4,6-bis (trichloromethyl) -s-triazine
- AO Alumina powder (average particle size 0.02 ⁇ m, specific surface area: 100 m 2 / g)
- NaF Sodium fluoride (average particle size 4.0 ⁇ m, specific surface area: 2 m 2 / g)
- CS Calcium silicate (average particle size 5.0 ⁇ m, specific surface area: 2 m 2 / g)
- MF1 Fluoroaluminosilicate glass powder (Tokuso Ionomer, manufactured by Tokuyama Corporation) was pulverized to a mean particle size of 0.5 ⁇ m using a wet continuous ball mill (New My Mill, manufactured by Mitsui Mining Co., Ltd.) The filler surface was modified with 20 g of 5.0 N hydrochloric acid for 1 g of pulverized powder for 20 minutes.
- MF2 Fluoroaluminosilicate glass powder (Tokuso Ionomer, manufactured by Tokuyama Co., Ltd.) was pulverized to an average particle size of 1.5 ⁇ m using the wet continuous ball mill, and then 20 g of 5 g of pulverized powder was used. The filler surface is modified with 0N hydrochloric acid for 20 minutes.
- F1 Spherical silica-zirconia (average particle size 0.4 ⁇ m) hydrophobized with ⁇ -methacryloyloxypropyltrimethoxysilane and spherical silica-titania (average particle size 0.08 ⁇ m) ⁇ -methacryloyloxypropyltrimethoxy Mixture prepared by hydrophobizing with silane at a mass ratio of 70:30
- TPO 2,4,6-trimethylbenzoyldiphenylphosphine oxide
- PhB-TEOA tetraphenylborate triethanolamine salt
- Example 1 Comparative Example 1
- the combination of the adhesive B1 and the composite resin CR1 was used as a dental adhesive kit of each example and comparative example.
- the following adhesive strength measurement test was carried out for each dental adhesive kit.
- the following solar stability tests were implemented about each composite resin. The respective results are shown in Table 4.
- ⁇ Adhesive strength measurement test> The bovine anterior teeth were removed within 24 hours after slaughter.
- the extracted bovine front teeth were polished with # 600 enamel paper under water injection, and the enamel and dentin planes were shaved so as to be parallel and flat to the lip surface.
- compressed air was blown onto the ground surface for about 10 seconds to dry it.
- a double-sided tape having a hole with a diameter of 3 mm is affixed to this plane, and a paraffin wax having a thickness of 1.0 mm and a hole with a diameter of 8 mm is placed at the center of the hole of the double-sided tape previously attached, A simulated cavity was formed by fixing the center of the paraffin wax hole together.
- the simulated cavity was coated with an adhesive, left for 20 seconds, dried by blowing compressed air for 10 seconds, and irradiated with a visible light irradiator (Tokuso Power Light, manufactured by Tokuyama Corporation) for 10 seconds. Further, a composite resin was filled thereon, and visible light was irradiated for 3 seconds or 10 seconds with a visible light irradiator to prepare an adhesive test piece having a composite resin thickness of 1.0 mm.
- a mold capable of producing a disk-shaped test piece of 15 ⁇ 1 mm ⁇ and thickness of 0.5 ⁇ 0.1 mm is filled with a composite resin, crimped with a polypropylene film, and a visible light irradiator (Tokuso Power Light Co., Ltd.) 5 parts were irradiated with light for 10 seconds each so that the entire composite resin was exposed to light.
- Half of the test piece was covered with aluminum foil, which was exposed to direct sunlight for a total of 3 hours, and the aluminum foil was removed and stored in the dark for 5 hours. The color change of both the exposed part and the unexposed part was visually confirmed.
- Adhesive B1 in which an acidic group-containing polymerizable monomer is contained in the polymerizable monomer, an acidic group-free polymerizable monomer, an ⁇ -diketone compound, an aliphatic amine compound, an aromatic amine as a photopolymerization initiator In Example 1 comprising a combination of a compound, a photoacid generator, and a composite resin CR1 containing a basic inorganic material, both enamel and dentin were irradiated for 10 seconds of visible light and 3 seconds of irradiation. High adhesive strength was obtained. Moreover, the composite resin was also excellent in sunlight stability.
- Comparative Example 1 which was similarly performed using CR8 having the same composition and no basic inorganic material as the composite resin, the adhesive strength was enamel and dentin when irradiated with visible light for 10 seconds. On the other hand, although a considerably good adhesive strength was shown, the adhesive strength to both dentins was greatly reduced by irradiation with visible light for 3 seconds.
- the adhesion strength to the enamel when irradiated with visible light for 10 seconds was 21.1 (2.5) MPa
- the adhesion strength to dentin was 20.9 (2.0) MPa
- visible light 3 The adhesion strength to the enamel by second irradiation was 20.8 (2.1) MPa
- the adhesion strength to the dentin was 20.1 (2.5) MPa. That is, in Comparative Example 1, although the adhesive strength to both teeth was low when irradiated with visible light for 3 seconds, the adhesive strength measurement test was conducted to inhibit the polymerization reaction of the adhesive material by inhibiting oxygen molecules in the air.
- Example 1 In the case where the process is carried out without receiving (that is, the surface unpolymerized layer is not formed on the cured surface), the performance is greatly improved. This value was almost the same as the measurement result of Example 1 in which the adhesion strength measurement test was measured using CR1 having a composition in which a basic inorganic material was blended with composite resin CR8.
- Example 2 Comparative Examples 2 to 10.
- Example 1 except that the combination of the adhesive and the composite resin was changed to the one shown in Table 4, the adhesive strength of these dental filling / restoration kits and the solar stability of the composite resin were respectively changed. It was measured. The results are shown in Table 5 and Table 6, respectively.
- Example 11 in which the composite resin is CR12 having a larger amount of the aliphatic amine compound to be blended as the photopolymerization initiator, the color tone change is conspicuous, and the evaluation is made. Decreased.
- Example 1 the acidic group-containing polymerizable monomer contained in the adhesive is not a phosphoric acid-based acidic group, but a weak acid group, MAC-10 containing a carboxylic acid group.
- Example 24 which was carried out in the same manner except that it was used, the adhesive strength was slightly reduced as compared with Example 1. Furthermore, in this Example 24, when compared with the result of Comparative Example 10 using a composite resin that does not contain a basic inorganic material, the improvement rate of the adhesive strength of Comparative Example 10 in Example 24 is visible light. The enamel and dentin both increased by about 25% when irradiated for 3 seconds, and both the enamel and dentin increased several times and were smaller than the improvement rate of Comparative Example 1 of Example 1.
- Examples 1, 25 and 26 using aluminofluorosilicate glasses having different specific surface areas as basic inorganic materials to be blended in the composite resin in Examples 1 and 25, irradiation with visible light for 10 seconds and irradiation for 3 seconds were performed. In both cases, high adhesive strength was obtained for enamel and dentin, but in Example 26 using CR24 having a small specific surface area, the adhesive strength when irradiated with visible light for 3 seconds was slightly decreased.
- Example 27 4.0 g of PM, 4.0 g of Bis-GMA, 2.0 g of HEMA, 0.5 g of MF1, 1.5 g of water and 14.0 g of AN are weighed and mixed to produce adhesive A liquid. did. 0.7 g of PhB-TEOA, 0.17 g of HP, 27.0 g of AN, and 0.3 g of PMMA are weighed and mixed to produce adhesive B liquid.
- a chemical polymerization type adhesive B8 was manufactured by mixing and using the adhesive A liquid and the adhesive B liquid.
- the adhesive strength of the dental filling / restoration kit was mixed with the adhesive A liquid and the adhesive B liquid before applying the adhesive to the simulated cavity.
- the mixed adhesive material B7 was applied to a simulated cavity and left for 20 seconds, and then dried by blowing compressed air for 10 seconds, after which no visible light irradiation was performed.
- the adhesion strength to the enamel after irradiation with visible light for 10 seconds was 19.8 (2.8) MPa
- the adhesion strength to dentin was 18.6 (2.0) MPa
- visible light 3 The adhesion strength to the enamel by second irradiation was 19.1 (3.2) MPa
- the adhesion strength to the dentin was 17.8 (2.5) MPa, which was good.
- Example 11 In the adhesive strength measurement test performed in Example 27, the composite resin CR8 containing no basic inorganic material was used. As a result, the adhesive strength to the enamel after irradiation with visible light for 10 seconds was 19.2 (2.3) MPa, the adhesive strength to dentin was 18.0 (2.8) MPa, and visible light 3 Adhesion strength to enamel by second irradiation is 6.5 (2.4) MPa, adhesion strength to dentin is 2.3 (1.2) MPa, and at least in irradiation with visible light for 3 seconds Compared to Example 27, it was not sufficient.
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Abstract
Description
〔(A)充填修復材〕
このうち充填修復材には、(I)酸性基非含有重合性単量体、(II)塩基性無機材料、(III)i)α-ジケトン化合物、ii)脂肪族アミン化合物、iii)芳香族アミン化合物、及びiv)光酸発生剤が少なくとも組み合わされてなる光重合開始剤、並びに(IV)充填剤が含まれている。以下、充填修復材に含まれる各構成成分の詳細を説明する。
(A)(I)酸性基非含有重合性単量体
本実施形態の歯科用充填修復キットにおいて、充填修復材に含有させる酸性基非含有重合性単量体は、重合性単量体において、分子中に酸性基を有しないものが何ら制限なく使用できる。ここで、酸性基とは、ホスフィニコ基、ホスホノ基、スルホ基あるいはカルボキシル基等の、pKaが5より小さく、活性プロトンを解離可能な官能基をいう。
(1)単官能重合性単量体
エチルヘキシル(メタ)アクリレート、イソデシル(メタ)アクリレート、n-ラウリル(メタ)アクリレート、トリデシル(メタ)アクリレート、n-ステアリル(メタ)アクリレートシクロヘキシル(メタ)アクリレート、ベンジル(メタ)アクリレート、フェノキシエチル(メタ)アクリレート、イソボルニル(メタ)アクリレート、2-ヒドロキシエチル(メタ)アクリレート、3-ヒドロキシプロピル(メタ)アクリレート、テトラヒドロフルフリル(メタ)アクリレート、若しくはグリシジル(メタ)アクリレート等の(メタ)アクリル酸のアルキルエステル、1H,1H,3H-ヘキサフルオロブチルメタクリレート、1H,1H,5H-オクタフルオロペンチルメタクリレート、1H,1H,6H-デカフルオロヘキシルメタクリレート若しくは1H,1H,7H-ドデカフルオロヘプチルメタクリレート等の含フッ素(メタ)アクリレート、あるいは下記式(g)~(k)、(p)~(q)で示される(メタ)アクリレート等が挙げられる。
(2)二官能重合性単量体
二官能重合性単量体としては、例えば、エチレングリコールジ(メタ)アクリレート、ジエチレングリコールジ(メタ)アクリレート、トリエチレングリコールジ(メタ)アクリレート、ブチレングリコールジ(メタ)アクリレート、ネオペンチルグリコールジ(メタ)アクリレート、プロピレングリコールジ(メタ)アクリレート、1,3-ブタンジオールジ(メタ)アクリレート、1,4-ブタンジオールジ(メタ)アクリレート、1,6-ヘキサンジオールジ(メタ)アクリレート、1,9-ノナンジオールジ(メタ)アクリレート、1,10-デカンジオールジ(メタ)アクリレート、2,2-ビス((メタ)アクリロキシフェニル)プロパン、2,2-ビス[4-(3-(メタ)アクリロキシ)-2-ヒドロキシプロポキシフェニル]プロパン、2,2-ビス(4-(メタ)アクリロキシエトキシフェニル)プロパン、2,2-ビス(4-(メタ)アクリロキシジエトキシフェニル)プロパン、2,2-ビス(4-(メタ)アクリロキシテトラエトキシフェニル)プロパン、2,2-ビス(4-(メタ)アクリロキシペンタエトキシフェニル)プロパン、2,2-ビス(4-(メタ)アクリロキシジプロポキシフェニル)プロパン、2-(4-メタクリロキシエトキシフェニル)-2-(4-(メタ)アクリロキシジエトキシフェニル)プロパン、2-(4-(メタ)アクリロキシジエトキシフェニル)-2-(4-(メタ)アクリロキシトリエトキシフェニル)プロパン、2-(4-(メタ)アクリロキシジプロポキシフェニル)-2-(4-(メタ)アクリロキシトリエトキシフェニル)プロパン、2,2-ビス(4-(メタ)アクリロキシプロポキシフェニル)プロパン、あるいは2,2-ビス(4-(メタ)アクリロキシイソプロポキシフェニル)プロパン等が挙げられる。
(3)三官能重合性単量体
三官能重合性単量体としては、例えば、トリメチロールプロパントリ(メタ)アクリレート、トリメチロールエタントリ(メタ)アクリレート、ペンタエリスリトールトリ(メタ)アクリレートあるいはトリメチロールメタントリ(メタ)アクリレート等が挙げられる。
(4)四官能重合性単量体
四官能重合性単量体としては、例えば、ペンタエリスリトールテトラ(メタ)アクリレート、ジトリメチロールプロパンテトラ(メタ)アクリレート、あるいはペンタエリスリトールヘキサ(メタ)アクリレート等が挙げられる。
(A)(II)塩基性無機材料
本実施形態の歯科用充填修復キットにおいて、充填修復材に含まれる塩基性無機材料は、フィラー効果により充填修復材の強度を向上させると共に、かつ重合時において、接着材の硬化層との接触界面において、後述する光重合開始剤の重合活性を高度に保持する効果を発揮する。具体的には該光重合開始剤の構成成分であるii)脂肪族アミン化合物と競合、或いは優先して、接着材硬化層の表面未重合層に含まれる酸分と中和し、これら脂肪族アミン化合物が失活することを防止していると推察される。
<第一の充填修復材>
(I)酸性基非含有重合性単量体、(II,IV)塩基性無機材料(当該塩基性無機材料は充填材としての機能も兼ねる)、(III)i)α-ジケトン化合物、ii)脂肪族アミン化合物、iii)芳香族アミン化合物、及びiv)光酸発生剤が少なくとも組み合わされてなる光重合開始剤からなる。
<第二の充填修復材>
(I)酸性基非含有重合性単量体、(II)塩基性無機材料、(III)i)α-ジケトン化合物、ii)脂肪族アミン化合物、iii)芳香族アミン化合物、及びiv)光酸発生剤、並びに(IV)充填材(当該充填剤は、塩基性無機材料を除く充填材)からなる。
充填修復材において、塩基性無機材料の配合量は、特に制限されるものではないが、通常は、酸性基非含有重合性単量体100質量部に対して3質量部以上である。塩基性無機材料の配合量がこの値にある場合、接着材の硬化層との接触界面において、酸性基含有有重合性単量体との反応性が高まり好ましい。塩基性無機材料の特に好ましい配合量は、酸性基非含有重合性単量体100質量部に対して5~80質量部であり、10~30質量部が最も好ましい。
(A)(III)光重合開始剤
本実施形態の歯科用充填修復キットを構成する充填修復材は、光重合開始剤が、i)α-ジケトン化合物、ii)脂肪族アミン化合物、iii)芳香族アミン化合物、及びiv)光酸発生剤が組合されたものである。
i)α-ジケトン化合物
α―ジケトン化合物としては、例えば、ジアセチル、2,3-ペンタジオン、2,3-ヘキサジオン、ベンジル、4,4’ジメトキシベンジル、4,4’-ジエトキシベンジル、4,4’-オキシベンジル、4,4’-ジクロルベンジル、4-ニトロベンジル、α―ナフチル、β―ナフチル、カンファーキノン、カンファーキノンスルホン酸エステル、カンファーキノンカルボン酸エステルあるいは1,2-シクロヘキサンジオン等のα―ジケトン等が挙げられる。
ii)脂肪族アミン化合物
本実施形態の歯科用充填修復キットにおいて脂肪族アミン化合物は、窒素原子に結合している有機基が、すべて脂肪族基(但し、置換基を有していても良い)である化合物である。該化合物は対応するアンモニウム塩の25℃水中でのpKaが7以上、好ましくは7.5以上である塩基性が高い脂肪族アミンが好適である。
iii)芳香族アミン化合物
本実施形態の歯科用充填修復キットにおいて、芳香族アミン化合物は、窒素原子に結合した有機基のうちの少なくとも一つが芳香族基であるアミン化合物であればよく、公知のものが特に制限なく使用できる。該化合物は対応するアンモニウム塩の25℃水中でのpKaが6以下の芳香族アミンが好適である。
iv)光酸発生剤
本願明細書において、「光酸発生剤」とは、光を照射されることにより酸を発生する機能を有する化合物のことを言う。該光酸発生剤としては、公知のものが制限なく使用することができるが、具体的に例示すると、アリールヨードニウム塩、ハロメチル基置換―s-トリアジン誘導体、スルホニウム塩化合物、あるいはピリジニウム塩化合物等が挙げられる。これら光酸発生剤の中でも、重合開始能が高いことから、アリールヨードニウム塩及びハロメチル基置換―s-トリアジン誘導体が好適に利用できる。なかでも、太陽光安定性が良好であることから、アリールヨードニウム塩を用いることがより好ましい。
(A)(IV)充填材
本実施形態の歯科用充填修復キットを構成する充填修復材に含まれる充填材は、硬化体の強度を向上させ、且つ重合時の収縮を抑える機能を発揮する。このような充填材としては、無機充填材(当該無機充填剤は、塩基性無機材料を除く無機充填材)、有機充填材、および無機―有機複合充填材から選択される1種以上を適宜用いることができる。
〔(B)接着材〕
本実施形態の歯科用充填修復キットを構成する接着材には、(I)酸性基含有重合性単量体を含む重合性単量体、及び(II)重合開始剤が含有されている。
(B)(I)酸性基含有重合性単量体を含む重合性単量体
本実施形態の歯科用充填修復キットにおいて、接着材に含まれる酸性基含有重合性単量体は、重合性単量体において、分子中に少なくも1つの酸性基を有するものが何ら制限なく使用できる。なお、酸性基は、前記酸性基含有重合性単量体で説明したものと同じものが該当する。かかる酸性基の中でも、歯質に対する接着性が高い酸性基として、カルボキシル基、リン酸モノエステル基、またはリン酸ジエステル基がより好ましい。
(B)(II)重合開始剤
本実施形態の歯科用充填修復キットにおいて、接着材に含まれる重合開始剤は、特に限定されるものではなく、化学重合開始剤も良好に使用可能である。しかしながら、加熱したり、レドックス系における、包装を2材以上に分割し、これらを使用直前に混合する煩雑さを必要としない等の操作性の面から光重合開始剤を使用することが好ましい。
D-2.6E:2,2’-ビス[4-(メタクリロキシエトキシ)フェニル]プロパン
Bis-GMA:2,2’-ビス[4-(2-ヒドロキシー3-メタクリルオキシプロポキシ)フェニル]プロパン
3G:トリエチレングリコールジメタクリレート
HEMA:2-ヒドロキシエチルメタクリレート
UDMA:ウレタンジメタアクリレート
PM:2-メタクリロイルオキシエチルジハイドロジェンフォスフェートおよびビス(2-メタクリロイルオキシエチル)ハイドロジェンフォスフェートを質量比2:1の割合で混合した混合物
MDP:10-メタクリルオキシデシルジハイドロジェンフォスフェート
MAC-10:11,11-ジカルボキシウンデシルメタクリレート
IPA:イソプロピルアルコール
AN:アセトン
DMEM:N,N-ジメチルアミノエチルメタクリレート
TEOA:トリエタノールアミン
MDEOA:N-メチルジエタノールアミン
DMPT:N-ジメチルp-トルイジン
DMBE:N,N-ジメチルp-安息香酸エチル
[アリールヨードニウム塩]
DPI:ジフェニルヨードニウムヘキサフルオロホスフェート
DPIB:4-メチルフェニルー4’-イソプロピルフェニルヨードニウムテトラキス(ペンタフルオロフェニル)ボレート
TCT:2,4,6-トリス(トリクロロメチル)-s-トリアジン
PBCT:2-フェニルー4,6-ビス(トリクロロメチル)-s-トリアジン
BZ:ベンジル
CQ:カンファーキノン
HQME:ハイドロキノンモノメチルエーテル
BHT:2,6-ジーt-ブチルーp-クレゾール
AO:アルミナ粉末(平均粒径0.02μm、比表面積:100m2/g)
NaF:フッ化ナトリウム(平均粒径4.0μm、比表面積:2m2/g)
CS:カルシウムシリケート(平均粒径5.0μm、比表面積:2m2/g)
MF1:フルオロアルミノシリケートガラス粉末(トクソーアイオノマー、株式会社トクヤマ製)を湿式の連続型ボールミル(ニューマイミル、三井鉱山株式会社製)を用いて、平均粒径0.5μmまで粉砕し、その後、粉砕粉末1gに対して20gの5.0N塩酸にてフィラー表面を20分間改質処理したもの。(平均粒径:0.5μm、24時間溶出イオン量:27meq/g-フィラー、比表面積:40m2/g)
MF2:フルオロアルミノシリケートガラス粉末(トクソーアイオノマー、株式会社トクヤマ製)を上記湿式の連続型ボールミルを用いて、平均粒径1.5μmまで粉砕し、その後、粉砕粉末1gに対して20gの5.0N塩酸にてフィラーの表面を20分間改質処理したもの。(平均粒径:1.5μm、24時間溶出イオン量:20meq/g-フィラー、比表面積:20m2/g)
MF3:フルオロアルミノシリケートガラス粉末(トクソーアイオノマー、株式会社トクヤマ製)を上記湿式の連続型ボールミルを用いて、平均粒径3.0μmまで粉砕し、その後、粉砕粉末1gに対して20gの5.0N塩酸にてフィラーの表面を20分間改質処理したもの。(平均粒径:4.0μm、24時間溶出イオン量:8meq/g-フィラー、比表面積:1m2/g)
F1:球状―シリカジルコニア(平均粒径0.4μm)をγ―メタクリロイルオキシプロピルトリメトキシシランにより疎水化処理したものと、球状シリカーチタニア(平均粒径0.08μm)γ―メタクリロイルオキシプロピルトリメトキシシランにより疎水化処理したものとを質量比70:30にて混合した混合物
BS:2-ヒドロキシー4-メトキシベンゾフェノン
TPO:2,4,6-トリメチルベンゾイルジフェニルホスフィンオキサイド
PhB-TEOA:テトラフェニルボレートトリエタノールアミン塩
[過酸化物]
PMMA:ポリメチルメタクリレート
(1)塩基性無機材料の塩基性度測定
蒸留水とエタノールを体積比1:1で混合した溶液に、リン酸を滴下し、23℃においてpHメーター(本体:イオンメーターIM20E、電極:GST―5721S、何れも東亜ディーケーケー株式会社製)測定によりpH2.50に調整し、測定用分散媒体とした。内空部の底面積706.5mm2のビーカーに、該分散溶液を20gと塩基性無機材料を1.0g入れ、23℃において、Φ8mmで長さ20mmの攪拌子を用いて、回転数200rpmで2分間攪拌した。2分間攪拌直後の分散液のpHを液に浸したpHメーターで測定し、この時の分散液のpHから、分散媒体のpH値を差し引いた値をpH差とした。実施例及び比較例で使用した各種塩基性無機材料における測定値とpH差を表1に示した。
上記分散液を、100mlのサンプル管に0.2gを計り取り、IPAを用いて1質量%に希釈した。この液をシリンジフィルターでろ過し、ろ液をICP(誘導結合型プラズマ)発光分光分析を用いて、金属イオンの溶出の有無を確認した。実施例及び比較例で使用した各種塩基性無機材料における測定値とpH差を表1に示した。
7.0gのD-2.6E、2.0gの3G及び1.0gのUDMAに対して、0.05gのDMBE、0.05gのMDEOA、0.03gCQ、0.075gDPIB、0.015gのHQME、0.002gのBHT、及び0.2gのBSを加え、暗所にて均一になるまで攪拌し、マトリックスとした。得られたマトリックスを、20.9gのF1及び0.8gのMF1とメノウ乳鉢で混合し、真空下にて脱泡することにより、フィラー充填率68.0%の充填修復材CR1を得た。他のコンポジットレジン(CR2~CR18)も同様の手順で、表2および表3に示す組成にて作製した。
2.5gのPM、3.0gのBis-GMA、2.0gの3G、2.5gのHEMA、1.0gMF1、1.5gの水、8.5gのIPA、0.1gのCQ、0.15gのDMBEを計り取り、暗所にて混合し接着材B1を得た。他の接着材(B2~B7)も同様の手順で、表4に示した組成にて作製した。
接着材B1およびコンポジットレジンCR1の組合せで、各実施例および比較例の歯科用接着キットとした。それぞれの歯科用接着キットについて、以下の接着強度測定試験を実施した。また、各コンポジットレジンについて、以下の太陽光安定性試験を実施した。それぞれの結果を表4に示した。
牛を屠殺後24時間以内に牛前歯を抜去した。抜去した牛前歯を、注水下、#600のエナメリーペーパーで研磨し、唇面に平行かつ平坦になるように、エナメル質及び象牙質平面を削りだした。次に、削りだした平面に圧縮空気を約10秒間吹き付けて乾燥させた。次に、この平面に直径3mmの穴を有する両面テープを貼り付け、さらに、厚さ1.0mm及び直径8mmの穴を有するパラフィンワックスを、先に貼り付けられた両面テープの穴の中心に、パラフィンワックスの穴の中心をあわせて固定することで、模擬窩洞を形成した。この模擬窩洞に、接着材を塗布し、20秒放置後、圧縮空気を10秒吹き付けて乾燥し、可視光線照射器(トクソーパワーライト、株式会社トクヤマ製)で10秒光照射した。さらにその上にコンポジットレジンを充填し、可視光線照射器により可視光を3秒もしくは10秒照射して、コンポジットレジンの厚さが1.0mmである接着試験片を作製した。
15±1mmΦ、厚さ0.5±0.1mmのディスク状試験片を作成することができる型にコンポジットレジンを充填し、ポリプロピレンフィルムで圧着し、可視光線照射器(トクソーパワーライト、株式会社トクヤマ製)でコンポジットレジン全体に光が当たるように5箇所を各10秒ずつ光照射した。試験片の半分をアルミ箔で覆い、これをのべ3時間直射日光に暴露し、アルミホイルを外して暗所で5時間保存した。暴露部分と未暴露部分両方の色調変化を目視で確認した。
◎・・・露部分と未暴露部分の色調に差が無い
○・・・露部分と未暴露部分の色調の差がやや目立つ
△・・・露部分と未暴露部分の色調の差が目立つ
×・・・露部分と未暴露部分の色調の差がよく目立つ
比較例1で用いた歯科用充填修復キット(接着材B1,コンポジットレジンCR8)について、その接着強度測定試験を、模擬窩洞内に接着材を塗布し乾燥させた面に、ポリプロピレンフィルムを圧着して空気から遮断された状態で、可視光線を照射して硬化させ、その硬化層上でコンポジットレジンを硬化させる態様で実施した。この態様の場合、接着材の重合反応は空気中の酸素分子によって阻害を受けないで進行するため、その硬化面上には表面未重合層は実質的に存在していない。
実施例1において、接着材とコンポジットレジンの組合せを、表4に示したものに変更する以外は同様に実施し、これらの歯科用充填修復キットの接着強度、コンポジットレジンの太陽光安定性をそれぞれ測定した。結果を表5および表6にそれぞれ示した。
4.0gのPM、4.0gのBis-GMA、2.0gのHEMA、0.5gのMF1、1.5gの水、14.0gのANを計り取って混合し、接着材A液を製造した。0.7gのPhB-TEOA、0.17gのHP、27.0gのAN、0.3gのPMMAを計り取って混合し、接着材B液を製造。この接着材A液と接着材B液を混合して用いることで、化学重合型の接着材B8を製造した。
実施例27で実施した接着強度測定試験において、塩基性無機材料を含有していないコンポジットレジンCR8を用いる態様で実施した。結果は、可視光線10秒照射でエナメル質への接着強度が19.2(2.3)MPaであり、象牙質への接着強度が18.0(2.8)MPaであり、可視光線3秒照射でエナメル質への接着強度が6.5(2.4)MPaであり、象牙質への接着強度が2.3(1.2)MPaであり、少なくとも可視光線3秒照射において、実施例27と比べると十分でないものであった。
Claims (8)
- (A)(I)酸性基非含有重合性単量体、(II)塩基性無機材料、並びに、(III)i)α-ジケトン化合物、ii)脂肪族アミン化合物、iii)芳香族アミン化合物、及びiv)光酸発生剤が少なくとも組み合わされてなる光重合開始剤を含んでなる充填修復材と、
(B)(I)酸性基含有重合性単量体を含む重合性単量体、及び(II)重合開始剤を含んでなり、充填修復材の充填前に硬化させて使用する、歯牙と充填修復材との接着材と、
を含む歯科用充填修復キット。 - 前記(A)充填修復材において、(II)塩基性無機材料が、(I)酸性基非含有重合性単量体100質量部に対して少なくとも3質量部含んでいることを特徴とする請求項1に記載の歯科用充填修復キット。
- 前記(A)充填修復材において、(III)ii)脂肪族アミン化合物、及び(A)(III)iii)芳香族アミン化合物が、共に第三級アミンであることを特徴とする、請求項1に記載の歯科用充填修復キット。
- 前記(A)充填修復材において、(II)塩基性無機材料が、フルオロアルミノシリケートガラスであることを特徴とする、請求項1に記載の歯科用充填修復キット。
- 前記(B)接着材が、さらに(III)水を含んでなることを特徴とする、請求項1に記載の歯科用充填修復キット。
- 前記(B)接着材において、(I)酸性基含有重合性単量体を含む重合性単量体が、酸性基として、リン酸系酸性基を有するものである、請求項1に記載の歯科用充填修復キット。
- 前記(A)充填修復材には、(IV)充填材が含まれる請求項1に記載の歯科用充填修復キット。
- 歯科用充填修復キットが、前記(A)充填修復材、および、前記(B)接着剤からなる請求項1に記載の歯科用充填修復キット。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010800062008A CN102300545A (zh) | 2009-02-09 | 2010-02-03 | 齿科用填充修复成套用具 |
| JP2010549398A JP5615720B2 (ja) | 2009-02-09 | 2010-02-03 | 歯科用充填修復キット |
| EP10738352.3A EP2394628B1 (en) | 2009-02-09 | 2010-02-03 | Dental filling repair kit |
| US13/147,030 US8546459B2 (en) | 2009-02-09 | 2010-02-03 | Dental filling/restoration kit |
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| JP2009027018 | 2009-02-09 | ||
| JP2009-027018 | 2009-02-09 |
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| WO2010090011A1 true WO2010090011A1 (ja) | 2010-08-12 |
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| PCT/JP2010/000650 Ceased WO2010090011A1 (ja) | 2009-02-09 | 2010-02-03 | 歯科用充填修復キット |
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| US (1) | US8546459B2 (ja) |
| EP (1) | EP2394628B1 (ja) |
| JP (1) | JP5615720B2 (ja) |
| CN (1) | CN102300545A (ja) |
| WO (1) | WO2010090011A1 (ja) |
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| JP2010215597A (ja) * | 2009-03-19 | 2010-09-30 | Kuraray Medical Inc | 歯科用充填キット |
| JP2021004228A (ja) * | 2019-06-27 | 2021-01-14 | クラレノリタケデンタル株式会社 | 歯科用硬化性組成物 |
| WO2021251023A1 (ja) * | 2020-06-12 | 2021-12-16 | 株式会社トクヤマデンタル | 歯科用硬化性組成物 |
| JP2021195526A (ja) * | 2020-06-12 | 2021-12-27 | 株式会社トクヤマデンタル | 歯科用硬化性組成物 |
| JP2022139583A (ja) * | 2021-03-12 | 2022-09-26 | 株式会社松風 | 保存安定性に優れた歯科用接着性組成物 |
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| CN102895126B (zh) * | 2012-11-02 | 2014-07-02 | 东华大学 | 一种齿科修复树脂用有机/无机杂化填料的制备方法 |
| CN106413665B (zh) * | 2014-07-04 | 2019-08-13 | 德山齿科株式会社 | 粘接方法、粘接用成套用具以及粘接材料 |
| US11304879B2 (en) * | 2018-04-20 | 2022-04-19 | Kuraray Noritake Dental Inc. | Adhesive composition for dental use |
| US20220153894A1 (en) * | 2019-03-29 | 2022-05-19 | Mitsui Chemicals, Inc. | Photocurable composition, cured product, and dental product |
| EP3888616B1 (en) * | 2020-03-16 | 2024-05-15 | Shofu Inc. | Dental photocurable composition excellent in color tone selectivity |
| EP3881818B1 (en) | 2020-03-16 | 2024-03-06 | Kabushiki Kaisha Shofu | Dental photocurable compositions comprising photopolymerization initiator comprising an aryliodonium salt |
| CN115068348A (zh) | 2021-03-12 | 2022-09-20 | 株式会社松风 | 保存稳定性优异的牙科用固化性组合物 |
| US20220287918A1 (en) | 2021-03-12 | 2022-09-15 | Shofu Inc. | Dental adhesive composition excellent in storage stability |
| EP4205724A1 (de) * | 2021-12-29 | 2023-07-05 | Ivoclar Vivadent AG | Selbsthaftende dentale kompositzemente mit guter transparenz auf basis säurebehandelter füllstoffe |
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| JP7755917B2 (ja) | 2021-03-12 | 2025-10-17 | 株式会社松風 | 保存安定性に優れた歯科用接着性組成物 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2394628A4 (en) | 2015-01-28 |
| US20110288195A1 (en) | 2011-11-24 |
| CN102300545A (zh) | 2011-12-28 |
| EP2394628A1 (en) | 2011-12-14 |
| EP2394628B1 (en) | 2021-08-25 |
| JPWO2010090011A1 (ja) | 2012-08-09 |
| JP5615720B2 (ja) | 2014-10-29 |
| US8546459B2 (en) | 2013-10-01 |
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