[go: up one dir, main page]

WO2025017393A1 - Céramique dentaire dopée avec un matériau luminescent - Google Patents

Céramique dentaire dopée avec un matériau luminescent Download PDF

Info

Publication number
WO2025017393A1
WO2025017393A1 PCT/IB2024/056189 IB2024056189W WO2025017393A1 WO 2025017393 A1 WO2025017393 A1 WO 2025017393A1 IB 2024056189 W IB2024056189 W IB 2024056189W WO 2025017393 A1 WO2025017393 A1 WO 2025017393A1
Authority
WO
WIPO (PCT)
Prior art keywords
color
dental
dental ceramic
mass
garnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/IB2024/056189
Other languages
German (de)
English (en)
Inventor
Sven RÖSLER
Anne Schmidt
Felix OERIGK
Thomas Kaib
Dominik Uhlich
Stefan UNTERKIRCHER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leuchtstoffwerk Breitungen GmbH
Original Assignee
Leuchtstoffwerk Breitungen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102023005451.8A external-priority patent/DE102023005451A1/de
Priority claimed from DE102023119146.2A external-priority patent/DE102023119146A1/de
Application filed by Leuchtstoffwerk Breitungen GmbH filed Critical Leuchtstoffwerk Breitungen GmbH
Publication of WO2025017393A1 publication Critical patent/WO2025017393A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/486—Fine ceramics
    • C04B35/488—Composites
    • 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
    • A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
    • 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
    • A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
    • A61K6/818—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
    • 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
    • A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
    • A61K6/822—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising rare earth metal oxides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
    • C04B35/19—Alkali metal aluminosilicates, e.g. spodumene
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
    • C04B2235/3203—Lithium oxide or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3229—Cerium oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3286—Gallium oxides, gallates, indium oxides, indates, thallium oxides, thallates or oxide forming salts thereof, e.g. zinc gallate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3298—Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5463—Particle size distributions
    • C04B2235/5481—Monomodal
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/658—Atmosphere during thermal treatment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/658—Atmosphere during thermal treatment
    • C04B2235/6581—Total pressure below 1 atmosphere, e.g. vacuum
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/76—Crystal structural characteristics, e.g. symmetry
    • C04B2235/762—Cubic symmetry, e.g. beta-SiC
    • C04B2235/764—Garnet structure A3B2(CO4)3

Definitions

  • the invention relates to a dental ceramic based on silicate or zirconium dioxide.
  • a dental prosthesis whether an inlay, crown, bridge or implant crown
  • model the dental prosthesis for the tooth or group of teeth to be replaced manually or with the aid of a computer in a technical center and to produce the dental prosthesis from a dental ceramic.
  • the dental ceramic chosen for the dental prosthesis should, if possible, resemble the appearance of the adjacent, natural teeth in the patient's mouth. The appearance of the dental ceramic is subject to several parameters.
  • dental ceramics as tooth replacement materials that are made from zirconium dioxide, aluminosilicates or lutetium disilicate (the last two are referred to below as "silicate base"). These inorganic dental ceramics have a color due to appropriate pigmentation that is very close to that of the human tooth when illuminated with natural light.
  • auxiliary materials or additives are added to the dental ceramics used for this purpose. The material properties that can be adjusted in this way affect not only the color, but also the hardness, flexibility, chemical resistance and abrasiveness of the dental ceramics.
  • the manufacturer delivers ready-made raw material mixtures to a dental laboratory for firing/sintering.
  • the dental laboratory then sinters the dental ceramics in molds created specifically for each patient, strictly adhering to the sintering temperature and sintering time specified by the manufacturer.
  • fixed temperature programs are carried out as a temperature progression over time.
  • a protective gas atmosphere alternatively in a vacuum, but at least at a pressure significantly lower than atmospheric pressure.
  • Dental ceramics known to date have the property of displaying a luminescence property that mimics that of a natural tooth in typical black light scenarios.
  • Typical black light scenarios in which a patient can spend time after receiving their dentures have so far been discotheques and nightclubs, where black light tubes generate the typical ultraviolet radiation from a specially prepared fluorescent tube.
  • black light tubes generate the typical ultraviolet radiation from a specially prepared fluorescent tube.
  • black light from the well-known, dark violet black light tubes is used.
  • a natural tooth shows a turquoise to bluish color in black light due to its fluorescence.
  • the emission color of the dental ceramic can be slightly shifted and thus adapted to the patient's individual tooth color.
  • a bismuth compound is added to ceramics based on zirconium dioxide (ZrO2; zirconia) during production.
  • LEDs light-emitting diodes
  • X 365 nm
  • typical LED spotlights used to create a fluorescence effect have a radiation maximum shifted to longer wavelengths of 395 nm to 415 nm.
  • Such LED spotlights which are also called black light LEDs, are not only used in nightclubs, but have a wide range of applications.
  • Some of these applications are: illuminating products in a sales area so that the products can have a particularly have a high-contrast surface, the irradiation of fresh meat to give the meat a special, intense color, or even the use in flower sales rooms to make the flowers appear particularly colorful. It is also common for the food department in supermarkets to be illuminated with cold light, which also has a fluorescent component through black light LEDs, whereas the material department (non-food department) is illuminated with warm light that does not contain any fluorescent light components. Other scenarios in which black light LEDs are used are cinema lighting and, increasingly, lighting of toilets in public buildings and in underpasses.
  • the blue to violet lighting is intended to make drug abuse with injection drugs more difficult, because the blue color of human veins is very difficult to see in blue light under white skin.
  • the black light LEDs or "purple LEDs" mentioned above are also used wherever fluorescence plays a role, for example as an optical brightener.
  • the fluorescence intensities of the materials presented differ from each other and depend on the light source, particularly evident in the case of Lava Esthetic, where a 368 nm LED produces about a third of the fluorescence intensity achieved with daylight.
  • the German patent application DE 10 2017 104 166 A1 discloses a method for producing high-density and low-defect sintered components and a corresponding ceramic component.
  • the method disclosed therein includes the use of these high-density and low-defect ceramics in dentistry, among other areas.
  • various types of ceramics are mentioned without any information about the properties.
  • One of the ceramics is of the type AsB2[RO4]3, where B and R can also be identical. With identical B and R, the molecular formula is simplified to A3B5O12. These ceramics could also be cerium-doped.
  • a cerium-doped LuAG garnet is mentioned as an example.
  • the US patent application US 2021-0102116 A1 discloses zirconium oxide sintered bodies with a fluorescer.
  • the aim of the invention disclosed there is to provide a dental ceramic with a fluorescer that stands out in terms of both translucency and strength.
  • the fluorescence problem with regard to new LEDs with a different blue light than is the case with well-known fluorescent tubes is not mentioned at all.
  • YAG:Cer is only given as an example as a fluorescer.
  • zirconia ceramics doped with 4.5 to 9 mol% yttrium are disclosed.
  • Yttrium is added to the zirconia base material as salts.
  • the addition of garnet structures is not disclosed there.
  • the dentures may look dark and dull, giving the impression of a dead and rotten tooth. Although this is only a cosmetic defect, this unnaturalness of the dentures can be very It can be very disturbing and completely unacceptable for the patient because the supposedly dead and rotten tooth creates an unattractive and sickly image of the patient.
  • boundary layers can form that are colored and/or opaque, or the refractive index can differ greatly from the rest of the material. Both the formation of interfaces and the difference in refractive index can lead to optical defects that create the clouding effect. Since the enamel of natural teeth is crystal clear to a certain degree of clouding, the effect caused by the pigmentation should not affect the existing clouding in a way that is visible to humans.
  • Europium(l ⁇ ) compounds are known as phosphors in the field of phosphors for LEDs, which can be excited at a wavelength of X > 390 nm. Depending on the host lattice, such Eu(ll) phosphors can have a wide emission range. By doping the Eu(ll) phosphors with further ions of the rare earth metals, the perceived color can also be set quite well as a color location in the CIE standard valence diagram as a color map.
  • the comparison "like a natural tooth” is to be made on the basis of the average human color perception and on the basis of the average human color discrimination ability. This color perception and color discrimination ability was established by David Lewis McAdams in 1942 through investigations into CIE standard valence diagram was determined empirically and quantified by the so-called McAdams ellipses as an entry in the CIE standard valence diagram.
  • the dental ceramics according to the invention contain special luminescent materials, namely an admixture of a cerium-doped LuAG, cerium-doped YAG and/or a cerium-doped LuYAG garnet, wherein the LuAG garnet assumes the following chemical composition: Lu3-aCe a Al5-bGabOi2, wherein a assumes a value of 0.003 to 0.075 and b assumes a value of 0 to 3, the YAG garnet assumes the following chemical composition: Y3- a Ce a Al5-bGabOi2, wherein a assumes a value of 0.003 to 0.075 and b assumes a value of 1 to 3.5, and the LuYAG garnet assumes the following chemical composition: Y3- ac Lu c - Ce a Als-bGabOi2, wherein a assumes a value of 0.003 to 0.075, b assumes a value of 1 /s(
  • garnets are known as cerium-doped lutetium and/or yttrium-aluminum garnets (LuAG:Ce, YAG:Ce, Lu/YAG:Ce) and are available on the market.
  • the garnet contained in the dental ceramics can be pure cerium-doped yttrium garnet, a mixture of pure cerium-doped yttrium garnet and pure cerium-doped lutetium garnet, or pure cerium-doped lutetium garnet. It is also possible to use cerium-doped mixed garnets in which yttrium (Y) and lutetium (Lu) are present in any ratio.
  • Garnets as phosphors have the property of showing an emission in the greenish to yellow range when excited, which is colloquially referred to as "neon green” or "neon yellow".
  • the addition of a phosphor that fluoresces in the range perceived as greenish to yellow would at first glance be unsuitable for solving the inventive task.
  • this group of substances when sintered with a silicate-based or zirconia-based dental ceramic raw material powder as a dental substitute, leads to a luminescence behavior that is very similar to that of a natural tooth, so similar that the color perception of an average observer can no longer distinguish the luminescence color of the ceramic according to the invention as a dental substitute from the luminescence color of a natural tooth.
  • a commercially available raw material (dental ceramic raw material powder) for sintering the ceramic (VITA VMK Master) is mixed with a garnet as a phosphor with a composition according to the following table.
  • the commercially available dental ceramic in the form of a powder to be sintered is listed in the table as the matrix.
  • This mixture of the dental ceramic powder for sintering and the phosphors listed below was sintered in a furnace under dynamic vacuum (manufacturer: Vita Zahnfabrik H. Rauter GmbH & Co. KG, type: Vita VMK Master (silicate-based).
  • the surprising result is that the yellow-green to yellowish fluorescent garnets as phosphors tend to produce a luminescence that can best be described as bluish when sintered with the commercially available raw metal for dental ceramics.
  • the non-excited dental ceramics have a color in daylight that is at most insignificantly different from that of dental ceramics without the above-mentioned garnets as phosphors.
  • the translucency is undisturbed.
  • the surface of the dental ceramics has a clear layer. A similar cloudiness can be seen as in dental ceramics that were manufactured using state-of-the-art technology.
  • Different tooth luminescences can be achieved in two ways: firstly, by varying the concentration of garnet as a phosphor in the matrix of dental ceramics, and secondly by switching to a different type of phosphor.
  • Mixtures of dental ceramics with the above-mentioned garnets as phosphors have proven to be comparable to natural teeth in terms of fluorescence, which have the following concentrations of garnets as phosphors: between 0.2% by mass and 3% by mass, preferably between 0.3% by mass and 1.0% by mass, particularly preferably 0.5% by mass with a tolerance of 0.1% by mass.
  • sintering temperature when sintering the dental ceramic of 750°C to 1,000°C, preferably between 850°C and 980°C, particularly preferably 950°C with a tolerance of 5°C over a period of 2 min to 120 min, preferably between 10 min and 60 min with a tolerance of ⁇ 1 min.
  • the sintering of the dental ceramic takes place in a protective gas atmosphere of nitrogen and/or argon in order to avoid oxidation of the garnets as phosphors.
  • Another alternative is sintering under dynamic vacuum, or at least a pressure below 20 hPa.
  • the grain size of the garnet as phosphor in the raw material mixture is between 1 pm and 20 pm, preferably between 4 pm and 8 pm with a tolerance of 1 pm.
  • the gallium in the garnet can be partially or completely replaced by scandium. This does not significantly change the color location.
  • the advantage of gallium is that it is significantly cheaper to buy on the market than scandium.
  • Fig. 1 a sketch of a tooth front in different lighting scenarios
  • Fig. 2 a CIE diagram according to CIE 1931 with drawn McAdams ellipses that delimit places of equal color perception
  • Fig. 3 a CIE diagram according to CIE 1931 with marked color locations of dental ceramics, which according to the invention have various garnets as illuminants, when excited with light with a wavelength of 395 nm,
  • Fig. 4 is an enlarged detail of the diagram in Fig. 3,
  • Fig. 5 a CIE diagram according to CIE 1931 with marked color locations of dental ceramics, which according to the invention have various garnets as illuminants, when excited with light with a wavelength of 405 nm,
  • Fig. 6 is an enlarged detail of the diagram in Fig. 5,
  • Fig. 7 a CIE diagram according to CIE 1931 with marked colour locations of dental ceramics, which according to the invention contain various garnets as Lamps, when excited with light having a wavelength of 415 nm,
  • Fig. 8 is an enlarged detail of the diagram in Fig. 7,
  • Fig. 9 a turbidity experiment.
  • Figure 1 shows a sketch of a tooth front with a state-of-the-art dental prosthesis at position 2-1 (according to the dental tooth quadrant scheme "quadrant position") in different lighting scenarios.
  • the tooth front in the upper left corner shows the appearance of the teeth when illuminated with natural or artificial daylight.
  • the human eye cannot see any difference between the two upper incisors 1-1 and 2-1.
  • the same tooth front is shown illuminated with LED light in the visual range.
  • State-of-the-art dental ceramics, such as those present at position 2-1 cannot be distinguished from the appearance of a natural tooth at position 1-1 using human color discrimination, even with LED light in the visual range.
  • the same tooth front is sketched when illuminated with black light from black light tubes.
  • the effect of illuminating the same tooth front with a black light LED is shown in an exaggerated form.
  • the dental ceramics from the state of the art do not fluoresce in exactly this wavelength range, or at least not in the same way as a natural tooth does. This means that the dentures in position 2-1 are undesirable. appears darker than the neighboring teeth. This is precisely the effect that the dental ceramic doped according to the invention is intended to avoid.
  • FIG. 2 shows a CIE diagram according to CIE 1931 with drawn McAdams ellipses, whereby the McAdams ellipses delimit the color locations in the CIE standard color valence diagram of the same color perception.
  • the McAdams ellipses drawn in the CIE diagram are of different sizes at different color locations. This does not necessarily mean that a larger McAdams ellipse shows a color location with less human color differentiation power, because the larger McAdams ellipses are in the green area, where the wavelength density of the plot in the CIE standard color valence diagram is low. Conversely, smaller McAdams ellipses are in the dark blue and violet areas.
  • the wavelength density of the plot in the CIE standard color valence diagram is relatively high, which is reflected in smaller McAdams ellipses.
  • the quality of human color differentiation can be illustrated more clearly by reformed CIE diagrams that are mathematically distorted, such as the CIE UCS diagram from 1960 or the CIE LUV diagram from 1976.
  • the white point W is located approximately in the middle, from which any boundaries between dominant colors can be drawn.
  • the color gradient within the CIE standard valence diagram is continuous. Nevertheless, the human color perception suggests the course of the dashed lines that extend radially from the white point as the possible boundary between the colors separated from one another by the dashed lines.
  • the CIE standard valence diagram from 1931 shown here is introduced here in order to demonstrate the color locations of the emissions and the dental ceramics doped according to the invention in the next figures.
  • FIG. 3 shows a CIE diagram according to CIE 1931 with color locations of dental ceramics, whereby the dental ceramics according to the invention have various garnets as illuminants; this when excited with Light with a wavelength of 395 nm.
  • the CIE standard valence diagram in Figure 3 is slightly compressed vertically compared to the representation in Figure 2. However, the content of the CIE diagrams is identical. Instead of the McAdams ellipses, nine lines for nine different phosphors are drawn in this CIE standard valence diagram. These nine phosphors are characterized as follows:
  • the emission of all phosphors 1 to 9 has a green-yellow color, which is popularly associated with fluorescent color and is also popularly referred to as "neon yellow". This color is very different from the color of fluorescent natural teeth. Natural teeth fluoresce in the turquoise to bluish, and depending on perception even bluish-violet color range.
  • the color of the pure emission is not important, however. Rather, the mixed color of the emission and the reflected light perceived by humans is more important.
  • lines 1 to 9 depart from the color locations of the phosphors, which lead to the next color location, namely the color location of the mixed light from reflected excitation light and emission light.
  • the color location of this mixed light depends on the emission intensity of the phosphor and also on that of the excitation light reflected after absorption of the excitation light by the phosphor. Both emission intensity and absorption are material constants.
  • the first two points namely the color location of the emission and the color location of the mixed light from emission and reflected excitation light, refer to the pure phosphor.
  • the respective phosphor In order to examine the actual suitability as a dopant for a dental ceramic, the respective phosphor must be introduced into the dental ceramic and sintered with it. The phosphor can change during sintering.
  • the phosphor oxidizes or that the molecular / crystalline structure of the phosphor changes when incorporated into the host lattice of the dental ceramic.
  • the color location of the phosphor sintered into each dental ceramic 1 to 9 is the third point, all of which lie at the apex of the angle drawn with a bold line.
  • There, each marked with a star are the color locations of various natural, fluorescent teeth.
  • Two of the McAdams ellipses from Figure 2 are also shown there. The very narrow area in the area of the apex of the angle drawn is shown in the next figure as an enlarged detail A.
  • Figure 4 shows an enlarged detail of area A from the CIE standard valence diagram in Figure 3.
  • two color locations are marked with a star, which correspond to the fluorescence color of a natural tooth when excited with light with a wavelength of 395 nm.
  • Natural teeth show a certain range of fluorescence. The range is caused by possibly different fluoridation, whereby the age at fluoridation and also the intensity of fluoridation at the characteristic Fluorescence of natural teeth plays a major role.
  • Other parameters are the thickness of the tooth enamel and the natural color of the tooth, which is determined by the tooth structure. Organic biological substances that are individually enclosed in the tooth metal, here the dentin and the tooth enamel, can fluoresce.
  • All of the black squares shown in this enlarged detail correspond to the color locations of the respective phosphor when it is sintered into the host lattice of the dental ceramic at a concentration of 0.5% by mass.
  • the two McAdams ellipses shown here allow conclusions to be drawn that with the nine different phosphors, the color locations of the fluorescence of natural teeth can be set with a color accuracy that comes close to the color resolution of the human color perception.
  • the lines connecting the color locations of each phosphor are continued to the common origin at the angle shown.
  • the origin is the color location of the human color perception of the pure excitation light.
  • the color location for phosphor 9 which is outside the angle, corresponds to a dental ceramic that appears a little too violet in this excitation light.
  • This dental ceramic is a YAG garnet without gallium, the stoichiometry coefficient is 0, and thus falls outside the claimed range of the stoichiometry coefficient b and therefore has a luminescence that is no longer acceptable for imitating average teeth.
  • Figure 5 shows a CIE diagram according to CIE 1931 with the color locations of dental ceramics marked in, whereby the dental ceramics according to the invention have various garnets as illuminants; this is when excited with light with a wavelength of 405 nm.
  • the CIE standard valence diagram in Figure 5 is slightly compressed vertically compared to the representation in Figure 2. However, the CIE diagrams are identical in terms of content. Instead of the McAdams ellipses, nine lines for nine different phosphors are marked in this CIE standard valence diagram. These nine phosphors are characterized as follows: color location color location
  • the emission of all phosphors 1 to 9 has a greenish-yellow color, which is popularly associated with fluorescent color and is also popularly referred to as "neon yellow". This color is very different from the color of fluorescent natural teeth. Natural teeth fluoresce in the turquoise to bluish, and depending on perception even bluish-violet color range.
  • the color of the pure emission is not important, however. Rather, the mixed color of the emission and the reflected light perceived by humans is more important.
  • lines 1 to 9 extend from the color locations of the phosphors, leading to the next color location, namely the color location of the mixed light from reflected excitation light and emission light.
  • the color location of this mixed light depends on the emission intensity of the phosphor and also on that of the excitation light reflected after absorption of the excitation light by the phosphor. Both emission intensity and absorption are material constants.
  • the first two points, namely the color location of the emission and the color location of the mixed light from emission and reflected excitation light refer to the pure phosphor.
  • the respective phosphor In order to examine the actual suitability as a dopant for dental ceramics, the respective phosphor must be introduced into the dental ceramics and sintered with them. The phosphor can change during sintering.
  • the phosphor oxidizes or that the molecular / crystalline structure of the phosphor changes when incorporated into the host lattice of the dental ceramics.
  • the surprising thing about the present invention is that with the phosphors presented here, a coloration of the fluorescent dental ceramics can be achieved when excited with light with a wavelength of 405 nm that is very close to the color of a tooth that fluoresces when excited in this way.
  • the color location of the phosphor sintered into a dental ceramic is the third point, all of which are at the tip of the angle shown with a bold line.
  • There, each marked with a star are the color locations of various natural, fluorescent teeth.
  • Two of the McAdams ellipses from Figure 2 are also shown there. The very narrow area in the area of the apex of the drawn angle is shown in the next figure as enlarged detail A.
  • Figure 6 shows an enlarged detail A from the diagram in Fig. 5.
  • two color locations are marked with a star, which correspond to the fluorescence color of a natural tooth when excited with light with a wavelength of 405 nm.
  • Natural teeth show a certain range of fluorescence. The range is caused by fluoridation, whereby the age of fluoridation and the intensity of fluoridation play a major role in the characteristic fluorescence of natural teeth.
  • Other parameters are the thickness of the enamel and the natural color of the tooth, which is determined by the tooth structure. Organic-biological substances enclosed in the tooth metal can fluoresce.
  • This dental ceramic is a YAG garnet without gallium, stoichiometry coefficient is 0, and thus falls outside the claimed range of the stoichiometry coefficient b and therefore has a luminescence that is no longer acceptable for imitating average teeth.
  • Figure 7 shows a CIE diagram according to CIE 1931 with color locations of dental ceramics marked in, whereby the dental ceramics according to the invention have various garnets as illuminants; this is when excited with light with a wavelength of 415 nm.
  • the CIE standard valence diagram in Figure 7 is slightly compressed vertically compared to the representation in Figure 2. However, the CIE diagrams are identical in terms of content. Instead of the McAdams ellipses, nine lines for nine different phosphors are marked in this CIE standard valence diagram. These nine phosphors are characterized as follows:
  • the emission of all phosphors 1 to 9 has a greenish-yellow color, which is popularly associated with fluorescent color and is also popularly referred to as "neon yellow". This color is very different from the color of fluorescent natural teeth. Natural teeth fluoresce in the turquoise to bluish, and depending on perception even bluish-violet color range.
  • the color of the pure emission is not important, however. Rather, the mixed color of the emission and the reflected light perceived by humans is more important.
  • lines 1 to 9 extend from the color locations of the phosphors, leading to the next color location, namely the color location of the mixed light from reflected excitation light and emission light.
  • the color location of this mixed light depends on the emission intensity of the phosphor and also on that of the excitation light reflected after absorption of the excitation light by the phosphor. Both emission intensity and absorption are material constants.
  • the first two points, namely the color location of the emission and the color location of the mixed light from emission and reflected excitation light refer to the pure phosphor.
  • the respective phosphor In order to examine the actual suitability as a dopant for dental ceramics, the respective phosphor must be introduced into the dental ceramic and sintered with it. The phosphor can change during sintering.
  • the phosphor oxidizes or that the molecular / crystalline structure of the phosphor changes when incorporated into the host lattice of the dental ceramic.
  • the surprising thing about the present invention is that with the phosphors presented here, a coloration of the fluorescent dental ceramics can be achieved when excited with light with a wavelength of 415 nm that is very close to the color of a tooth that fluoresces when excited in this way.
  • the color location of the phosphor sintered into a dental ceramic is the third point, all of which are at the tip of the angle shown with a bold line.
  • There, each marked with a star are the color locations of various natural, fluorescent teeth.
  • Two of the McAdams ellipses from Figure 2 are also shown there. The very narrow area in the area of the apex of the drawn angle is shown in the next figure as enlarged detail A.
  • Figure 8 shows an enlarged detail A from the diagram in Fig. 8.
  • two color locations are marked with a star, which correspond to the fluorescence color of a natural tooth when excited with light with a wavelength of 415 nm.
  • Natural teeth show a certain range of fluorescence. The range is caused by fluoridation, whereby the age at fluoridation and the intensity of fluoridation play a major role in the characteristic fluorescence of natural teeth.
  • Other parameters are the thickness of the tooth enamel and the natural color of the tooth, which is determined by the tooth structure. Organic-biological substances enclosed in the tooth metal can fluoresce.
  • All black squares shown in this enlarged detail correspond to the color locations of the respective phosphor when this The respective phosphor is sintered into the host lattice of the dental ceramic at a concentration of 0.5% by mass.
  • the two McAdams ellipses shown here allow us to conclude that the nine different phosphors can be used to set color locations of the fluorescence of natural teeth with a color accuracy that comes close to the color resolution of the human color perception.
  • the lines connecting the color locations of each phosphor are continued to the common origin at the angle shown.
  • the origin is the color location of the human color perception of the pure excitation light.
  • the color location for phosphor 9, which lies outside the angle corresponds to a dental ceramic that appears a little too violet in this excitation light.
  • This dental ceramic is a YAG garnet without gallium, stoichiometry coefficient is 0, and thus falls outside the claimed range of the stoichiometry coefficient b and therefore has a luminescence that is no longer acceptable for imitating average teeth.
  • Figure 9 shows a matrix of ceramic plates that were produced using the sintering process described in Quintessenz Zahntech 2009;35(8):1018-102.
  • the dental ceramics according to the invention lie on the diagonal 6 min 980°C to 10 min 940° in terms of color under natural lighting and degree of turbidity.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Composite Materials (AREA)
  • Luminescent Compositions (AREA)

Abstract

L'invention concerne une céramique dentaire ayant une matrice à base de silicate ou de dioxyde de zirconium. Selon l'invention, la céramique dentaire est caractérisée par un mélange d'un LuAG dopé au cérium, d'un YAG dopé au cérium et/ou d'un grenat LuYAG dopé au cérium qui présente la composition chimique suivante : Lu3-aCeaAl5-bGabO12, où a a une valeur de 0,003 à 0,075 et b a une valeur de 0 à 3 ; le grenat YAG a la composition chimique suivante : Y3-aCeaAl5-bGabO12, où a a une valeur de 0,003 à 0,075 et b a une valeur de 1 à 3,5 ; et le grenat LuYAG a la composition chimique suivante : Y3-a-cLucCeaAl5-bGabO12, où a a une valeur de 0,003 à 0,075, b a une valeur de 1/3(3-a-c) à 3,25 et c a une valeur supérieure à 0.
PCT/IB2024/056189 2023-07-19 2024-06-26 Céramique dentaire dopée avec un matériau luminescent Pending WO2025017393A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102023119146.2 2023-07-19
DE102023005451.8 2023-07-19
DE102023005451.8A DE102023005451A1 (de) 2023-07-19 2023-07-19 Mit Leuchtstoff dotierte Zahnkeramik
DE102023119146.2A DE102023119146A1 (de) 2023-07-19 2023-07-19 Mit Leuchtstoff dotierte Zahnkeramik

Publications (1)

Publication Number Publication Date
WO2025017393A1 true WO2025017393A1 (fr) 2025-01-23

Family

ID=94281366

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2024/056189 Pending WO2025017393A1 (fr) 2023-07-19 2024-06-26 Céramique dentaire dopée avec un matériau luminescent

Country Status (1)

Country Link
WO (1) WO2025017393A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020017021A1 (en) 2000-07-21 2002-02-14 Carlino Panzera Molds for the manufacture of a dental restoration and methods of making dental restorations
US20120181919A1 (en) * 2008-08-27 2012-07-19 Osram Sylvania Inc. Luminescent Ceramic Composite Converter and Method of Making the Same
DE102017104168A1 (de) * 2017-02-28 2018-08-30 Forschungsinstitut Für Anorganische Werkstoffe - Glas Keramik Gmbh Verfahren zum fertigen von gesinterten kleinbauteilen, form und gesintertes kleinbauteil
DE102017104166A1 (de) 2017-02-28 2018-08-30 Forschungsinstitut Für Anorganische Werkstoffe - Glas Keramik Gmbh Verfahren zum fertigen von hochdichten und defektarmen gesinterten bauteilen, transparentes keramikbauteil und verwendung eines solchen
US20210102116A1 (en) 2017-07-31 2021-04-08 Kuraray Noritake Dental Inc. Zirconia sintered body containing fluorescent agent

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020017021A1 (en) 2000-07-21 2002-02-14 Carlino Panzera Molds for the manufacture of a dental restoration and methods of making dental restorations
US20120181919A1 (en) * 2008-08-27 2012-07-19 Osram Sylvania Inc. Luminescent Ceramic Composite Converter and Method of Making the Same
DE102017104168A1 (de) * 2017-02-28 2018-08-30 Forschungsinstitut Für Anorganische Werkstoffe - Glas Keramik Gmbh Verfahren zum fertigen von gesinterten kleinbauteilen, form und gesintertes kleinbauteil
DE102017104166A1 (de) 2017-02-28 2018-08-30 Forschungsinstitut Für Anorganische Werkstoffe - Glas Keramik Gmbh Verfahren zum fertigen von hochdichten und defektarmen gesinterten bauteilen, transparentes keramikbauteil und verwendung eines solchen
US20210102116A1 (en) 2017-07-31 2021-04-08 Kuraray Noritake Dental Inc. Zirconia sintered body containing fluorescent agent

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
QUINTESSENZ ZAHNTECH, vol. 35, no. 8, 2009, pages 1018 - 102

Similar Documents

Publication Publication Date Title
US8541329B2 (en) Process for the preparation of coloured blanks and dental shaped parts
DE10340597B4 (de) Transluzente und radio-opake Glaskeramiken, Verfahren zu ihrer Herstellung und ihre Verwendung
DE19904522C5 (de) Einfärbung von keramischem Zahnersatz mittels ionischer oder komplexhaltiger Lösungen
DE102009009706B4 (de) Aluminosilikatglas und Farbadaptionszusammensetzung für Keramikmaterialien
US11166882B2 (en) Process for providing fluorescence to a dental ceramic body
EP1515922B1 (fr) Vitroceramique opalescente
EP0885856B1 (fr) Vitrocéramiques d'apatite translucide chimiquement stable
DE102006024489A1 (de) Grünkörper, Verfahren zur Herstellung einer Keramik und deren Verwendung
DE60123013T2 (de) Verfahren zur herstellung von glasskeramiken
WO2025017393A1 (fr) Céramique dentaire dopée avec un matériau luminescent
DE102023005451A1 (de) Mit Leuchtstoff dotierte Zahnkeramik
DE102023119146A1 (de) Mit Leuchtstoff dotierte Zahnkeramik
DE19515773A1 (de) Gefärbte Glaskeramikgegenstände
DE2728266B2 (de) Fluoreszierendes anorganisches Pigment
DE19901783A1 (de) Dentales Restaurationsmaterial
CN110483041B (zh) 一种具有荧光效果的氧化锆瓷块的生产工艺
EP4091577A1 (fr) Composition opaque dentaire
DE736066C (de) Verfahren zur Herstellung von keramischem Zahnersatz
DE102015103439A1 (de) Verfahren zur Erhöhung der Transluzenz von keramischem Zahnersatz
HEIN et al. Die Wissenschaft hinter der Zahnfarbe.
EP4291542A1 (fr) Procédé de production d'un corps en céramique mis en forme, en particulier d'un corps en céramique de forme dentaire
DE112021005253T5 (de) Mehrschichtiger Zirkonoxid-Rohling zur zahntechnischen Verwendung mit Umkehrschichten, Verfahren zu seiner Herstellung und seine Verwendung
EP0682511B1 (fr) Materiau ceramique pour obturer des dents et/ou pour realiser des protheses et son procede de production
WO2025051863A1 (fr) Corps moulé en vitrocéramique à usage dentaire
TWI472351B (zh) Dental composite resin for fitting natural teeth and its preparation method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24742674

Country of ref document: EP

Kind code of ref document: A1