DE102017131135A1 - Root canal filling composition - Google Patents

Abstract

The invention relates to a root canal filling composition for placement in a dental root canal, a kit for providing the required materials and a method of applying the materials. It is contemplated that the root canal filling composition comprises a glass fiber post and a dentin adhesive filling material.

Description

The invention relates to a root canal filling composition for placement in a dental root canal, a kit for providing the required materials and a method for applying the materials.

The material of choice for bacterial closure of the root canal system in teeth is currently gutta-percha with zinc oxide-eugenol, calcium hydroxide, silicone or epoxy resin based sealers. The gutta-percha / sealer system fulfills to a large extent all the requirements which have to be met by root canal filling material, such as biocompatibility, chemical stability, homogeneity, radio opacity, low technical sensitivity and the possibility of revision. However, with gutta-percha, no complete bacteria-proof occlusion of the root canal system can be achieved. Bacterial penetration may occur along the dentine-sealer or sealer-gutta-percha interfaces, as gutta-percha does not bind to either the root canal dentin or the sealer.

In endodontics, adhesive sealers are gaining in popularity over conventional sealers. Hybridization between collagen (root canal dentin) and plastic (methacrylate-based sealer) is intended to enable bacteria-tight occlusion of the root canal system, and - as in coronal cavities - to increase the mechanical resistance through the adhesive bond. However, unlike coronary dentin, parameters such as anatomical features of the root canal dentin may be important. the polymerization shrinkage of the sealer, as well as the high C-factor (relation bound to free surface) in the root canal affect the integrity of the adhesive bond to the root canals and promote an infection.

Another problem of the adhesive root canal filling of plastic-based sealer / gutta-percha and thus a possible entry port for bacteria is the lack of chemical compound of the plastic-based sealer with the polyisoprene component of gutta-percha.

There are currently two strategies for adhesive root canal filling. One strategy for binding methacrylate-based sealers to gutta-percha is to coat conventional gutta-percha tips with plastic components (polybutadiene-diisocyanate-methacrylate). In the coating (10 to 15 microns), the compound of the polyisoprene of gutta-percha to methacrylate in the sealer via a bifunctional diisocyanate is mediated, which binds via a hydrophobic group on the one hand to the polyisoprene of gutta-percha and on the other hand mediates the bond to the sealer via a hydrophilic methacrylate group. Even without the use of a primer, the hydrophilic sealer leads to a pronounced formation of tags in the dentinal tubules and a hybrid layer.

A second approach is to create a filled thermoplastic composite obturation material similar in properties to gutta-percha. The incorporated methacrylates ensure the connection to the methacrylate-based sealer. Resilon is a synthetic root canal filling material consisting of polycaprolactone (polyester polymer), dimethacrylates, as well as glass and radiopaque fillers. Resilon is soft and thermoplastic like gutta-percha. The plastic-based material is available either in the form of sticks or pellets and can be used with the known obturation techniques. After the preparation of the root canal system, Resilon is adhesively bonded to the root canal dentin by means of a self-etching primer and a dual-curing, methacrylate-based, hydrophilic sealer to coronally stabilize the structure.

However, contact of endodontic sealers with periapical hard and soft tissues may lead to local or systemic reactions (Geurtsen 2001). For plastic-based sealers, the ingredients can be cytotoxic or mutagenic.

The invention is based on the object to overcome the problems of the prior art and in particular to provide a bacteria-proof root canal filling, which does not have the known side effects of the composer or sealer.

The object is achieved by a root canal filling composition and a method and a kit for the production thereof having the features of the independent claims.

Thus, a first aspect of the invention relates to a root canal filling composition for placement in a dental root canal. The root canal filling composition according to the invention, also referred to as composition or root filling, comprises a glass fiber pin with a first and a second end, wherein an apical stop made of a physiological material is arranged at the first end and the fiberglass pin is at least partially enclosed by a filling material. According to the invention, the filling material comprises or consists of a dentine-adhesive filling material.

The advantage of the composition according to the invention is that a bacteria-proof root canal filling can be offered, the It is also perfectly compatible with the surrounding tissue. This is achieved by the combination of physiological apical stop and dentine-adhesive closure. Physiologically, in the present case, a material is to be understood which does not show any harmful influences on living tissue, wherein in the present case, in particular, the tissue adjacent to the apex, that is, essentially the periodontium, is turned off. The apical stop forms a barrier between living tissue and filling material and thus prevents contact and chemical or physiological interaction between filling material and tissue. In addition, the stop prevents filling material from exiting the apex into the surrounding tissue. The arrangement of the apical stop thus prevents short-term and long-term damage in the periodontium when combined with dentine-adhesive filling material. Therefore, the composition of the invention is also useful for root canal filling in inflamed apices or bone lesions in the apical region.

In the present case, a region of the glass fiber pin starting from the first end, which has the filling material over its entire circumference, is to be understood as "completely enclosed in regions." The restriction in some areas relates to the length of the fiberglass pin and makes it clear that in particular in a region adjacent to the second end no filling material is arranged, in particular in order to enable handling of the glass fiber pin. In particular, starting from the apical stop, the filling material extends from the first end over a full length of the fiberglass pin in the range of 85% to 99.9% of the channel length, in particular in the range of 90% to 99% of the channel length, or over a length in the range of 5 mm to 23 mm, in particular in the range of 8 mm to 19 mm.

The dentine-adhesive filling material is a material which, due to adhesive interactions in the uncured state, enters and closes the detintubuli of the tooth. This leads to a bacteria-proof closure in two ways. On the one hand, no germs can reach the tooth root via the dentinal tubules from the outside. On the other hand, a gap formation between dentine and filling material is prevented, whereby no germs from the oral cavity or from the apical area can penetrate into such a gap. As bacteria need space and food for multiplication ("bacteria needs food and space"), the germs are deprived of any propagation base. The composition of the invention therefore offers a significant reduction in medium and long-term complications, since on the one hand by the dentin-adhesive material triggerable inflammatory processes are prevented (short to medium term complications) and on the other a resettlement of bacteria in remaining open spaces (medium-term to long-term complications ) can be prevented.

A dentin-adhesive attachment is a method of treatment in dentistry for attaching restorative or dental restoration to the tooth. Here, the dentin surface of a cavity is chemically pretreated by thin-bodied Dentinhaftvermittler can penetrate into the surface structures and enter into a micro-mechanical bond between dentin and a composite filling after chemical curing. As a result, it is possible to dispense with macro-mechanical retentions which entail a greater loss of tooth substance.

In addition, the avoidance of gap formation between dentin and filling material leads to a stabilization of the tooth and prevents increased brittleness.

Composites (Latin compositum, the composite ') are tooth-colored plastic filling materials for dental treatment. Colloquially, the materials used since the 1960s are often referred to as plastic fillings. The dental application of the composites are fillings above the root canal and the attachment of ceramic restorations, crowns and root posts.

Composites consist of an organic plastic matrix, which is mixed with inorganic fillers. The application of the composites was initially almost exclusively in the anterior region. Meanwhile, composites with an increased filler content are also used in the posterior region. The further development of bonding agents (bonding) and the dentin adhesive technique enabled the use in the posterior region.

Modifications of the composites, which in the present case should also be understood by the term composite, are compomers, ormocers and glass ionomer cements. The latter formally belong to a different material class and in some cases include the abovementioned materials.

The processing of composite-based restorative material, that is to say a material which for the most part consists of composite based on the volume, is more complicated and time-consuming in comparison to an amalgam filling since it is applied in several layers and cured in layers with a polymerization lamp in order to cure the Reduce polymerization shrinkage of the material. Prerequisite for a permanently dense composite filling is the adhesive attachment to the tooth. This is achieved for example by an etching, in particular with phosphoric acid and subsequent application of an adhesive.

The matrix of composites consists in particular of methacrylate-based plastics. In addition, traces of formaldehyde, glutaraldehyde and acids may be included.

Preferably, the filler has fillers which can reduce or even prevent shrinkage of the material. The fillers used are glass, ceramic and quartz particles (silicates, sands). These further preferably have a coating with silanes, which improves their connection with the plastic. In other words, the silanization serves as a composite phase between the organic and the inorganic matrix. Silanes can chemically bond glass to an organic matrix. On the one hand, the silanol groups of the silane enter into a condensation reaction with the glass surface of the fillers. On the other hand, a covalent bond of the methacrylic acid group of the silane with the matrix plastic of the organic phase takes place.

The fillers are referred to as the inorganic phase of the composites. In the present case, fillers are selected from: glasses or glass ceramics (eg barium-aluminum glass), silicates, silicon dioxide.

The organic phase of the composite is advantageously a methacrylate (acrylic), which is in particular light-cured. Hydroxyethyl methacrylate (HEMA), triethylene glycol dimethacrylate (TEGDMA) or bisphenol glycidyl methacrylate (BisGMA) are used.

In addition to the actual monomer as the main constituent of the organic phase, composites, such as BisGMA composites, which contain further, in particular functional, constituents are preferred. The further constituents to be selected from the group are: mono-, di- and triacrylates (as comonomer) - see: copolymer, camphorquinone or phenylpropanediol (as an initiator of photopolymerization after illumination with the blue light of a polymerization lamp), toluidine (as accelerator of the photopolymerization ), Hydroquinone (as an inhibitor of photopolymerization, so that it does not already start in normal daylight), benzophenone (as a UV stabilizer, so that the plastic filling remains color-stable in the patient's mouth over the years), paints and pigments (for coloring for the plastic filling).

In a preferred embodiment, the filling material comprises composites selected from the group: highly viscous, packable composites - high proportion of filler, low-viscosity, flowable composites - reduced filler content - as an intermediate layer under the packable composites. More preferably, the polymerization of the composite takes place chemically and / or by light.

Dual-curing composites (ie both light and chemically polymerizable composites) are used when the supply of light to the composite material is partially excluded and are therefore particularly preferred for use in the composition according to the invention. These are then cured, for example, only at the accessible edges (additionally) with light, since the deeper layers of illumination are not accessible, while at the inaccessible to the light points chemical polymerization takes place.

Advantageously, the filler material comprises a composite, in particular a dual- or light-curing composite.

Further advantageously, the composite is a self-adhesive composite. This reduces, on the one hand, the number of components of the composition and, secondly, the treatment time when introducing the composition into a tooth, since at least one application of a so-called primer and optionally a preparatory etching can be dispensed with.

In a preferred embodiment of the invention it is provided that the fiberglass pin is formed in one or more parts. In the present case, a multi-part configuration is to be understood as meaning that a plurality of longitudinally extended parts which are not connected to one another in a materially cohesive manner and which are arranged next to one another form the fiberglass pin. The items are preferably releasably connected to a holder, such as a ring encircling the circumference of the glass fiber pin or a cap. Of course, a one-piece fiberglass pin also comprises a plurality of fibers, which, however, are then firmly bonded together. The advantage of a one-piece pen lies in particular in a more uncomplicated handling. In contrast, a multi-part fiberglass pin characterized by increased flexibility, higher thickness variability, by removing or combining individual parts, as well as a better adaptability to tapered root canals. For example, only a few of the parts are pushed into the tip of a tapered root canal, while the others only begin at a height with a wider root canal. This is not possible for simple one-piece pens. This disadvantage is advantageously compensated by a tapered tip of the first end of a one-piece fiberglass pin, although a flexible adaptation to various root canal geometries as given in multi-part pins can not be achieved.

Dual-curing composites still have a very high residual monomer content of up to 45% after curing. This is suspected to develop side effects for the patient. To counteract this is in a further embodiment of the invention, the fiberglass pin at least partially, especially in an area adjacent to the apical stop, such that it allows lateral light leakage. Upon illumination of the composition after placement in the tooth, a portion of the light at the second end is introduced into the fiberglass pin and passed therethrough to the first end. Even at a conventional glass fiber pen, the light exits at this end again. A nature of the glass fiber pin such that an additional lateral light emission is made possible results in a larger area, in particular an area in the interior of the root canal, becoming accessible to light. The degree of polymerization is significantly increased and a monomer content is reduced. In addition, composites can be used, which are mainly light-cured.

Preferably, such a nature of the glass fiber pen is achieved by the glass fiber pin is roughened in the area concerned and / or has regular or irregular elevations and depressions, for example in the form of a honeycomb or box pattern. Such embodiments can lead to a reduction in stability in the glass fiber pin, which, however, can be compensated by the bonding of the composite. In addition, the stability can be enhanced by having only some of the parts of a multi-piece fiberglass pin feature.

Alternatively or additionally, the fibers of a multi-part fiberglass pin are made in different lengths, wherein the individual parts are flush at the second end. At the second end, light emission at the respective end of the glass fiber is then achieved at different heights. This results in a wider range of light output and a larger photohardened surface. This embodiment allows an increased light exit surface without reducing the stability of the pen.

In a further preferred embodiment of the invention it is provided that the apical stop comprises a biologically absorbable material or consists of such. This has the advantage that a maximum physiological compatibility is given.

This is especially advantageous if the apical stop has or consists of a bone adhesive. As a result, not only is irritation of the surrounding tissue avoided, but even bone lesions in the apical region of the periodontium are healed by the composition according to the invention when applied in a root canal, or at least its healing is assisted.

It is further preferred if the apical stop is preformed or present as a precursor in pasty, that is, only partially cured form. Curing then takes place in particular by light curing by introducing light over the fiberglass pin and / or by curing a 2K mixture. If the stop is preformed, it is understood to mean a flexible, in particular compressible, plug which can be compressed in the root canal during insertion such that it penetrates into the apical region and optionally partially expands again at the destination, thereby closing the apex.

Thus, the apical stop preferably comprises collagen and / or a bone adhesive, in particular having hydroxyapatite.

In a further preferred embodiment of the invention it is provided that the apical stop has a length of not more than 1/10, in particular not more than 1/20, preferably not more than 1/30 of the length of the glass fiber pin. This results in the apical stop after insertion into the root canal being less than 1/10, in particular less than 1/15, preferably not more than 1/20 reaching into the root canal. This essentially corresponds to the working length, ie +/- 0, with preferably even -0.5 to -1 mm being achieved in the case of overstuffing. What brings the advantage that the largest possible part of the root canal is filled with the dentin-adhesive filling material, and thus as possible all Dentintubuli are closed and the tooth is stabilized over the entire length and no cavities or unstable areas in which arranged compressible or resorbable material is what would indirectly lead to cavities and thus instabilities and / or bacterial colonization.

Another aspect of the invention relates to a kit for producing the root canal filling composition according to the invention. The kit according to the invention comprises a glass fiber pin, in particular in one of the embodiments described above, an apical stop, preferably in a configuration described above or a precursor thereof, as well as a dentine-adhesive filling material in one of the embodiments described above or its precursors.

The set according to the invention advantageously makes the root canal composition described above possible with all the advantages described therein. The performance as a set has about it In addition, the advantage that all necessary educts and tools are included and thus when performing a tooth root canal filling only the set according to the invention must be provided and not in time-consuming search individual substances must be collected together. Furthermore, all starting materials are always consumed at the same time and exists. All this leads to a particularly effective time management at the practitioner. In addition, there are planning and synergy advantages on the producer side, which in turn makes a cost reduction possible, which makes itself noticeable on the part of manufacturers and manufacturers.

In the present case, precursors are to be understood as meaning a compound or a material which can be converted chemically or physically, in particular during application, into the stop or the filling material according to the invention. In particular, these are to be understood as meaning 2-component materials or those which, in particular, undergo chemical reactions in air.

The filler is pre-mixed with particular advantage and not or only partially cured. For this purpose, it is ready for application in the predetermined state. To protect against chemical Abreaktion and against bacteria, etc., the filling material is air and. In particular closed light-tight. In this case, preference is given to the presentation in a cannula or syringe, which in particular has an applicator.

The apical stop is preferably present as a compressible, elastic graft prefabricated in the set. It has dimensions in the range of 1 to 8 mm, in particular in the range of 0.2 to 1.5 mm, preferably in the range of 0.3 to 1 mm. The size of the graft preferably varies depending on the material used, in particular its compressibility. Particularly preferred is the use of a collagen plug having a proportion of hydroxyapatite in approximately cubic form with an edge dimension of in the range of 0.3 to 1 mm.

In a further preferred embodiment, the apical stop on at least one side, an irregular, in particular roughened and / or ribbed surface. This side preferably corresponds to a surface which, when used as intended, is directed apically, ie a side of the stop facing away from the root canal and facing a periodontium, in particular a bone. This embodiment has the advantage that, when the composition according to the invention is used, macrophages accumulate better on the surface of the stop and thus a healing of bone lesions can be accelerated.

Alternatively, the apical stop is in the form of a paste and / or in powder form. Especially in the last variant, a premix is carried out before application.

It should be understood that the kit according to the invention is used in endodontology and in particular not in prosthetics. The set according to the invention differs from one used in prosthetics in particular in the component of the apical stop.

In contrast to prosthetic pins, in the present case significantly thinner glass fiber posts are used with a diameter in the region of a root canal. In other words, the fiberglass pen used does not exceed a diameter of 0.5 mm, especially 0.3 mm. Advantageously, in addition to the root canal filling anchoring can be achieved when the fiberglass pin is designed to be longer than the root canal.

Alternatively, the filling material and / or the appical stop is present in individually packaged non-reactive individual educts, which are first mixed before application. It is preferred if all reactants are contained in equivalent amounts in the set.

In an advantageous embodiment of the kit according to the invention it is provided that this comprises a dentin-adhesive primer and / or an etchant. The primer is especially provided when the composite is not a self-adhesive composite.

The etchant is preferably pasty or liquid and also filled in a tube or syringe with applicator.

In a further preferred embodiment of the invention, the fiberglass pin, the apical stop or its precursor and the dentin-adhesive filling material or its precursor are spatially separated from each other, in particular individually packaged, arranged in the set.

Alternatively, the said components are present in the form of the root canal filling composition according to the invention, wherein the filling material arranged on the fiberglass pin is additionally enclosed in such an insulated manner that it is fixed to the glass fiber pen, in particular with contact therewith, and in particular is hermetically sealed and sterile. This is possible, for example, by means of a welded enclosure, for example in the form of a plastic. The sheath is placed in such a way that the apical stop is not enveloped, but rather is separated from the filling material to ensure that the apical stop does not coincide which may not be contaminated with physiological filling material. This embodiment has the advantage that the composition can be obtained in a few steps with enormous time savings and can be applied directly.

Both embodiments offer the advantage that no dimension of the educts must be made or residual stocks arise, which in turn must be stored. It is understood that regardless of the configurations of the set that the individual packages within the set are always hermetic, but especially sterile.

In the alternative embodiment, it is also advantageous if, in addition, filling material is packaged separately in the set in order to fill up any free spaces after application of the root canal filling in the root canal.

Advantageously, a holder in the form of a cap or an easily detachable ring is arranged at the second end of the glass fiber pen.

In a further preferred embodiment, it is provided that the set comprises each of the components in an amount which allows the filling of exactly one tooth. In principle, the set can be present in different sizes, one size being adapted in each case to the requirements of a tooth type. This means, in particular, that the set size is advantageously matched to the number of tooth roots or channels. In particular, the amount of composite, appalic stops, and the size (thickness) and amount of glass fiber pens vary in the different set designs.

A further aspect of the present invention is a method for applying a root canal filling composition according to the invention, in particular using the kit according to the invention.

1. a) Zunächst wird der apikale Stopp aus dem physiologischen Material in den Kanal bis zum Apex eingefügt. Dabei wird das Material überstpft, das heißt er wird zum, bezogen auf dessen Volumen, überwiegenden Teil aus dem Apex Wurzelkanal hinaus in das umgebende Gewebe gedrückt. In der Folge tritt der apikale Stopp aus dem apikalen Bereich hinaus und reicht nicht mehr als 1/10 der Gesamtwurzellänge in den Wurzelkanal hinein.

In the present case, the attachment of the root canal filling composition is carried out, in particular ex-vivo, ie, for example, in the case of an extracted tooth.
In any case, a previous opening of the tooth has occurred beyond the apical area. The method according to the invention comprises the following steps in the order indicated:

1. a) First, the apical stop is inserted from the physiological material into the canal to the apex. In this case, the material is overstuffed, that is, it is pressed, based on its volume, predominantly from the apex root canal out into the surrounding tissue. As a result, the apical stop comes out of the apical area and does not extend more than 1/10 of the total root length into the root canal.

This is followed by b) application of the filling. This includes the fiberglass pin and the dentin-adhesive filler material. For example, the fiberglass pin is dipped in the filler or the filler material is applied around it by applying. The mixture of stick and filling material is then introduced into the channel until the apical stop. The filling material enters into a bond with the fiberglass pin. In a multi-part design of the pin this is spread by the filler and filler penetrates into the resulting spaces. This creates on the one hand a better connection and on the other cavities are avoided. In addition, the stabilizing effect of the glass fiber pen is increased.

Finally, c) the filler is cured. This is preferably done with the aid of light. In order to ensure through-hardening and to keep a portion of unpolymerized monomers or oligomers small, hardening can either be carried out in individual layers or internal lighting can be achieved by the choice of the glass fiber pencils according to the invention. In this case, however, it is necessary that during curing, a part of the second end of the glass fiber pin of the curing lamp is accessible. Since light is then introduced into a part in the glass fiber pen and from there through it to the first end, where it also escapes in particular laterally and hardens the composite.

In particular, the method according to the invention has the advantage of saving time since, in comparison with the conventional methods, additional greasy overcasting of the coronal cavity and a revision of 50 to 70% of the newly placed root canal filling are eliminated, thus resulting in a plastic structure in only one step. It also serves training purposes to perform the procedure for use in vivo complication free.

The application in the living area has the advantage that a bacteria-dense root canal filling only possible, which is so far not possible due to side effects of the composite. The apical stop, and in particular the small extent of the same in the root canal, allows this as well as a maximum stabilization of the root by the cured composite compared to the use of a degradable bone adhesive.

When using the set alternative in which the root canal filling composition is already substantially in one piece, this is combined with the apical stop advancing into the root canal, such that the apical stop comes out of the root end into the surrounding tissue. The end remaining in the root canal does not extend more than 1/10 of the total canal length into it.

The working length is measured and maintained by means known to the person skilled in the art. To this end, for example, the radiographic or electronic measurement to call, which is then maintained by means of a scale or a stopper on each working means, in particular on the Einbringhilfe the apical stop or the glass fiber pen.

In the method according to the invention, in particular the use of the materials in the embodiments described above are preferred. In other words, all the above objects and uses of the invention and its embodiments are advantageous to combine. In addition, the statements relating to certain objects and uses of the invention always relate to the other objects and uses and their embodiments.

Further preferred embodiments of the invention will become apparent from the remaining, mentioned in the dependent claims characteristics.

The various embodiments of the invention mentioned in this application are, unless otherwise stated in the individual case, advantageously combinable with each other.

• 1 eine schematische Prinzipskizze einer Wurzelkanalfüllungszusammensetzung in einer bevorzugten Ausgestaltung,
• 2 ein Röntgenbild einer in einen Wurzelkanal applizierten Wurzelkanalfüllungszusammensetzung in der bevorzugten Ausgestaltung und
• 3 eine vergrößerte Darstellung eines Ausschnitts des Röntgenbildes aus 2.

The invention will be explained below in embodiments with reference to the accompanying drawings. Show it:

• 1 a schematic schematic diagram of a root canal filling composition in a preferred embodiment,
• 2 an X-ray image of a root canal filled in a root canal filling composition in the preferred embodiment and
• 3 an enlarged view of a section of the X-ray image 2 ,

1 shows a schematic principle sketch of a root canal filling composition 1 in a preferred embodiment of the invention. Shown is a glass fiber pen 2 the one-piece or multi-part can be configured. The fiberglass pen 2 has a first end 3 and a second end 4 on. Especially in multi-part design, the glass fiber pen tapers 2 to the first end 3 out. At the first end 3 of fiberglass pin 2 is an apical stop 5 arranged. This is made of a physiological material and preferably comprises a bone adhesive, such as hydroxylappatite. At the second end 4 of fiberglass pin 2 is a holder in the embodiment shown 7 arranged. This bracket 7 is basically optional but allows for stabilization especially if the fiberglass pin 2 multi-part shape is designed. To the glass fiber pen 2 around is a stuffing 6 arranged which consists of a dentin-adhesive material. The dentine-adhesive material has the advantage that when it is applied in an open tooth root canal, it penetrates into the dentinal tubules and thus seals the canal bacteria tightly and gives the opened root canal stability again after closure. The filling material 6 may further comprise particles having the effect of shrinkage of the filling material 6 reduce and at the same time increase the stability of the filling.

In 2 is a high-resolution X-ray image of a root canal filling composition according to the invention 1 filled root canal shown. In this embodiment, the filler material 6 an X-ray opaque addition, which makes it possible to make visible the arrangement of the filling material in the tooth root canal in the X-ray image. Shown is the fiberglass pin 2 , which in the embodiment shown to the apical end 3 goes chronic. This is especially due to the multi-part design of the glass water pen 2 reached, so that several fibers of the glass fiber pen 2 are designed in different lengths, so the diameter of the entire fiberglass pin 2 from the apical end 3 to the second end 4 of fiberglass pen 2 goes up. It becomes clear that the filling material 6 also penetrates into a strongly rejuvenated area of the root canal which represents the apical area of the tooth root canal, but without stepping out of it. Rather, the exit of the apical area towards the periodontium (not shown) is through the apical stop 5 locked. In 2 is the apical stop 5 to be seen only as a shadow, as this no X-ray opaque additions are attached. It becomes clear, however, that the apical stop 5 only to a very small extent, namely not more than one tenth, in particular not more than one twentieth of the total root canal length into the root canal.

In 3 is a section of the in 2 shown root canal filling shown. Particularly evident is the adhesion of the filling material into the dentinal tubules 11 of the tooth root canal, as well as the filling material 6 added fillers.

The root canal filling composition according to the invention 1 as well as the method for its application allows a bacteria-proof and stable root canal filling.

Embodiment for carrying out the method according to the invention in a preferred non-limiting embodiment:

As a prerequisite is a treated and dried channel. Subsequently, the appical stop according to the invention is introduced, followed by a self-etching bonding. After a short drying time, the glass fiber pin according to the invention with the filling material arranged thereon, in particular the composite, is introduced into the prepared and apically sealed channel. Finally, after curing of the composite, the construction of the tooth in the upper area and a modeling of the outer surfaces, in a cohesive step, ie without long waiting times.

Example of use:

Detailed attachment of the root canal filling composition of the invention in a preferred embodiment using the kit. The individual components were packed separately from each other. The kit in this example also comprises a phosphoric acid etchant and a dentine-adhesive primer in the basic fiberglass pen kit, 2-component filler with filler and physiological stop in the form of a hydroxyapatite-containing collagen plug.

First, an apical stop, for example, of a hydroxyapatite-containing collagen graft is introduced into the root canal and stuffed with a suitable tool such that the stop remaining in the canal does not extend more than 1/10, in particular not more than 1/20 in the total canal length into the root canal.

Subsequently, the dentin surface is etched with about 35% phosphoric acid for 15 seconds. In deciduous teeth, the Anätzdauer is halved. (The etch time may vary with acid concentration, the values shown here are exemplary only and are not essential to the invention, but are at the discretion of the practitioner). Thereafter, the acid is rinsed for about 30 seconds with the air-water spray, whereby the dissolved hard substance and the so-called smear layer is removed. What remains is the dentin freed of minerals. The remaining structures of collagen fibers and the pores of the dentinal tubules cleaned by the smear layer form the prerequisite for the micromechanical composite.

Subsequent application of a primer prepares the dentin and collagen fiber network for uptake of the hydrophilic monomers of a dentin-adhesive material. Sufficient surface moisture of the dentin is necessary so that the collagen fiber network does not collapse and can be penetrated by the monomer. The monomer, ie the dentin-adhesive filling material is applied and penetrates the collagen fiber network into the dentinal tubules. The resulting hybrid layer is cured by light-induced polymerization. This polymer layer is now micromechanically anchored via tags (English cones) in the tubules and in the penetrated collagen fiber network.

LIST OF REFERENCE NUMBERS

1

Root canal filling composition

2

glass fiber post

3

1st end

4

2nd end

5

apical stop

6

restorative

7

holder

10

dentin

11

dentinal tubules

Claims (14)

A root canal filling composition (1) for placement in a dental root canal comprising an elongated fiberglass pin (2) having a first end (3) and a second end (4), an apical stop (5) of a physiological material disposed at the first end (3); a filling material (6) enclosing the glass fiber pin (2) at least in regions, characterized in that the filling material (6) comprises a dentine-adhesive filling material (6). Root canal filling composition (1) according to Claim 1 , characterized in that the filling material (6) comprises or consists of a composite, in particular a dual-curing composite and / or a self-adhesive material. Wurzelkanalfüllzusammensetzung (1) according to any one of the preceding claims, characterized in that the glass fiber pin (2) is formed one or more parts, wherein in multi-part training a plurality of non-cohesively interconnected juxtaposed longitudinally extending parts form the glass fiber pin (2) and in particular via a holder (7) are releasably connected together. Root canal filling composition (1) according to Claim 3 , characterized in that the glass fiber pin (2) at least partially allows a lateral light emission. Root canal filling composition (1) according to any one of the preceding claims, characterized in that the apical stop (5) comprises or consists of a physiological material, in particular a bioabsorbable material. A root canal filling composition (1) according to any one of the preceding claims, characterized in that the apical stop (5) comprises collagen and / or a bone adhesive containing in particular hydroxyapatite. A root canal filling composition (1) according to any one of the preceding claims, characterized in that the apical stop (5) has a length of not more than 1/10, in particular not more than 1/20, the length of the glass fiber pin (2). Set for the preparation of a root canal filling composition (1) according to one of the preceding claims comprising a glass fiber pin (2), an apical stop (5) or its precursor, as well as a dentin-adhesive filler (6) or its precursor. Set after Claim 8 , characterized in that the filling material (6) is premixed and not or only partially cured. Set after one of the Claims 8 to 9 , characterized in that the filling material (6) is a composite, in particular a dual-curing or light-curing and / or a self-adhesive composite. Set after one of the Claims 8 to 10 , further comprising a dentin-adhesive primer. Set after one of the Claims 8 to 11 in which the fiberglass pin (2), the apical stop (5) or its precursor and the dentine-adhesive filling material (6) or its precursor are spatially separated, in particular individually sterile, arranged in the set or in the form of the root canal filling composition (1) after one of the Claims 1 to 7 is present, wherein in the latter arranged on the glass fiber pin (2) filler material (6) is additionally enclosed isolated so that it is fixed to the glass fiber pin (2) in particular with contact to this, and in particular hermetically and sterile completed is. Set after one of the Claims 8 to 12 wherein the kit comprises each of the ingredients in an amount that allows the filling of each tooth. A method of ex vivo attaching a root canal filling composition (1) to any one of Claims 1 to 7 in a root canal opened beyond the apical area, comprising the following steps in the order given: a) Attach the physiological apical stop in the apex, with the apical stop emerging from the apical area by overstuffing and not more than 1/10 of the total root length in the apex B) applying a filling material (6) in the root canal comprising a glass fiber pin (2) and a dentin-adhesive filling material (6), and c) curing the filling material (6).

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