JP3922996B2 - Dental treatment component - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dental treatment member, strips, and a method for curing a filling material, and more particularly, to a dental treatment member, a dental strip, and a composite resin curing method using a photocurable polymerizable monomer. .
[0002]
[Prior art]
At present, a photocurable synthetic resin composed of an inorganic filler and a polymerizable monomer is widely used as a restoration material for a tooth defect portion because a color tone equivalent to that of natural teeth can be obtained at low cost. This synthetic resin is called a composite resin (hereinafter referred to as CR) and is easy to handle in the form of a paste or gel and has the property of being polymerized and cured when irradiated with ultraviolet rays or visible light. It is very excellent as a filling material for the cavity (for example, Patent Document 1).
[0003]
In this restoration method using CR, a bonding material for bonding the teeth and the CR is used. First, a bonding material is applied to the cavity portion. Then, paste-like or gel-like CR is applied to the teeth and irradiated with light. As a result, the cavity portion can be filled and returned to the original tooth shape.
[0004]
However, such a repair method has the following problems. As shown in FIG. 5, when the side wall between teeth is restored, strips are inserted between the tooth 101a to be restored and the adjacent normal tooth 101b. This is because CR and bonding material do not adhere to the adjacent teeth 101b. These strips are made of celluloid, cellophane, polyester, vinyl, etc., and the thickness is about 10 μm to 20 μm.
[0005]
On the other hand, when the side wall of the tooth is repaired, it is preferable that the gap between adjacent teeth is in contact with the normal tooth. When a contact gauge is inserted between the teeth, it is desirable that the distance between the teeth expands and the contact strength between the teeth (interdental opening) is about 50 μm to 100 μm. However, since the thickness of the strip itself is about 50 μm or more, the thickness is automatically added to the interdental opening when the strip is removed.
[0006]
Therefore, adjustment of the gap requires very skill, and the interdental opening may be increased to 110 μm or more. When this gap is widened, there is a problem that food residue is caught in the gap, which causes further periodontal disease or tooth decay.
[0007]
Further, there is a case where restoration is performed using an interdental wedge made of wood or plastic (for example, Patent Document 2). Even in this case, there is a problem that the gap becomes wider when the interdental wedge is removed.
[0008]
[Patent Document 1]
JP 2001-139411 A
[Patent Document 2]
Japanese Patent Laid-Open No. 9-10230
[0009]
[Problems to be solved by the invention]
As described above, the conventional method of repairing a gap between teeth using composite resin and strips has a problem that it is very difficult to adjust the gap.
[0010]
The present invention has been made to solve such problems, and when a tooth is restored using a filling material, the dental treatment member, strips, and filling that can be restored with high accuracy in a short time. An object is to provide a method for curing a material.
[0011]
[Means for Solving the Problems]
The dental treatment member according to the present invention is: The restoration part so as to surround at least a part of the restoration part of the tooth; (For example, cavity portion 2 in the embodiment of the present invention) Attached to the outer peripheral area of A dental treatment member (for example, the strip 3 in the embodiment of the present invention) for preventing the filling material filling the restoration portion from flowing out, By having a higher viscosity than the filler material, and polymerizing and crosslinking with the filler material by light irradiation, It adheres to the filling material. As a result, Easily sticks with filling material, It is possible to provide a dental treatment member that can be accurately restored in a short time.
[0012]
The dental treatment member according to the present invention comprises a filling material and Same Has a polymerizable monomer. Thereby, the dental treatment member and the filling material can be easily polymerized and fixed.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 of the Invention
A method for restoring teeth using the strips according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a plan view of a cavity portion and its periphery. 1 is a tooth, 2 is a cavity portion, 3 is strips, and 4 is bonding. Here, 1a indicates a tooth decay and has a cavity portion of the tooth decay. Reference numeral 1b denotes a normal tooth adjacent to the tooth 1a. Note that this repair method also uses a photo-curable composite resin (hereinafter referred to as CR) as in the conventional case.
[0025]
First, the cavity portion of the tooth 1a is cut away to form the cavity portion 2. By applying an etching solution to the cavity portion 2, the surface of the tooth becomes rough and the bonding material 4 is easily attached. The etching solution is washed with water and then dried with air. In some cases, no etchant is used. And the bonding material 4 for adhere | attaching CR is apply | coated inside the cavity part 2, and an ultraviolet-ray or visible light is irradiated. When CR is injected by the bonding material 4, the CR and the tooth are integrated and fixed.
[0026]
Then, as shown in FIG. 1, the strips 3 are attached so as to surround the outer peripheral region of the cavity portion 2 of the tooth 1 a, that is, a part or all of the outside of the cavity portion 2. The strips 3 preferably have light transmissivity, for example, a translucent or transparent material. In this case, it is desirable that the adjacent tooth 1b is less than or equal to an appropriate interdental opening (about 50 μm to 100 μm). If this interdental opening is wide, it will cause periodontal disease or caries. Then, the cavity portion 2 is filled with paste-like or gel-like CR. In addition, paste-like or gel-like CR shall be named generically as paste-like CR. Alternatively, the bonding material 4 may be attached after being attached to the strips 3. The CR may be pressure-contacted. In this case, the strips 3 are pressed against the adjacent teeth by the pressing force. Thereby, it becomes possible to make it contact | adhere with an adjacent tooth | gear.
[0027]
Furthermore, light is irradiated after this, CR is polymerized and hardened. At this time, if the strips 3 contain a polymerizable monomer like the CR, the CR and the strips 3 can be polymerized at the same time and can be integrated. That is, since the strips 3 are made of a material that is polymerized by light, the CR and the strips 3 are cross-linked and fixed when irradiated with light. In other words, by irradiating with light, the polymerizable monomer of CR and strips 3 is cross-linked, and a chemical bond is formed between these molecules to bond as a polymer. In this case, it is desirable that CR and strips 3 have the same or substantially the same polymerizable monomer (monomer) or a similar polymerizable monomer. In this way, the strips 3 and CR are integrated to form a three-dimensional network structure. Thereby, adhesive force improves and it can have hardness, mechanical strength, abrasion resistance, and other functions equivalent to teeth. The strips 3 may not be a photocurable resin but may be a chemically polymerizable resin. In the case of a chemically polymerizable resin, for example, room temperature polymerization and thermal polymerization are performed.
[0028]
Note that an inorganic filler may be added to the strips 3. With this inorganic filler, the viscosity of the strips 3 can be changed. Further, a cross-linking agent may be applied to the inside of the strips 3 and bonded. Alternatively, a cross-linking agent may be added to the CR or strips 3 for bonding. Thereby, both the adhesive force and the bonding force are improved.
[0029]
In this embodiment, the light applied to the CR and strips 3 is a light source using xenon or a halogen lamp. Further, visible light having a wavelength of about 450 to 500 nm was irradiated by a filter. Thereby, photopolymerization can be promoted efficiently and sufficient bonding and curing can be performed.
[0030]
As the polymerizable monomer, those generally used as dental monomers can be used. Commonly used products include polymerizable monomers having an acryloyl group and / or a methacryloyl group. Alternatively, any of hydrophilic and hydrophobic monomers may be used, or a mixture thereof may be used. Specific examples are shown below.
[0031]
Monofunctional vinyl monomers: methacrylates such as methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, hydroxyethyl methacrylate, tetrahydrofurfuryl methacrylate, glycidyl methacrylate, and acrylates corresponding to these methacrylates; or acrylic acid, methacrylic acid, p-methacryloyloxybenzoate Acid, N-2-hydroxy-3-methacryloyloxypropyl-N-phenylglycine, 4-methacryloyloxyethyl trimellitic acid and its anhydride, 6-methacryloyloxyhexamethylenemalonic acid, 10-methacryloyloxydecamemethylenemalonic acid 2-methacryloyloxyethyl dihydrogen phosphate, 10-methacryloyloxydecamethylenediha Mud Jen phosphate, 2-hydroxyethyl hydrogen phenyl phosphonate.
[0032]
Bifunctional vinyl monomer (1) Aromatic compound-based 2,2-bis (methacryloyloxyphenyl) propane, 2,2-bis [4- (3-methacryloyloxy) -2-hydroxypropoxyphenyl] propane , Bis-GMA), 2,2-bis (4-methacryloyloxyphenyl) propane, 2,2-bis (4-methacryloyloxypolyethoxyphenyl) propane (hereinafter abbreviated as D-26E), 2 , 2-bis (4-methacryloyloxydiethoxyphenyl) propane), 2,2-bis (4-methacryloyloxytetraethoxyphenyl) propane, 2,2-bis (4-methacryloyloxypentaethoxyphenyl) propane, 2, 2-bis (4-methacryloyloxydipropoxyphenyl) propaprop 2 (4-methacryloyloxydiethoxyphenyl) -2 (4-methacryloyloxydiethoxyphenyl) propane, 2 (4-methacryloyloxydiethoxyphenyl) -2 (4-methacryloyloxyditriethoxyphenyl) propane, 2 (4 -Methacryloyloxydipropoxyphenyl) -2- (4-methacryloyloxytriethoxyphenyl) propane, 2,2-bis (4-methacryloyloxypropoxyphenyl) propane, 2,2-bis (4-methacryloyloxyisopropoxyphenyl) Propane and acrylates corresponding to these methacrylates; metacrine such as 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 3-chloro-2-hydroxypropyl methacrylate Alternatively diadduct obtained from the addition of the diisocyanate compound having a vinyl monomer having a -OH group such as the corresponding acrylates to these methacrylates, diisocyanate methyl benzene, an aromatic group, such as 4,4'-diphenylmethane diisocyanate.
[0033]
(2) Aliphatic compound-based ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate (hereinafter abbreviated as 3G), butylene glycol dimethacrylate, neopentyl glycol dimethacrylate, propylene glycol dimethacrylate, 1, 3-butanediol dimethacrylate, 1,4-butanediol dimethacrylate, 1,6-hexanediol dimethacrylate and acrylates corresponding to these methacrylates; 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 3-chloro-2 -Having -OH groups such as methacrylates such as hydroxypropyl methacrylate or acrylates corresponding to these methacrylates Diadducts obtained from the addition of a nonyl monomer with a diisocyanate compound such as hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, diisocyanate methylcyclohexane, isophorone diisocyanate, methylenebis (4-cyclohexyl isocyanate); acrylic anhydride, methacrylic anhydride, 1, 2-bis (3-methacryloyloxy-2-hydroxypropoxy) ethyl, di (2-methacryloyloxypropyl) phosphate.
[0034]
C) Methacrylates such as trifunctional vinyl monomers trimethylolpropane trimethacrylate, trimethylolethane trimethacrylate, pentaerythritol trimethacrylate, trimethylolmethane trimethacrylate, and acrylates corresponding to these methacrylates.
[0035]
D) Tetrafunctional vinyl monomers pentaerythritol tetramethacrylate, pentaerythritol tetraacrylate and diisocyanate methylbenzene, diisocyanate methylcyclohexane, isophorone diisocyanate, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, methylenebis (4-cyclohexylisocyanate), 4,4- Diaducts obtained from the addition of diisocyanate compounds such as diphenylmethane diisocyanate, tolylene-2,4-diisocyanate and glycidol dimethacrylate.
[0036]
These polymerizable monomers may be used alone or in combination of two or more. These monomers can be used for CR and Strips 3.
[0037]
Moreover, the inorganic filler currently known can be used as the inorganic filler. For example, spherical or substantially spherical particles made of a material such as amorphous silica, silica-titania, silica-zirconia, silica-titania-barium oxide, quartz, and alumina. Furthermore, a small amount of Group I metal oxides are present in the inorganic oxide particles for the purpose of easily obtaining dense inorganic oxide particles when these inorganic oxide particles are fired at a high temperature. It is also possible to use mixed oxide particles. For dental use, spherical inorganic fillers of complex oxides mainly composed of silica and zirconia are often used. This inorganic filler has the characteristics that it has X-ray contrast properties and a cured product of a composite composition having excellent wear resistance can be obtained. These inorganic fillers can be added to the CR and strips 3.
[0038]
As this inorganic filler, a spherical or substantially spherical inorganic filler having an average particle diameter of about 0.001 to 1 μm and a glass filler having an average particle diameter of about 1.5 to 2.0 μm can be used. Moreover, you may use fillers other than these average particle diameters. Alternatively, an organic / inorganic composite filler may be used.
[0039]
The strips 3 preferably have a certain level of strength in order to play a role as a bank. This can increase the strength by increasing the filling rate of the inorganic filler into the polymerizable monomer (for example, filling the inorganic filler to 90 wt% or more). By filling the inorganic filler at a high density, the photopolymerization shrinkage ratio is reduced. Therefore, the volume change after curing can be reduced, and the difference between filling and curing is reduced, so that more accurate repair can be performed.
[0040]
It is also possible to increase the intensity by irradiating only the outer portion of the strip 3 with light before filling with CR. In this case, it is desirable to irradiate with the light intensity reduced to some extent. Further, the cavity portion 2 may be covered with a cover or the like so that light is not irradiated on the inner side. Alternatively, the strength can be increased by adding other materials. By providing these strips with the same material (monomer) as CR, the CR and strips 3 can be easily polymerized (bonded). Moreover, you may use not only the same kind of monomer but a similar monomer.
[0041]
The strips 3 are preferably formed in a thin plate shape, a film shape or a tape shape. Thereby, a necessary part can be cut and used appropriately. The thickness of the strips 3 can be about 50 μm as in the conventional case, and other thicknesses may be used. Also, it is desirable to prepare a thickness, width and length according to the shape of the cavity and the size of the teeth. Moreover, when using the thin plate-shaped or film-shaped strips 3, you may attach it, after irradiating light to one surface used as an outer side and raising intensity | strength. In this case, it is desirable to use cellophane or the like thinner than the conventional strips. When cellophane or the like is used, it is desirable to apply the monomer so that the film has a certain degree of strength.
[0042]
It should be noted that the strips 3 other than the cavity portion 2, that is, the strips 3 that are unnecessary for repairing, may be cut and removed after being cured by irradiation with light. For example, it can be removed using a drill, a polishing strip, a polishing disk, or the like. In this case, as shown in the figure, the part to be removed is removed from the narrow part between the teeth, so that the polishing can be performed with high accuracy and the polishing time can be shortened. Furthermore, the strips 3 of the portion that is irradiated with light and hardened can be polished and removed with a drill or the like. Since the bonding material 4 is not applied to the portion from which the strips 3 are removed, it is not bonded to the tooth. Therefore, the work can be easily performed without damaging the teeth of the normal part. In addition, since the portions where the teeth are close to each other are flanked, there is no space limitation and the operation can be easily performed. In this way, the interdental portion can be easily repaired by attaching the strips 3 so as to provide an appropriate gap in the interdental portion. Furthermore, the gap between the interdental portions can be accurately restored. Of course, it is possible to remove a certain amount of strips before irradiating light, or to attach only a small amount of strips in advance. In this way, the time for polishing or the like can be shortened. Accordingly, the cavity portion 2 can be repaired in a short time, and the treatment time can be shortened.
In addition, as shown in FIG. 2, the strips 3 may be fixed to the tooth portion of the portion beyond the cavity portion 2. In this case, the strips 3 are cut at points A and B in FIG. And in order to set it as such a structure, it is necessary to apply | coat the bonding material 4 to the tooth | gear of the part beyond the cavity part 2 previously.
[0043]
Furthermore, the strips 3 are preferably a photo-curable resin, and may contain materials other than the above-described polymerizable monomer and filler. For example, it may contain a polymerization initiator, a light absorber and the like. By containing these, polymerization can be promoted and adhesiveness and mechanical strength can be improved. Further, a pigment or the like may be included so as to have a color tone equivalent to that of natural teeth. Thereby, the aesthetics of a tooth can be improved.
[0044]
Embodiment 2 of the Invention
In the present embodiment, the repair is performed by integrating the strips and the CR as in the first embodiment. The repair using the strips according to the present embodiment will be described with reference to FIG. 1 as in the first embodiment. Further, the restorative material and the restorative procedure other than the strips 3 can be the same as those in the first embodiment, and the description thereof will be omitted. In the present embodiment, unlike the first embodiment, in the present embodiment, the inside of the strips 3 is integrated using a bonding material. That is, after the strips 3 are attached to the cavity portion 2, a bonding material is applied to the inside of the strips 3, and the CR and the bonding are fixed. Accordingly, in the present embodiment, the strips 3 can be formed of a material other than the polymerizable resin.
[0045]
For example, a thin plate-like, film-like or tape-like polycarbonate, SiC or gypsum can be used. These may also be surface-treated. By using a surface-treated polycarbonate or the like, it is possible to obtain a color tone equivalent to that of an actual tooth. The bonding material is preferably made of a material suitable for the strips 3 and CR. Of course, a bonding material different from the bonding material of the tooth quality and CR may be used. Since such a material does not shrink due to polymerization, it can be repaired in a more accurate form.
[0046]
As shown in the present embodiment, the CR and the strips can be integrated by applying a bonding material to the inside of the strips 3. In addition, the content equivalent to the content demonstrated in Embodiment 1 is abbreviate | omitted. Of course, the strips 3 may be formed by further using film-like cellophane, vinyl, or the like as in the first embodiment. Of course, even the strip according to the first embodiment can use the bonding material as shown in the present embodiment.
[0047]
Embodiment 3 of the Invention
In the present embodiment, the same repair is performed using the same strips as in the first and second embodiments. However, in the present embodiment, the portion between the teeth and the gums is repaired. A method for repairing teeth and gingiva using the strips according to the present invention will be described with reference to FIG. FIG. 3 is a side view of the repaired portion when a decayed tooth occurs in the portion between the tooth and the gingiva. 1 is a tooth, 2 is a cavity portion, 4 is bonding, 5 is gingiva, and 6 is a pocket.
[0048]
The teeth and gingiva are in contact with each other in a normal state, but when the gap is examined with a probe, a gap of about 2 to 5 mm is opened, and this is usually called a pocket. When the teeth and gingiva portions become decayed, it is difficult to repair the teeth because it is necessary to provide the pockets 6 and to repair the gingival portions so as not to be damaged.
[0049]
A CR is usually used for repairing this portion, but when a CR having a low viscosity, that is, a liquid-like CR, is used, the pocket 6 having a sufficient gap is not formed, and the gingiva may be contacted. Furthermore, it sometimes protrudes from the pocket 6. When CR having a high viscosity is used, the CR may not be sufficiently filled and repair may be insufficient.
[0050]
The strips in the present invention can also be used for restoration between teeth and gums. That is, the strips described in the first or second embodiment may be repaired by attaching them to the teeth and gingival portions as shown in FIG. In this case, it becomes possible to use CR having a low viscosity in order for the strips to serve as a bank that prevents the CR from flowing out. Further, since the gap between the pockets can be adjusted according to the shape of the strip, an appropriate gap can be easily provided. Thus, the present invention can be used not only for the restoration of the side surface of the interdental part but also for the restoration between the tooth and the gingival part.
[0051]
More specifically, the bonding material 4 is applied to the cavity portion 2. In this case, etching or washing with water may be performed as in the first embodiment. The strips are then attached to the part between the teeth and gums. At this time, the position of the strip is adjusted so that a pocket having an appropriate gap is formed. Thereafter, CR is filled between the strip and the cavity portion. Then, light is irradiated to polymerize and cure the strips and CR. Then, the strips 3 other than the cavity portion 2 are cut and removed.
[0052]
Note that the materials, materials, shapes, properties, and the like of the strips and the CR can be the same as those described in the first or second embodiment, and thus description thereof is omitted. Further, the repair procedure can be repaired by the same procedure as that described in the first embodiment or the second embodiment, and the description thereof will be omitted.
[0053]
Other embodiments.
In the above-described embodiment, strips are attached to the outer peripheral region of the cavity portion so as to surround the cavity portion, and CR is filled inside the portion surrounded by the teeth and the strips. And it is made to unite with CR by irradiating light. Although this is out of the use of the member called strips that has been used for the restoration of teeth conventionally, the name of the conventional strips is used in order to have the use of preventing CR and the like from adhering to adjacent teeth. It is only. Therefore, the name is not limited to strips, and any name may be used as long as it is a dental medical member that is integrated and fixed with CR. With the advent of such a dental medical member, if the outer shape of the restoration part is configured, fine adjustment between teeth can be easily performed. It is also possible to shorten the polishing time of the interdental portion after CR curing. Therefore, the dental medical member according to the present invention can treat the tooth decay between teeth or between teeth and gingiva with high accuracy in a short time.
[0054]
The dental treatment member as described above needs to have a certain degree of hardness and strength, and desirably has a higher viscosity than CR. Thereby, the external shape of a restoration part can be adjusted easily. Accordingly, the gap between the tooth and the restoration portion can be set to a desired interval. Furthermore, it is possible to prevent CR from flowing out in a liquid state. Or when CR with high adhesiveness is used, you may attach strips only to the part with a narrow space | interval with an adjacent tooth | gear. Note that a filling device or a filling device may be used for filling the CR.
[0055]
Further, visible light having a wavelength of 470 nm was used for polymerization of CR, but other wavelengths may be used, and ultraviolet light other than visible light may be used. In addition, methods other than light irradiation, such as heat polymerization and microwave polymerization, may be used. When using these polymerization methods, it is desirable to use materials suitable for them. The dental treatment member is not limited to a photocurable synthetic resin, and may be formed of a polymer material having a polymerizability, hybrid ceramics, or the like. In addition, the present invention can be used as long as it is a polymerizable monomer regardless of the filler content. Further, if a monomer that is substantially the same as the filling material is used for the strips, it can be easily integrated and fixed. Further, materials other than those shown in the embodiments may be used. Further, a filler containing a photocurable glass ionomer may be used.
[0056]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the hardening method of the dental treatment member and strips, and dental filling material which can perform a cavity part restoration | repair accurately in a short time can be provided.
[Brief description of the drawings]
FIG. 1 is a plan view of a peripheral portion of a cavity portion using strips according to a first embodiment of the present invention.
FIG. 2 is a plan view of the periphery of the cavity portion using the strips according to the first embodiment of the present invention.
FIG. 3 is a side view of a peripheral portion of a cavity portion using strips according to a third embodiment of the present invention.
FIG. 4 is a side view of a peripheral portion of a cavity portion using strips according to a third embodiment of the present invention.
FIG. 5 is a plan view of the periphery of a cavity portion using conventional strips.
[Explanation of symbols]
1 tooth, 2 cavity part, 3 strips 4 bonding material
5 Gingiva 6 Pocket
101 teeth, 102 cavity, 103 strips
104 Bonding material

Claims (2)

Attached to the outer peripheral area of the restoration part so as to surround at least a part of the restoration part of the tooth;
A dental treatment member for preventing the filling material filling the restoration part from flowing out,
Having a higher viscosity than the filler material,
A dental treatment member that adheres to the filling material by polymerizing and crosslinking together with the filling material by light irradiation . The dental treatment member according to claim 1, comprising the same polymerizable monomer as the filling material.

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