CN101466327A - Tooth for dental arch model and method of producing the same - Google Patents
Tooth for dental arch model and method of producing the same Download PDFInfo
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- CN101466327A CN101466327A CNA2007800221801A CN200780022180A CN101466327A CN 101466327 A CN101466327 A CN 101466327A CN A2007800221801 A CNA2007800221801 A CN A2007800221801A CN 200780022180 A CN200780022180 A CN 200780022180A CN 101466327 A CN101466327 A CN 101466327A
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Abstract
The present invention relates to a tooth which is used in a dental arch model with which dental students can experience dental works in the oral cavity and practice treatments. More specifically, the present invention relates to a tooth composition for formation trainings such as abutment tooth formation and cavity preparation. Since conventionally used dental arch models have a grinding sensation different from a natural tooth, dental students having completed formation trainings such as abutment tooth formation and cavity preparation by using these conventional models are frequently puzzled to have different grinding and handling properties upon dental works in the oral cavity in practice. That is, these conventional dental arch models are largely different from a natural tooth in grinding sensation including slipperiness and easiness in grinding. A tooth for a dental arch model simulating the enamel texture and the dentin texture constituting a natural tooth whereby even the difference in grinding sensation between the enamel texture and the dentin texture constituting a natural tooth can be reproduced by forming at least the enamel portion with the use of a sintered body of an inorganic powder such as alumina.
Description
Technical field
The present invention relates to be used for the tooth of dental arch model, use this tooth dentistry student can experience oral cavity inner teeth gear operation and practice therapeutic.Tooth for dental arch model is the tooth that is used for using intraoral treatment step of dental arch modeling or practice therapeutic in university.The present invention relates to be used for experience the tooth of formation training as abutment tooth formation and cavity preparation by the cutting tooth, and the method for making it.
Background technology
In tooth treatment exercise, use the tooth of transfering to from human body and animal traditionally to experience the cutting sense of natural tooth.Yet, exist and the relevant hygienic issues of transfering to of tooth, and if fully do not carry out health and control and infection may occur.Thereby can not freely train.In addition,, therefore cause spoilage problem, need pay close attention to storage because the tooth of transfering to comprises natural living materials.
Therefore, the demand that has the method for the cutting sense of experiencing tooth to can not using natural tooth.
Now, the tooth for dental arch model that is used for practice therapeutic in the oral cavity uses epoxy resin or melmac to make usually, and is knowing in the art.
Yet,, show the cutting sense different with natural tooth though the tooth for dental arch model that is formed by epoxy resin or melmac is the form of natural tooth.Therefore, even when forming training as abutment tooth formation and cavity preparation, the cutting sense is different with actual oral cavity inner teeth gear operation with operation, thereby can not obtain the training effect.
Particularly, epoxy resin and melmac are soft.Thereby have the excessively tendency of cutting, even and when using this model teeth to train, cutting also may be different with hard natural tooth.
In addition, natural tooth is formed by enamel tissue (enamel texture) and dentinal tissue (dentin texture), and enamel tissue and dentinal tissue are harder than resin, thereby have different hardness with its enamel tissue that covers the bizet of dentinal tissue with dentinal tissue.As a result, during cutting from the enamel tissue under the situation of dentinal tissue transition, may exceedingly cut dentinal tissue, thereby can not make tooth satisfactorily.
That is, to the transition portion of dentine portion, need the cutting sense to change similarly with natural tooth in enamel portion from tooth for dental arch model.Therefore much less, importantly the cutting sense of enamel tissue is reproduced by enamel portion, and the cutting sense of dentinal tissue is reproduced by dentine portion.
As the result who needs relatively hard materials, compound tooth is obtained commercially.Yet even under the situation of compound tooth, because dentine portion shows identical cutting sense with enamel portion, therefore the cutting sense of compound tooth is different with the cutting sense of natural tooth.Therefore, even when forming training as abutment tooth formation and cavity preparation, the cutting sense is different with the situation of the oral cavity inner teeth gear operation of reality with operation, thereby can not obtain the training effect.In order clearly to state problem, the cutting sense comprises smooth and is different substantially with natural tooth.
Open (Kokai) 1-90068 of Japanese unexamined utility model discloses: enamel organized layer forms by having the glass/ceramic that is controlled at Vickers (Vickers) hardness in 350 to 450 scopes, and it comprises the phlogopite crystal [NaMg that separates out simultaneously
3(Si
3AlO
10) F
2] and lithium oxide-alumina silica crystalloid (Li
2OAl
2O2SiO
2, Li
2OAl
2O
34SiO
2); The root of the tooth layer prepares in advance by following: add white, redness and xanchromatic coloring agent to polyhydric alcohol (base resin), mix with isocyanates prepolymer (firming agent), under vacuum condition, this mixture is injected master mold of silicone rubber, and solidify this mixture at normal temperatures; And be present in that thereby bonding two-layer dentinal tissue identification layer is formed by the adhering resin with body color between enamel organized layer and the tooth root layer.
Yet, the tooth that comprises the enamel organized layer that is formed by phlogopite crystal and lithium oxide-alumina silica crystalloid can not be fit to use well, this is to feel too hard because it is compared with natural tooth when cutting, and, therefore can not be fit to use well because the dentinal tissue identification layer time feels that too soft adhering resin forms by cutting.
In addition, the dentine layer that is formed by adhesive linkage is disclosed.It has been described and has formed and bonding adamantine layer portion and tooth root layer portion.Think that it is the dentine layer that is formed by thick adhesive linkage.
Open (Kokai) (hereafter is " the JP-A-") 5-224591 of Japanese unexamined patent discloses has the tooth model that extremely similarly cuts sense with natural tooth, and this tooth model is suitable for the training of actual teeth cutting.
This tooth model comprises that its surface has the tooth crown of Nu Shi more than at least 70 (Knoop) hardness and the tooth root portion that its surface has at least 10 to 40 Knoop hardnesses.As main component, this tooth model contains inorganic material powders and the crosslinked resin of weight ratio 20%:80% to 70%:30%.
Above-mentioned prior art discloses: " consider the method and the economic consideration that are used to make tooth model, tooth model can be by the raw material with any hardness for example metal, pottery or resin formation, or can be the nest hole ".Yet this is not to show the different tooth model of cutting sense between enamel portion and the dentine portion.
JP-A-5-216395 discloses a kind of tooth model and has made its method, and this tooth model has and extremely similarly cut sense with natural tooth and be suitable for training actual tooth to cut.As main component, this tooth model contains the hydroxyapatite with 40 to 80% porositys (hydroxyapatite) powder and (methyl) acrylic resin of weight ratio 20%:80% to 50%:50%.Yet this is not to show the different tooth model of cutting sense between enamel portion and the dentine portion.
JP-A-5-241498, JP-A-5-241499 and JP-A-5-241500 have described a kind of inorganic filler and hydroxyapatite (hydroxyapatite) filler.Yet, in these open cases, in disclosed all tooth models, resin is used as base material, thereby the problem of unresolved cutting sense.They are not to show the different tooth model of cutting sense between enamel portion and the dentine portion.
JP-A-2004-94049 has described provides the invention of tooth training with model teeth, and it can carry out accurate shape measure by enough laser beams.
Description discloses: " known materials can be used as the material on the tooth crown surface that constitutes model teeth of the present invention, and they can use following material: ceramic material such as pottery; Thermoplastic resin material such as acryloyl group, polystyrene, Merlon, acrylonitrile-styrene-butadiene copolymer (ABS), polypropylene, polyethylene and polyester; Thermoset resin material such as tripolycyanamide, carbamide, unsaturated polyester (UP), phenol and epoxy resin; And by adding the material of various organic and inorganic reinforcing fibers (for example glass fibre, carbon fiber, paper pulp, synthetic resin fiber etc.), various filler (for example Talcum, silicon dioxide, Muscovitum, calcium carbonate, barium sulfate, aluminium oxide etc.), coloring agent (for example pigment, dyestuff etc.) and various additive (for example air slaking agent, antistatic additive etc.) gained to these main materials ".Yet, there is not description about preferred material, thereby the problem of unresolved cutting sense.
As the result of research, the inventor finds: need to use the sintered body of inorganic material, to show the cutting sense of natural tooth.Because the difficulty on the hardness of control inorganic material is difficult to form enamel portion and dentine portion in control hardness.
The density and grain shape and the sintering temperature that need the control sintered body are so that regulate the cutting sense of sintered body.Shrinkage factor during sintering between enamel portion and the dentine portion and the difference of thermal coefficient of expansion cause fragmentation, peel off and break.In addition, may form the gap between enamel portion and the dentine portion.Thereby, chip may occur during cutting, and the gap gives the sensation different with the cutting sense of natural tooth.Thereby the gained tooth can not be suitable for using well.
When the natural tooth of cutting, distinctive tough and tensile cutting sense when obtaining the cutting live body.Especially, dentine portion shows that significantly the organic principle that contains in the dentinal tubule of tooth adheres to the sensation of bar (bar) and the sensation that suppresses cutting.
Although after deliberation the whole bag of tricks to obtain the distinctive tough and tensile cutting sense of natural tooth, be to use resin, composite etc. can not obtain cutting sense fully, and when water filling on traditional tooth for dental arch model, can not obtain this sensation.Need such cutting sense, even wherein because similar phenomenon user under the situation of enamel tissue is also felt the cutting sense more tough and tensile than the cutting sense of inorganic material.
Yet the method that the concrete composition and being used to of tooth model that can realize the cutting sense of the enamel tissue of natural tooth and dentinal tissue is made it is research or report all.
The also untapped up to now method that goes out to reproduce the distinctive dental pulp of natural tooth, thereby the dentistry student can not experience the dental pulp exposure.It is most important technology in the dental treatment that dental pulp exposes (along the cutting of dental pulp portion).Under the situation of carrying out the dental pulp exposure mistakenly, must learn processing method subsequently simultaneously.
When dental caries developed in natural tooth, treatment position expanded adamantine layer, dentine layer and dental pulp to, and was most important to the training of root canal such as pulpectomy.When carrying out pulpectomy, owing to remove dental pulp, change fully with the sensation on reamer friction dentin wall surface by reamer, therefore can not carry out the training that the root pipe is filled.
In the treatment of dental pulp, use tooth, and use the training (root pipe cleaning, root enlargement of pipe etc.) of carrying out root canal by tooth with aperture that box-like acryloyl group (box-shaped acryl) forms as root canal training design.Yet, can not train fully, this is because can not be installed to tooth on the jaw and the stiffness changing of dentinal tissue.
The tooth for dental arch model that needs exploitation can carry out these experience.Especially, dentistry student with hands study root pipe cleaning during dental pulp whether move on to the sensation of apical foramen of tooth fully, thereby be difficult to the abecedarian.Therefore, need to use the tooth for dental arch model that wherein reproduces the dental pulp in the natural tooth to train.
Although removing dental caries in tooth treatment is important disposal, dental caries portion is softer than common dentine portion, thereby is difficult to cut dental caries portion.Therefore, need to use the tooth for dental arch model that wherein reproduces the dental caries in the natural tooth to train.Also need to develop the method that affirmation has accurately been removed dental caries portion.
Summary of the invention
The purpose of this invention is to provide tooth for dental arch model, it can be experienced and treat natural tooth and similarly feel.Particularly, the purpose of this invention is to provide tooth for dental arch model, wherein reproduce the enamel tissue of natural tooth and the difference of the cutting sense between the dentinal tissue in tooth for dental arch model, it comprises enamel portion and dentine portion.
The invention provides tooth for dental arch model, it comprises enamel portion and dentine portion, and wherein enamel portion is formed by the sintered body of inorganic powder.
According to intended purposes, dentine portion is formed by sintered body, resin, composite, binder material (cement material) or the Gypsum Fibrosum of inorganic powder.
Can make the similar of cutting sense and natural tooth from the sintered body formation enamel portion of inorganic powder, and pass through the composition of change dentine portion, can give the cutting sense different with enamel portion.
A first aspect of the present invention is the tooth for dental arch model that comprises enamel portion and dentine portion, and wherein enamel portion and dentine portion are formed by the sintered body of inorganic powder.
In tooth for dental arch model as a first aspect of the present invention, enamel portion and the molding integratedly of dentine portion.When enamel portion and the molding integratedly of dentine portion, can use material to make two parts molding with same composition.
When enamel portion and dentine portion use when having the forming materials of different compositions separately, can two parts are directly bonding, or enamel portion and dentine portion can to pass through adhesive linkage bonding.
A second aspect of the present invention is the tooth for dental arch model that comprises enamel portion and dentine portion, and wherein enamel portion is formed by the sintered body of inorganic powder, and dentine portion is formed by resin, composite or binder material.
The powder of inorganic material such as aluminium oxide, zirconium oxide, titanium oxide and silicon dioxide can be used for tooth for dental arch model of the present invention, but be not limited thereto, can use various inorganic powders and composition thereof.
Can be with by above-mentioned resin and composite inorganic or that organic dust is mixed be used for tooth for dental arch model of the present invention.
Can will contain polyacrylic acid and aluminosilicate, can cause solidified binder material by powder-liquid mixing and be used for tooth for dental arch model of the present invention as main constituent.
Gypsum Fibrosum can be used for tooth for dental arch model of the present invention.
In tooth for dental arch model of the present invention, when enamel portion and dentine portion form by the sintered body of inorganic powder, can be with ceramic bonding material or glass as the bonding agent that constitutes adhesive linkage.
In the present invention, preferably use ceramic injection forming (CIM) technology, to form enamel portion and dentine portion with inorganic powder injection moulding.
This tooth for dental arch model is the substitute that is used for the hardest natural tooth of human body, and when cutting the soft sensation of tooth demonstration that forms by traditional material, yet, can realize similarly cutting sense according to tooth for dental arch model of the present invention with natural tooth.Can experience and, similarly cut during diamond cutting material in the oral cavity of the high speed rotating of 000rpm (use air turbine) and feel when using with 400.
Because injection molded article contacts with the cutting material that rotates under high speed, so the adaptability between tooth and the jaw is important.Owing to also need adaptability between enamel and the dentine, the CIM technology that therefore preferred use can precise forming.
The shape of the crown of tooth model also is important, and importantly is used as the target of abutment tooth formation and cavity preparation, and accurately shows protrusion, nest and cusp, thereby the molding of use CIM technology is suitable.
The invention provides the method that is used to make tooth for dental arch model, when enamel portion and dentine portion form by the sintered body of inorganic powder, this method may further comprise the steps: use CIM technology injection moulding enamel portion and dentine portion, make the gained injection molded article carry out defat and sintering step obtaining the sintered body of dentine portion and enamel portion, and use bonding these sintered bodies of bonding agent.
The present invention also is provided for making the method for tooth for dental arch model, when glass is used as bonding agent, this method may further comprise the steps: use CIM technology injection moulding enamel portion and dentine portion, use places these injection molded articles of glass powder lamination between enamel portion and the dentine portion, makes the gained laminate carry out defat and sintering step to obtain the wherein bonding sintered body of dentine portion and enamel portion.
In the present invention; in order to give the cutting powder that disperses when tooth cuts with distinctive tough and tensile cutting sense of natural tooth and minimizing in enamel portion or dentine portion; enamel portion that will form or dentine portion polysaccharide and proteinic aqueous solution by the sintered body of inorganic powder; hot melt material such as wax, or resin such as acryloyl group resinoid, urea resin or silicone resin dipping.
When with the situation that does not have dipping when comparing, can obtain and the similar soft cutting sense of natural tooth with thermosetting resin or the resin dipping that contains cross-linking agent.When flooding, when not comparing, obtain similarly to twine the cutting sense of sensation with natural tooth with this resin dipping with thermosetting resin.Even these resins do not dissolve when making water simultaneously yet, thereby can reproduce to twine and feel.Although the present invention can be applied in dentine portion and the enamel portion, especially preferably apply it to dentine portion.
In tooth for dental arch model of the present invention, can in dentine portion, form dental pulp portion.Dental pulp portion fills with resin, silicone rubber, wax or water-soluble material.
In tooth for dental arch model of the present invention, can be between enamel portion and dentine portion or in its peripheral doubtful dental caries portion (false carious dental portion) that forms.Doubtful dental caries portion is formed by the sintered body of resin or inorganic powder.
According to the present invention, owing in dentine portion and enamel portion, all obtain similarly to cut sense with natural tooth, and similar from enamel portion to the cutting sense and the natural tooth of the transition of dentine portion, even the therefore training that when using a model, also can easily cut natural tooth.
According to the present invention,, also can experience the cutting of natural tooth model and the soft sensation that do not cause by the existence of bonding agent even when dentine portion and enamel portion form by the sintered body of inorganic powder.Can experience level and smooth cutting from enamel portion to dentine portion.
The tooth for dental arch model of the application of the invention forms abutment tooth and nest hole, can experience apace with natural tooth and similarly cut sense, and experience formation easily.Can grasp this formation technology apace.
Because the sintered body of inorganic powder floods with cohesive material such as resin, therefore tooth for dental arch model of the present invention has the effect that dust disperses when reducing the tooth cutting, thereby can suppress because the stain that the dust of model causes.As tangible result, the dust that also reduces the training period student sucks.Because tooth for dental arch model of the present invention has and the similar tough and tensile cutting sense of natural tooth, the winding sensation that produces in the time of therefore can reproducing cutting live body tooth to diamond rod (diamond bar).
Also can experience the technology of root canal or dental caries treatment by on tooth of the present invention, forming dental pulp portion or doubtful dental caries portion.
Description of drawings
Fig. 1 is the sectional view that tooth for dental arch model according to a first aspect of the invention is shown.
Fig. 2 is the sectional view that tooth for dental arch model according to a second aspect of the invention is shown.
Fig. 3 is the zoomed-in view that the sintered body of inorganic powder is shown.
Fig. 4 is the sectional view that illustrates according to the tooth for dental arch model that comprises dental pulp portion of first aspect present invention.
Fig. 5 is the sectional view of tooth for dental arch model that illustrates according to comprising of second aspect present invention of doubtful dental caries portion.
Fig. 6 is the sectional view that illustrates according to the tooth for dental arch model of the dental pulp portion that comprises of first aspect present invention and doubtful dental caries portion.
The specific embodiment
Tooth for dental arch model of the present invention comprises enamel portion 1 and dentine portion 2 at least, and enamel portion 1 is formed by the sintered body of inorganic powder.According to intended purposes, dentine portion 2 is formed by sintered body, resin, composite, binding agent or the Gypsum Fibrosum of inorganic powder.
Fig. 1 illustrates tooth for dental arch model, and wherein enamel portion 1 and dentine portion 2 form by the sintered body of inorganic powder, and enamel portion 1 and dentine portion 2 are bonding by adhesive linkage 3.Adhesive linkage 3 is made up of bonding agent such as organic resin combination, ceramic bonding material or glass.
When enamel portion 1 is formed by the sintered body of inorganic powder and dentine portion 2 when being formed by resin, composite, binding agent or Gypsum Fibrosum, need not adhesive linkage (Fig. 2).
In the present invention, in the sintered body of the inorganic powder 10 that constitutes enamel portion 1 and dentine portion 2, as shown in Figure 3, between the granule 11 of inorganic powder, there is space 12.Therefore, by with comprising polysaccharide or proteinic water-soluble material, hot melt material such as wax, or resin such as acryloyl group resinoid, urea resin or silicone resin dipping space 12 can be reproduced and the similar tough and tensile cutting sense of natural tooth.
In tooth for dental arch model of the present invention, can in dentine portion 2, form dental pulp portion 4 (Fig. 4).
In order in dentine portion 2, to form dental pulp portion 4, use flammability material such as epoxy resin to form mould with required dental pulp shape.The mould that will have the dental pulp shape is arranged in the mould, and dentine portion 2 is formed by inorganic powder.Sintering dentine portion, thus mould burnt with dental pulp shape, to obtain in dentine portion 2, to comprise the sintered body of spatial dentine portion with dental pulp shape.Fill with resin, silicone rubber, wax or water-soluble material in the space of the gained dental pulp shape in gained dentine portion 2, to form dental pulp portion 4.
In tooth for dental arch model of the present invention, can between enamel portion 1 and dentine portion 2 or at its edge, form doubtful dental caries portion 5.Fig. 5 is the sketch map that forms doubtful dental caries portion 5 in the transition part office according to the enamel portion 1 of the tooth for dental arch model of second aspect and dentine portion 2.As shown in Figure 6, can form doubtful dental caries portion 5 and pierce through dentine portion with the occlusal surface from enamel portion, and under the situation according to the tooth for dental arch model of first aspect, doubtful dental caries portion 5 can form with dental pulp portion 4.
Doubtful dental caries portion 5 is formed by sintered body, resin or the composite of inorganic powder.When doubtful dental caries portion 5 is formed by resin or composite, can visually confirm the removal degree of dental caries portion to sintered body, resin or the composite of inorganic powder by adding coloring agent, fluorescent material or x-ray contrast agent.
Because tooth for dental arch model of the present invention can become painted white, ivory white, milky or the edematus of similar natural tooth by using inorganic pigment, therefore may experience cutting more true to nature.Color preferred white, ivory white or milky.
In tooth for dental arch model of the present invention, can suitably select jaw zone and anthropometric dummy portion.Dispose to confirm that the well-formedness of selecting is important.For example, the size inserted mouthful of the tooth of suitably adjusting the dental arch model is important.
The example that can be used to form the inorganic powder of enamel portion 1 of the present invention and dentine portion 2 comprises the powder of alumina type, zirconium oxide class, silica-based, aluminium nitride and silicon nitride ceramics or glass.In these, the powder of alumina type, zirconium oxide class pottery is preferred.
Alumina type or zirconium oxide class pottery refer to aluminium oxide or zirconic content is 60 to 100%, and be preferred 80 to 100%, and more preferably 95 to 100%, based on the composition of sintered body.Especially, the content of aluminium oxide is 50 to 100%, and is preferred 70 to 100%, more preferably 90 to 100%.
Preferably the powder with the alumina type pottery is used as inorganic powder.
When enamel portion and dentine portion form by the sintered body of inorganic powder, the hardness of enamel portion and dentine portion is adjusted by the following method: increase the method for the method of particle diameter, the method that increases the space, the method that changes composition, change sintering temperature, or change the method for the time of staying.Optimal method is the method that changes particle diameter when keeping same composition.When comparing, can increase the particle diameter of dentine portion with enamel portion.
The preferred mean diameter of adjusting dentine portion is to the mean diameter than big at least 10 times of the mean diameter of enamel portion.When the mean diameter of enamel portion was 0.1 to 0.5 μ m, the mean diameter of dentine portion preferably was adjusted in the scope of 1.0 to 10.0 μ m.
Sintering temperature depends on composition and changes.Sintering temperature is 800 to 1,200 ℃ when containing a large amount of glass ingredients such as silicon dioxide.Under the situation of aluminium oxide, sintering temperature is 1,200 to 1,600 ℃, is preferably 1,400 to 1,550 ℃.
Enamel portion and dentine portion are all preferably formed by agglomerating alumina powder.In the case, preferred 0.2 to the 5 μ m of the primary particle size of alumina powder.Preferred sintering under 1,300 to 1,600 ℃ sintering temperature.
The choosing of enamel quality award from the ministry is by the sintering Al with 0.1 to 1.0 μ m primary particle size
2O
3Powder more preferably has the sintering Al of 0.2 to 0.5 μ m primary particle size
2O
3Powder forms.
The choosing of dentine quality award from the ministry is by the sintering Al with 0.1 to 8.0 μ m primary particle size
2O
3Powder more preferably has the sintering Al of 2.0 to 5.0 μ m primary particle sizes
2O
3Powder also more preferably has the sintering Al of 2.0 to 3.0 μ m primary particle sizes
2O
3Powder forms.
Preferred 1,400 to 1,600 ℃ of the sintering temperature of enamel portion, and preferred 1,300 to 1,500 ℃ of the sintering temperature of dentine portion.Sintering temperature has confidential relation with the cutting sense, and it must be according to particle diameter or raw material lot adjustment.Similarly, the time of staying under sintering temperature also has confidential relation with the cutting sense, and it must be according to particle diameter and raw material lot adjustment.
The Vickers hardness of enamel portion and dentine portion is preferred 300 to 1,000, and more preferably 300 to 600.
Only otherwise the cutting sense of infringement alumina sintered body, metal-oxide such as silicon dioxide can be added to during tooth forms.
The CIM technology is the technology of formation inorganic powder and may further comprise the steps:
(1) aluminium oxide and binding agent (its thermal decomposition under about temperature below 1,000 ℃) are mediated to form bead;
(2) make and to have given shape and be used for injection molding mould, and the bead injection moulding that will in step (1), obtain;
(3) remove binding agent by defat (decomposing adhesive component) after the molding by elevated temperature; And
(4) at the injection molded article of predetermined sintering temperature defat, to obtain desired sintered body.
The example that can be used for binding agent of the present invention comprises stearic acid, polyvinyl alcohol, thermoplastic resin and wax.Preferred stearic acid or the polyvinyl alcohol of using.
When the particle diameter that changes inorganic powder when reproducing the difference of the cutting sense between enamel portion and the dentine portion, in defat by occurring the difference of shrinkage factor during with the bead of inorganic powder and binding agent kneading formation and this bead process of sintering.When molding and sintering have the injection molded article of multiple structure of enamel portion and dentine portion,, thereby can not realize bonding fully because the difference of shrinkage factor be full of cracks occurs at the boundary of enamel portion and dentine portion.
Therefore, when formation had the sintered body of layer structure of enamel portion and dentine portion, it was bonding fully to realize to consider that shrinkage factor is made mould.Yet it is also remarkable and easy.
Shrinkage factor can be adjusted by the following method: the method for the amount of binding agent during the change making bead changes the method for sintering temperature, or changes the method for the time of staying.Even it is when enamel portion and dentine portion are formed by the inorganic powder that has different-grain diameter separately, bonding fully by two-part shrinkage factor unanimity also can be realized.Optimal method is the method that changes amount of binder.
Use the CIM technology to make enamel portion 1 and 2 injection mouldings of dentine portion, after defat and sintering step, can carry out bonding in resin of use at the interface or ceramic bonding agent between agglomerating enamel portion and the agglomerating dentine portion.
As being used for bonding resin in the present invention, can use for example thermoplastic resin, thermosetting resin or chemical polymerization resin.In these resins, preferred thermosetting resin and chemical polymerization resin.
The purpose that thermoplastic resin refers to for molding enough obtains sufficient thermoplastic resin by applying heat energy.
The instantiation that can be used in thermoplastic resin of the present invention comprises acryloyl base class, phenylethylene, olefines, polyvinyl chloride-base, polyurethanes, polyamide-based, polybutadiene, polyacetals, unsaturated polyester esters, Merlon and polyphenylene oxide resin.
Can also suitably use polysulfones, polyimides, Polyetherimide and polyether-ether-ketone resin.In these resins, the acryloyl group resinoid is particularly preferred.
Thermosetting resin refers to the resin by being heating and curing as the crosslinked result who carries out.Because be used among the present invention being not dissolved in solvent after the bonding thermosetting resin processing, even and not softening when heating once more yet, so thermosetting resin is better than thermoplastic resin.
Typically can use urea resin, melmac, phenolic resins and epoxy resin, and melmac and epoxy resin are preferred.In these, epoxy resin is most preferred.
Even the chemical polymerization resin refers to when it and is included at first in thermosetting resin or the thermoplastic resin, use the also polymerisable resin of chemical catalyst.It is particularly preferred containing cross-linking agent and not having thermoplastic chemical polymerization resin.
Be used for bonding ceramic bonding agent in the present invention and be containing silicic acid and boric acid as main component and have stable on heating bonding agent more than the sintering temperature of pottery.
Need among the present invention bonding be bonding with enamel portion and dentine portion integral adhesive.Therefore, adhesive linkage partly contains the non-bonded part branch and a large amount of bubble existence is not preferred, and this is apply adverse effect because can feel cutting.
Use the CIM technology, make enamel portion 1 and 2 injection mouldings of dentine portion respectively, and, then carry out defat and sintering step, thereby make it can obtain the wherein bonding sintered body of dentine portion and enamel portion by these injection molded articles of glass powder lamination.
When being used for the bonding bed thickness of bonding enamel portion and dentine portion, feel the difference of cutting sense to the transition period of dentine portion from enamel portion.As a result, the gained tooth model is very different with natural tooth.
In tooth for dental arch model of the present invention, preferred 1 to the 500 μ m of the thickness of bonding agent, more preferably 1 to 300 μ m, more preferably 1 to 200 μ m also is further more preferably 1 to 100um.
When thickness reduced, cutting carried out the transition to dentine portion from enamel portion easily, thereby the cutting sense is similar with natural tooth.
The resin that is used to form dentine of the present invention portion comprises thermosetting resin and thermoplastic resin.Thermoplastic resin is preferred with the resin that contains cross-linking agent.More preferably epoxy resin.
The purpose that thermoplastic resin refers to for molding enough obtains sufficient thermoplastic resin by applying heat energy.
The instantiation that can be used for forming the thermoplastic resin of the enamel portion among the present invention comprises acryloyl base class, phenylethylene, olefines, polyvinyl chloride-base, polyurethanes, polyamide-based, polybutadiene, polyacetals, saturated polyester class, Merlon and polyphenylene oxide resin.In these resins, acryloyl base class, phenylethylene, polyurethanes and polyamide-based resin are particularly preferred.
Preferred aspect about thermosetting resin can obtain by thermoplastic resin is mixed with cross-linking agent.That is, can carry out the training of tooth cutting and heat of solution that resin is produced when cutting.
Thermosetting resin refers to the resin of result by being heating and curing that carries out as polymerization.
After the curing, even because it is not dissolved in the solvent and is also softening when heating once more, so thermosetting resin is better than thermoplastic resin.
The thermosetting resin that can be used for forming dentine of the present invention portion comprises urea resin, melmac, phenolic resins and epoxy resin.Preferred melmac and epoxy resin.Epoxy resin most preferably.
Also can use by with resin and composite inorganic or that organic dust is mixed with, feel to improve cutting.
Inorganic powder mainly is made up of pottery or glass, and has the mean diameter of 1.0 to 100 μ m, does not limit especially but should form.Preferred 1.0 to the 30 μ m of mean diameter.Also can mix the particulate filler.
The instantiation of inorganic powder comprises the powder of inorganic material as quartz, amorphous silica, clay, aluminium oxide, Talcum, Muscovitum, Kaolin, glass, barium sulfate, zirconium oxide, titanium oxide, silicon nitride, aluminium nitride, titanium nitride, carborundum, Norbide., calcium carbonate, hydroxyapatite and calcium phosphate.The instantiation of organic dust comprises the powder of polymer or oligomer such as polymethyl methacrylate, polyethyl methacrylate, polrvinyl chloride, polystyrene, polyester and nylon.Also can preferably use composite organic-inorganic material.
These powder can be used alone or in combination.More preferably use and come the surface-treated powder with conventionally known titanate coupling agent, aluminate coupling agent and silane coupler.If desired, can suitably select mixing ratio, can from 1 to 95%, preferably from 60 to 90% scope is selected.
The mean diameter of these inorganic powders and organic dust is 0.1 to 30 μ m, preferred 1.0 to 10 μ m, more preferably 1.0 to 5.0 μ m.
The binder material that constitutes dentine portion solidifies by power liquid (power liquid) mixing, and contains polyacrylic acid and aluminosilicate as main component.
Although natural tooth has x-ray imaging, the tooth model that is formed by the inorganic sintered body does not have x-ray imaging, thereby preferably gives enamel portion and dentine portion with x-ray imaging.X-ray imaging can by with SrO, BaO, ZnO, ZrO
2, La
2O
3Mix with other heavy metal element oxide and obtain.
The state of nest hole shape can be photographed with x-ray imaging use X ray and confirms by giving dentine portion after a while.Cutting state when cutting enamel and dentine can will be found with enamel portion and dentine portion blended metal change x-ray imaging by using.
Between the sintered particles of the sintered body that constitutes inorganic powder, there is space part.Therefore, tooth for dental arch model of the present invention is characterised in that space part floods with water-soluble material, hot melt material or organic material.
Can use any water-soluble material and not have any restriction, as long as it is water-soluble polymer that can impregnation sintering body space with it.Preferred use at least a in polysaccharide or the protein.In these, protein is preferred.
When flooding, wave effect by water filling or pre-soaked waterishlogging with water-soluble material.
Preferably dextrin, glycogen, cellulose, pectin, konjacmannan (konjakmannan) and glucomannan and alginic acid are used as polysaccharide.In these, cellulose, pectin, konjacmannan and glucomannan are preferred, and this is because need certain viscosity.
Protein can be the macromolecular compound of mainly being made up of the polypeptide that comprises about 20 kinds of L-a-amino acids.Consider composition, the preferred use only by aminoacid simple protein of forming and the conjugated protein that contains nucleic acid, phosphoric acid, lipid, saccharide and metal.More preferably gelatin, agar class material, ossein and elastin laminin.Also more preferably gelatin, agar class material, this is because these materials not only dissolve easily in water, and must keep shape at the space part of sintered body.
Can use wax class material as hot melt material with its dipping space part.
When with the hot melt material soaking, the frictional heat that produces during by cutting is dissolved and is brought into play effect.Need not performance of water filling wax and polysaccharide or protein similar effects, and need not to use water injection equipment just can easily carry out the training of tooth cutting.
Native paraffin and synthetic wax all can be used as wax.The representative instance of native paraffin comprises animal/vegetable wax, mineral wax and pertroleum wax.As synthetic wax, can use blend wax and Tissuemat E, and preferred paraffin wax.Fat and oil are also included within the wax.Fat and oil refer to the glyceride of fatty acid, and water fast but be dissolved in the alcohol.In the fatty down and oily form that is preferably solid-state fat of room temperature (37 ℃, atmospheric pressure), and the example comprises plant Japan fat (vegetable Japan tallow), animal Adeps Bovis seu Bubali and leaf fat.Particularly, can use lauric acid, myristic acid, Palmic acid, mountain Yu acid, stearic acid and the fat that from live body, extracts and oily, the fat that preferably from live body, extracts and oily.In these, fat and the oil (for example leaf fat, Adeps Bovis seu Bubali etc.) that extracts from live body is particularly preferred.
When dipping, can help dipping by mixed surfactant.That is, the auxiliary agent of surfactant plays an important role, with the space part with water-soluble material or hot melt material soaking sintered body.
Surfactant also can be used as water-soluble material.
Can suitably use anion, nonionic, cation and amphoteric surfactant.In these surfactants, anion and non-ionic surface active agent are preferred.As anion surfactant, use soap (soap) C
11H
23COONa, the alpha-sulfo fatty acid ester salt (C of α-SFE)
10H
21-CH (SO
3Na) COOCH
3, alkylbenzenesulfonate (ABS) C
12H
25-(C
6H
4) SO
3Na, alkyl sulfate (AS) [higher alcohols] C
12H
25-OSO
3Na, alkyl ether sulphate salts (AES) C
12H
25-O (CH
2CH
2O)
3SO
3Na, and triethanolamine alkyl sulfate C
12H
25-OSO
3 - +NH (CH
2CH
2OH)
3
As non-ionic surface active agent, use fatty diglycollic amide C
11H
23-CON (CH
2CH
2OH)
2, polyoxyethylene alkyl ether (AE) C
12H
25-O (CH
2CH
2O)
8H and polyoxyethylene alkyl phenyl ether (APE) C
9H
19-(C
6H
4) O (CH
2CH
2O)
8H.
As cationic surfactant, use alkyl trimethyl quaternary ammonium salt C
12H
25-N
+(CH
3)
3Cl
-, dialkyl dimethyl ammonium chloride C
12H
25-N
+(C
8H
17) (CH
3)
2Cl
-With alkyl pyridinium chloride C
12H
25-(N
+C
5H
5) Cl
-
As amphoteric surfactant, use alkyl carboxylic acid betanin (betaines) C
12H
25-N
+(CH
3)
2CH
2COO
-
Method with water-soluble material or hot melt material soaking will be described now.
Pack into the water-soluble material of dipping or hot melt material in the beaker and be heated to suitable temperature, thereby reduce viscosity.Add an amount of surfactant.After reducing viscosity, ceramic sintered bodies is put into beaker, and beaker is positioned in the vacuum desiccator.Extract the air in the vacuum desiccator gradually out, thereby the air in the ceramic sintered bodies is discharged to the outside of vacuum desiccator.Along with the progress of finding time, bubble formation is on the surface of sintered body, thereby discovery is extracted the air in the sintered body out.Finish deflate after, flood by little by little making air turn back to exsiccator.
Flood the preferred thermosetting resin of organic material, the thermoplastic resin of space part of the present invention and contain at least a in the resin of cross-linking agent with it.
The resin that is used to flood in the present invention comprises thermosetting resin and thermoplastic resin.Preferred thermosetting resin or contain the resin of cross-linking agent.In addition, preferred epoxy.
In tooth for dental arch model of the present invention, the method that forms dental pulp portion 4 in dentine portion 2 may further comprise the steps:
(1) use flammability material molding to have the flammability dental pulp mould making step of the mould of dental pulp shape;
(2) the mould that flammability dental pulp mould is set of the pre-position in dental mold is provided with step;
(3) in dental mold, inject inorganic powder and binding agent to obtain the injecting step of non-sintering injection molded article;
(4) the non-sintering injection molded article of sintering is to obtain to merge the sintering step of the spatial sintered body with dental pulp shape; And
(5) inside that resin, silicone rubber, wax or water-soluble material is filled in sintered body has the dental pulp making step in the space of dental pulp shape.
It is the step of dental pulp shape with the dental pulp shape of formation tooth for using the flammability material to be pre-formed when the sintering tooth that use flammability material makes the flammability dental pulp of the flammability material dental pulp shaping that forms the dental pulp shape form step.
Owing to make the tooth that forms by inorganic material carry out sintering step, form the space with the flammability material during the sintering step, then this space is filled to finish tooth with the material that is suitable for dental pulp.This step forms step for the dental pulp shape.
The mould that pre-position in dental mold is provided with flammability dental pulp mould is provided with step for the step of flammability dental pulp mould is set in mould.The flammability dental pulp mould that is formed by the flammability material in advance can be arranged in the mould, maybe the flammability dental pulp mould that the original place at the flammability material can be formed continuously is arranged in the mould once more.
Inorganic powder and binding agent injection dental mold will be had inorganic powder and the blended step of binding agent that tooth is formed with the injecting step that obtains the injection moulding tooth for wherein heating the dental mold with the flammability dental pulp mould that is formed by flammability material utilization.In this step, because flammability dental pulp mould is thin, must be careful when therefore injecting.
In the present invention, because tooth is divided into enamel portion and dentine portion, only form dentine portion.When making tooth molding integratedly, can use this step in addition by application the present invention.
The step of the non-sintering tooth that non-agglomerating injection molded article sintering is obtained in injecting step for sintering wherein with the sintering step that obtains to have the spatial sintered body that wherein has the dental pulp shape.Sintering temperature when containing a large amount of glass ingredient in the sintering step is 800 to 1,200 ℃.Under the situation of aluminium oxide, sintering temperature is 1,200 to 1600 ℃, preferred 1,400 to 1,550 ℃.At this moment, flammability dental pulp mould is burnt the space that has the dental pulp shape with formation.
Being filled in the spatial dental pulp manufacture method that has the dental pulp shape in the sintered body with resin, silicone rubber, wax or water-soluble material is to use resin, silicone rubber, wax or water-soluble material to form the step of doubtful dental pulp in the spatial portion office of sintering dental pulp.The example of this method comprises the method for using syringe to fill, and by immersing in the doubtful pulp material and being positioned in the Dewar vessel, the doubtful pulp material of the usefulness of finding time is then filled the method for the dental pulp portion of sintered body.
The flammability material can be such material, and it can form the dental pulp shape, and is indeformable under injection pressure and injection temperature when tooth forms, and is the combustible space that has the dental pulp shape with formation during the sintering tooth.This flammability material is in particular resin, preferred especially thermosetting resin.Particularly, can use urea resin, melmac, phenolic resins and epoxy resin, and crosslinked acryloyl group resinoid and styrene resin.
The resin of the dental pulp portion in the ceramic sintered bodies of tooth for dental arch model of the present invention comprises elastomer resin, foamed resin, thermosetting resin, thermoplastic resin and contains more than one resin of the resin of cross-linking agent, and preferred elastomer resin or foamed resin.
The resin that is used for dental pulp of the present invention portion comprises thermosetting resin and thermoplastic resin.Preferred thermosetting resin or contain the resin of cross-linking agent.In addition, preferred epoxy.
The instantiation that is used for the thermoplastic resin of dental pulp of the present invention portion comprises acryloyl group resinoid, styrene resin, olefine kind resin, vinyl chloride resin, polyurethanes resin, polyamide-based resin, polybutadiene resinoid, polyacetals resin, saturated polyester resin, Merlon, polyphenylene oxide, rubber, vinyl-based resin and polyvinyl acetate.Elastomer resin and foamed resin such as polyurethane and rubber are particularly preferred.
The thermosetting resin that is used for dental pulp of the present invention portion comprises urea resin, melmac, phenolic resins and epoxy resin, and melmac and epoxy resin are preferred.Epoxy resin is most preferred.
Preferred chemical polymerization resin.Reason is to use the particulate space part and the cured resin of resin impregnation sintering body easily.
The chemical polymerization resin is initially, and promptly is the resin that is included in thermosetting resin or the thermoplastic resin, uses the also polymeric resin of chemical catalyst.Particularly preferred resin is to contain cross-linking agent and do not have thermoplastic resin.
Any silicone rubber can be used in the dental pulp portion of ceramic sintered bodies of tooth for dental arch model of the present invention and not have any restriction.The example of other spendable elastomeric material comprises CSM; Hypalon (Hypalon) rubber, fluorubber and butyl rubber; Butyl rubber, natural rubber and acrylonitrile-butadiene rubber: Hiker rubber, polyurethane rubber, EP rubbers, SBR styrene butadiene rubbers and chloroprene rubber; And neoprene.Rubber hardness (durometer (JIS K 6253)) is 10 to 70, preferred 20 to 50.
As the wax of the dental pulp portion in the ceramic sintered bodies of tooth for dental arch model of the present invention, can use the wax (Cera Flava, spermaceti, shellac wax etc.) that for example is derived from animal, plant-derived wax (Brazil wax, Japan wax (Japan tallow), rice bran wax (rice wax), candelilla wax etc.), be derived from oil wax (paraffin wax, microwax etc.), be derived from wax (montan wax, ceresine etc.), the synthetic wax (Fischer-Tropsch (Fisher-Tropsch) wax, Tissuemat E, fat and oils synthetic wax (ester, ketone, amide) and hydrogenation wax) of mineral.In these waxes, preferred source is from the wax of oil, and preferred especially paraffin wax.
The water-soluble material of the dental pulp portion in the ceramic sintered bodies of tooth for dental arch model of the present invention contains at least a in polysaccharide and the proteinaceous materials.Water-soluble material can be by water filling or water in advance dipping performance effect.Protein is preferred.
Hydrophilic polymer also is preferably used as water-soluble material.For example, can use: semi-synthetic carboxymethyl cellulose (CMC) and the methylcellulose (MC) of cellulose derivative as being derived from natural prodcuts; With synthetic water-soluble polymer such as polyvinyl alcohol (PVA), polyacrylamide base class polymer, polyacrylamide (PAM) and poly(ethylene oxide) (PEO) etc.
The preferred dextrin of polysaccharide, glycogen, cellulose, pectin, konjacmannan, glucomannan and alginic acid, more preferably cellulose, pectin, konjacmannan and glucomannan.Reason be need be to a certain degree viscosity.
Protein-based chemical compound can be the macromolecular compound that mainly is made of the polypeptide that comprises about 20 kinds of L-a-amino acids.Consider composition, the simple protein that preferred use only is made of aminoacid, and the conjugated protein that comprises nucleic acid, phosphoric acid, lipid, saccharide and metal.More preferably starch, gelatin, agar, ossein and elastin laminin.Also more preferably gelatin and agar, this is because need it to be dissolved in the water apace and keep the dental pulp shape.
In the present invention, although be enamel portion and dentine portion with dental part, by using the present invention by making the molding integratedly of tooth portion, only dental pulp can by resin, silicone rubber, wax, and water-soluble material form.
In natural tooth, dental caries is tending towards taking place in the residual position of food debris, and mainly the space between occlusal surface, tooth and tooth cervical region (border between crown and the tooth root) produces.Dental caries is carried out on dentine material easily when comparing with the glaze material.
Although crown is formed by the enamel tissue, be difficult to clean occlusal crack fully, and crown forms by the nanoid enamel tissue, thereby dental caries is carried out to dentinal tissue easily.
In the tooth cervical region, dentinal tissue is exposed from the enamel tissue, thereby dental caries is carried out easily.
In tooth for dental arch model of the present invention, doubtful dental caries portion can be between enamel portion and dentine portion, or at its edge, or near the dentine side the transition portion of enamel portion and dentine portion forms.
Preferably the boundary vicinity between enamel portion and the dentine portion forms doubtful dental caries portion in occlusal surface or tooth cervical region.Compare particularly preferably in forming in the dentine portion with enamel portion.
For example, when on occlusal surface, forming doubtful dental caries portion, when comparing, preferably form big doubtful dental caries portion in dentine portion with enamel portion.In the case, reproduce the crack dental caries.
When forming doubtful dental caries portion at the tooth cervical region, preferably form doubtful dental caries portion near the dentine side of the enamel portion transition of dentine portion from the flank of tooth.In the case, reproduce the surperficial dental caries of tooth root portion.
Doubtful dental caries portion is formed by inorganic powder, resin or composite.Preferably be convenient to cutting with the order of enamel portion, dentine portion and doubtful dental caries portion.
Concrete combination comprises: the wherein combination that enamel portion and dentine portion are formed by the inorganic sintered body and doubtful dental caries portion is formed by resin or composite; Wherein enamel portion is formed by the inorganic sintered body, and dentine portion is formed by composite, and doubtful dental caries portion is by resin or the combination that forms of the composite of cutting easily when comparing with dentine portion; And wherein enamel portion is formed by composite, dentine portion by when comparing with enamel portion easily the composite of cutting forms, and doubtful dental caries portion is by resin or the easy composite that cuts forms when compare with dentine combination.
Inorganic powder, resin or composite as doubtful dental caries portion can have identical composition with enamel portion or dentine portion.
The present invention relates to tooth for dental arch model, it is characterized in that in doubtful dental caries portion, containing in coloured material, fluorescent material and the x-ray imaging material at least any.
The preferred extremely doubtful dental caries of the coloured material portion that adds.Coloured material can be dyestuff or pigment.The dental caries position can visually be confirmed by painted, and can easily cut.Preferred dark coloured material, and especially preferably black coloured material.
Also preferred and fluorescent agent and x-ray contrast agent are used in combination coloured material.
The preferred extremely doubtful dental caries of the fluorescent agent portion that adds.The agent of the preferred UV of fluorescent agent (ultraviolet) fluorescence of excitation type, more preferably UV fluorescence of excitation type pigment.Usually, at when cutting emitting fluorescence not, and can confirm by using the black light emitting fluorescence.
As fluorescent agent, can use Co., the fluorescent agent that LTD. is obtained commercially from giant manufacturer ARBROWN.
Can not be subjected to any restrictedly use can be scattered in as in the resin of base material with the material of emitting fluorescence, for example from SINLOIHI Co., the fluorescent pigment that Ltd. is obtained commercially.
As the agent of UV fluorescence of excitation type, can use UV excitated type organic fluorescent pigment or inorganic fluorescent pigment.
Preferably give doubtful dental caries portion with x-ray imaging.X-ray imaging can by with x-ray contrast agent such as SrO, BaO, ZnO, ZrO
2, La
2O
3Mix with other heavy metal element oxide and obtain.
By giving doubtful dental caries portion with x-ray imaging, use the X ray photography can confirm that dental caries removes after the treatment training, and preferably to be used for estimating cutting.
Preferably give doubtful dental caries portion with x-ray imaging.X-ray imaging can by with x-ray contrast agent such as SrO, BaO, ZnO, ZrO
2, La
2O
3Mix with other heavy metal element oxide and obtain.The preferred SrO of x-ray contrast agent, BaO, ZnO, ZrO
2Or La
2O
3, more preferably ZnO or ZrO
2
The mean diameter of coloured material, fluorescent agent or x-ray contrast agent is 0.1 to 30 μ m, preferred 1.0 to 10 μ m, more preferably 1.0 to 5.0 μ m.Can use coloured material or fluorescent agent, and x-ray contrast agent can be dyestuff.
Even when doubtful dental caries portion has the composition identical with enamel portion or dentine portion, do not have problems if can use coloring agent or fluorescent agent to judge.Therefore, can be by judging that based on tone dental caries portion trains.
Even when doubtful dental caries portion has the composition different with enamel portion or dentine portion, preferred use with dentine color or enamel color much at one fluorescent agent or x-ray contrast agent as color, with by judging that the cutting sense indicates.
When doubtful dental caries portion is formed by the material different with dentine portion or enamel portion, can be by in doubtful dental caries portion, being used in combination fluorescent agent and x-ray contrast agent by remove the training of dental caries portion based on the sensation cutting tooth of different materials.Use the photography of black light or X ray can confirm whether dental caries is removed fully after a while.
Doubtful dental caries portion 5 can be by following reproduction: by material adhesion is reproduced to enamel portion 1 or dentine portion 2 by any the dental caries portion that is mixed with at least in inorganic powder, resin or composite and coloured material, fluorescent material and the x-ray imaging material, or material reproduces in this dental caries portion of injection in the nest hole that forms in enamel portion 1 or dentine portion 2.
Dental caries portion can be by following reproduction: applies any dental caries portion at least of containing in coloured material, fluorescent material and the x-ray imaging material and reproduces material to enamel portion 1 or dentine portion 2, or with this dental caries portion reproduction material soaking.For example, coloured material, fluorescent agent and x-ray contrast agent are scattered in the solvent, and with gained dispersion liquid dipping dentine, thereby can form doubtful dental caries portion.This method is preferred, because can easily form doubtful dental caries portion.
Use description to make the method for tooth for dental arch model of the present invention below.(when enamel portion is formed by the sintered body of inorganic powder and dentine portion when being formed by composite)
Use Al
2O
3Powder (mean diameter: 0.5 μ m) sintered body is shaped to enamel portion.With composite (white carbon black: 5%, zinc oxide: 10%, the inorganic fluorescent pigment of UV excitated type: 30%, epoxy: 55%, little amount of catalyst) dental caries portion reproduce material be applied to sintered body the dentine side part and solidify, then gained enamel portion is arranged in the tooth shape mould, and filling is by composite (titanium oxide: 5%, SiO 2 powder (5 μ m): 70%, epoxy: 25%, little amount of catalyst) the dentine portion that forms is to obtain tooth for dental arch model.
(when enamel portion and dentine portion form by composite)
With composite (white carbon black: 5%, zinc oxide: 10%, the inorganic fluorescent pigment of UV excitated type: 30%, epoxy: 55%, little amount of catalyst) dental caries portion reproduces material and is applied to by composite (titanium oxide: 5%, SiO 2 powder (5 μ m): 70%, epoxy: 25%, little amount of catalyst) part of the dentine side of the molded body with enamel shape of Xing Chenging and curing, then gained enamel portion is arranged in the tooth shape mould, and the filling by composite (titanium oxide: 5%, SiO 2 powder (5 μ m): 70%, epoxy: 25%, little amount of catalyst) the dentine portion that forms is to obtain tooth for dental arch model.
Preferably by injection moulding molding enamel portion and dentine portion.
(when enamel portion and dentine portion form by the sintered body of inorganic powder)
Use Al
2O
3Powder (mean diameter: 5 μ m) sintered body is shaped to dentine portion and enamel portion.With composite (white carbon black: 5%, zinc oxide: 10%, the inorganic fluorescent pigment of UV excitated type: 30%, epoxy: 55%, little amount of catalyst) part and the curing that material is applied to the dentine portion in the hat that is inserted into enamel portion is reproduced by dental caries portion, uses adhering with epoxy resin enamel portion and dentine portion to obtain tooth for dental arch model then.
When forming doubtful dental caries portion after enamel portion and the molding integratedly of dentine portion, make tooth, form the space and, inject dental caries portion reproduction material then in the wherein doubtful dental caries portion for dental caries portion is provided with the hole.Can thin portion, open aperture, and this hole can be used for injecting dental caries portion reproduction material from enamel portion to dentine portion.In natural tooth, should thin portion be called nest, and tend to be the part that dental caries occurs.Thereby, the tooth that preferred acquisition has well reproduced.Owing to this hole of following reason can preferably make on the interproximal surface of tooth.That is, the gained tooth is the tooth with well reproduced, and this is because frequently occur dental caries between the adjacent teeth in nipper.
Except these methods, can implement its many combinations.Simple combination is shown below.
The combination of enamel portion, dentine portion and doubtful dental caries portion is shown in table 1.
Table 1
*: excite pigment or x-ray contrast agent dipping dentine portion to obtain doubtful dental caries portion with coloring agent, UV.
The table of explained later combination.Each numeral that is shown in table is for being shown in the numeral of following table.As shown in the table, " 1 " expression enamel portion, " 2 " expression dentine portion and the doubtful dental caries of " 3 " expression portion.
In combination 1, all enamel portions, dentine portion and doubtful dental caries portion are all formed by the sintered body of inorganic powder.As mentioned above, preferably with the order deliquescing (cutting easily) of enamel portion, dentine portion and doubtful dental caries portion.When these layers are formed by alumina powder, if enamel portion is formed by the granule with 0.1 μ m primary particle size, dentine portion is formed by the granule with 2 μ m primary particle sizes, and doubtful dental caries portion forms by the granule with 5 μ m primary particle sizes, then can easily cut sintered body and can detect dental caries in working angles.
In combination 2, enamel portion and dentine portion are formed by the sintered body of inorganic powder.Doubtful dental caries portion is formed by composite.As mentioned above, preferably with the order deliquescing of enamel portion and dentine portion.
In combination 3, the doubtful dental caries portion of combination 2 is formed by thermosetting resin or the thermoplastic resin that contains cross-linking agent.Combination 2 and combination 3 all are preferred combinations.
In other combination, similarly, be preferred for sintered body that material in enamel portion, dentine portion and the doubtful dental caries portion can be selected from inorganic powder, composite, " thermosetting resin, contain the thermoplastic resin of cross-linking agent ", thermoplastic resin and by dipping (
*) material of dentine portion preparation.
" by the dipping (
*) material of dentine portion preparation " only be used for doubtful dental caries portion, and by preparing with coloured material, fluorescent material or x-ray imaging material soaking dentine portion.This method can not provide the difference about the cutting easiness of dentine portion, but when compare with traditional tooth model, if tooth is formed by the sintered body of inorganic powder, then its can make cutting train and natural tooth similar.
Preferred doubtful dental caries portion is than enamel portion and dentine portion soft (cutting easily).Preferably with the order deliquescing (cutting easily) of enamel portion, dentine portion and doubtful dental caries portion.Reason is to carry out judging by the sensation cutting material training of dental caries cutting.
Enamel quality award from the ministry choosing is by the sintered body of inorganic powder, composite or " thermosetting resin, contain the thermoplastic resin of cross-linking agent ", the more preferably sintered body of inorganic powder or composite, and also more preferably the sintered body of inorganic powder forms.The choosing of enamel quality award from the ministry organizes the hard material of similar cutting sense to form by having with enamel.
Dentine quality award from the ministry choosing is by the sintered body of inorganic powder, composite, " thermosetting resin, contain the thermoplastic resin of cross-linking agent " or thermoplastic resin, the sintered body of inorganic powder, composite, " thermosetting resin, contain the thermoplastic resin of cross-linking agent " in addition, the more preferably sintered body of inorganic powder or composite, the also more preferably sintered body of inorganic powder formation.Reason is that these materials have with dentinal tissue and similarly feel.Can not only use thermoplastic resin.Its common deliquescing when cutting.
Doubtful dental caries portion available " thermosetting resin, contain the thermoplastic resin of cross-linking agent " or thermoplastic resin impregnated." thermosetting resin, contain the thermoplastic resin of cross-linking agent " and thermoplastic resin are preferred.Yet because the cutting sense is not only to change according to dipping, so it can not be used for the training to difference cutting sense.
Embodiment
Formation has after the die of the enamel portion of teeth patterning and dentine portion, and manufacturing can injection moulding be the mould of required form.Owing to cause contraction by defat and sintering after molding enamel portion and the dentine portion, therefore consider that excessive contraction prepares mould.Carry out injection moulding and adjust the mould that is used for every kind of material simultaneously.
[making tooth for dental arch model] according to first aspect
(embodiment 1)
With the CIM alumina globule (Al of 1kg as the raw material of enamel portion
2O
3: 26%, SiO
2: 44%, mean diameter: 0.25 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
With the injection molded article defat that gained has enamel portion shape, sintering (1,300 ℃, the time of staying: 10 minutes) is to obtain sintered body 1-1 then.
With the CIM alumina globule (Al of 1kg as dentine portion raw material
2O
3: 26%, SiO
2: 44%, mean diameter: 3.0 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
Gained had the injection molded article defat of dentine portion shape and sintering (1,000 ℃, the time of staying: 10 minutes) to obtain sintered body 1-2.
With 1kg CIM alumina globule (Al
2O
3: 68%, SiO
2: 2%, mean diameter: 0.3 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
Gained had the injection molded article defat of enamel portion shape and sintering (1,550 ℃, the time of staying: 10 minutes) to obtain sintered body 2-1.
With the CIM alumina globule (Al of 1kg as dentine portion raw material
2O
3: 68%, SiO
2: 2%, mean diameter: 5.0 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
Gained had the injection molded article defat of dentine portion shape and sintering (1,400 ℃, the time of staying: 15 minutes) to obtain sintered body 2-2.
Check enamel portion and the sintered body 1 of dentine portion acquisition and 2 cutting sense by using the bonding gained sintered body of various bonding agents 1-1,1-2,2-1 and 2-2.Make and test 30 sintered bodies.
(epoxy resin)
Be applied to interface between gained enamel portion and the dentine portion with containing the epoxy resin that wherein adds catalyst, thus bonding they.Make and place after 72 hours, use diamond rod inspection cutting sense.
(ceramic bonding agent)
The ceramic bonding agent is applied to interface between gained enamel portion and the dentine portion, thus bonding they.Make and place after 72 hours, use diamond rod inspection cutting sense.
(binder material)
Use can by with ionic polymers and the solidified powder of glass reaction-liquid mixing type binder material.Binder material is applied to interface between enamel portion and the dentine portion, thus bonding they.Make and place after 72 hours, use diamond rod inspection cutting sense.
(α-Qing Jibingxisuanzhidanti class bonding agent) (abbreviated name: the α bonding agent)
With the bonding agent that is obtained commercially
Be applied to the interface between enamel portion and the dentine portion, thus bonding they.Make and place after 72 hours, use diamond rod inspection cutting sense.
Table 2
| |
Cementability | The cutting sense | Chip |
| Epoxy resin | A | A | A |
| The ceramic bonding agent | A | A | A |
| Binder material | A | A | B |
| The α bonding agent | A | A | B |
| |
Cementability | The cutting sense | Chip |
| Epoxy resin | A | A | A |
| The ceramic bonding agent | A | A | A |
| Binder material | A | A | B |
| The α bonding agent | A | A | B |
A: obtain and the similar good result of natural tooth.
B:, chip partly occurs although can confirm bondingly fully.
About sintered body 2, when comparing with sintered body 1, dentine portion and enamel portion all show with natural tooth similarly cuts sense.
Two kinds of sintered bodies all show good cutting sense.Although under the situation of binder material and α bonding agent, chip occurs, obtain similarly to cut sense with natural tooth.
(comparative example 1)
Formation has after the die of teeth patterning of enamel portion and dentine portion, and manufacturing can form the mould of desired shape.
In comparative example 1, manufacturing can form the injecting molding die of double-layer structure, to obtain to comprise the molded body of dentine portion and enamel portion.
With 1kg CIM alumina globule (Al
2O
3: 26%, SiO
2: 44%, mean diameter: 0.25 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
With the CIM alumina globule (Al of 1kg as dentine portion raw material except enamel portion
2O
3: 26%, SiO
2: 44%, mean diameter: 3.0 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
Gained had the injection molded article defat of shape of enamel portion and sintering (1,100 ℃, the time of staying: 10 minutes) to obtain sintered body 3.Make and test 30 sintered bodies.
With the CIM alumina globule (Al of 1kg as enamel portion raw material
2O
3: 68%, SiO
2: 2%, mean diameter: 0.3 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
With the CIM alumina globule (Al of 1kg as dentine portion raw material except enamel portion
2O
3: 68%, SiO
2: 2%, mean diameter: 5.0 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
Gained had the injection molded article defat of tooth shape and sintering (1,500 ℃, the time of staying: 15 minutes) to obtain sintered body 4.Make and test 30 sintered bodies.
In sintered body 3 and 4, because the difference of shrinkage factor, be full of cracks appears in the boundary between enamel portion and dentine portion, therefore can not obtain bonding in many samples.During cutting, occur breaking or chip.
(embodiment 2)
In order to check the amount of making bonding agent during the bead influence, except stearic amount is changed into 18%, make sintered body 5 and 6 in the mode identical with comparative example 1 to the shrinkage factor of sintered body.
In sintered body 5 and 6, enamel portion and dentine portion are fully bonding, and the cutting sense of enamel portion and dentine portion is all similar with natural tooth.
Have been found that: during the cutting that the difference by thermal expansion during sintering and contraction between dentine portion and the enamel portion causes break or chip can make that the amount of binding agent prevents during the bead by control.
(embodiment 3)
Use bonding sintered body 1-1, the 1-2 that makes in the mode identical of low-melting glass powder, enamel portion and the dentine portion of 2-1,2-2, check the cutting sense then with embodiment 1.
To be used as glass powder by the IP9021 (low-melting glass is at 575 ℃ of following sintering) that Heraeus K.K. makes, and use IP9049 (low-melting glass is at 610 ℃ of following sintering) to obtain sintered body 8 with acquisition sintered body 7.
Table 3
| Cementability | The cutting sense | Chip | |
| Sintered body 7 | C | B | C |
| Sintered body 8 | C | B | C |
A: obtain and the similar good result of natural tooth.
B:, chip partly occurs although can confirm bondingly fully.
C: excellence when comparing with traditional tooth.
About cementability, bonding dentine and enamel are to form the one material.Although obtain similarly to cut sense with natural tooth, be full of cracks appears at the bonding interface place.Although can confirm bondingly fully, chip partly appears.This thinks owing to the glass as bonding agent does not disperse on whole interface, therefore partly forms not bonding face, thereby chip occurs at this part place.
About sintered body 7 and 8, by the sintering molten glass, and bonding dentine portion and enamel portion, thereby be full of cracks appears in the glass part at the interface during cutting, and occurs peeling off or chip at the adhesive linkage of glass.
Though leave over the problem that relates to cementability or chip in the mode identical, obtain remarkable result about the cutting sense with embodiment 1.
(embodiment 4)
Use enamel portion and the dentine portion of bonding sintered body 1-1,1-2,2-1 and the 2-2 that makes in the mode identical of epoxy resin, ceramic bonding agent, binder material and α bonding agent, check the cutting sense then with embodiment 1.For controlling diaphragm thickness, the alumina powder of each film thickness of enamel portion and dentine portion by will having 700 μ m, 400 μ m, 350 μ m, 250 μ m, 150 μ m, 50 μ m or 20 μ m particle diameters separately mixes with each bonding agent of 3% and limits.
Manufacturing and cutting have the tooth of definite adhesive linkage, then by the microscopic examination adhesive linkage.The thickness of confirming adhesive linkage is than under the situation of the alumina powder that is used to control each thickness of adhibited layer thick tens microns.
Table 4-1
Table 4-2
Table 4-3
Table 4-4
EX: with the similar good result of natural tooth
A: obtain and the similar good result of natural tooth
B:, chip partly occurs although can confirm bondingly fully.
C: excellence when comparing with traditional tooth.
Although depend on the kind of bonding agent, be tending towards strengthening the cutting sense of adhesive linkage during the cutting greater than the particle diameter of the alumina powder of 700 μ m.When particle diameter is about 500 μ m when following, think that products obtained therefrom can be used for the cutting training.In addition, when the adhesive linkage attenuation, it becomes and can not feel the cutting sense of bonding agent.Although depend on the kind of bonding agent, when particle diameter is about 500 μ m when following, it becomes and can not feel the cutting sense of bonding agent.In addition, when particle diameter is 300 μ m when following, can feel to occur chip hardly, and cementability strengthens.In addition, when particle diameter is 200 μ m when following, can carry out fully bonding, and can the cutting edge part and can not feel under the weather.When particle diameter is 100 μ m when following, reduces about the sensation of adhesive linkage, and be fine and can not feel surprised to the transition of dentine portion from enamel portion.
(embodiment 5)
The Al that 700g is had 3.0 μ m primary particle sizes
2O
3The stearic acid heating of powder and 300g (30%) is mediated, and injects dentine shape mould then.With injection molded article 600 ℃ of following defats 3 hours, then at 1,400 ℃ of following sintering.The time of staying under this sintering temperature is 15 minutes.As the refrigerative result of natural air, fully form dentine portion.
The Al that 700g is had 0.3 μ m primary particle size
2O
3The stearic acid heating of powder and 300g (30%) is mediated, and injects enamel shape mould then.With injection molded article 600 ℃ of following defats 3 hours then at 1,500 ℃ of following sintering.The time of staying under this sintering temperature is 15 minutes.As the refrigerative result of natural air, fully form enamel portion.
Use adhering with epoxy resin gained enamel portion and dentine portion.Test result is shown in Table 6.In this test, use the dental diamond rod.
(embodiment 6 to 10, comparative example 2 to 6)
In embodiment 6 to 10 and comparative example 2 to 6, carry out with embodiment 5 identical operations.Be shown in Table 5 with the difference of embodiment 5.Test result is shown in Table 6.
Table 5-1
| Enamel | The mean diameter of aluminium oxide (μ m) | The amount of aluminium oxide (g) | Binding agent | The amount of binding agent (g) | Skimming temp (℃) | Forming temperature (℃) |
| |
0.3 | 700 | Stearic acid | 300 | 600 | 1500 |
| Embodiment 6 | 0.1 | 700 | Stearic acid | 300 | 600 | 1500 |
| Embodiment 7 | 0.3 | 700 | Stearic acid | 300 | 600 | 1600 |
| Embodiment 8 | 0.8 | 700 | Polyvinyl alcohol | 300 | 600 | 1500 |
| Embodiment 9 | 0.5 | 650 | Stearic acid | 350 | 600 | 1400 |
| Embodiment 10 | 0.5 | 650 | Polyvinyl alcohol | 350 | 600 | 1500 |
| Comparative example 2 | 0.3 | 700 | Stearic acid | 300 | 600 | 1100 |
| Comparative example 3 | 0.3 | 700 | Stearic acid | 300 | 600 | 1800 |
| Comparative example 4 | 5.0 | 700 | Polyvinyl alcohol | 300 | 600 | 1500 |
| Comparative example 5 | 5.0 | 650 | Stearic acid | 350 | 600 | 1400 |
| Comparative example 6 | 5.0 | 650 | Polyvinyl alcohol | 350 | 600 | 1800 |
Table 5-2
| Dentine | The mean diameter of aluminium oxide (μ m) | The amount of aluminium oxide (g) | Binding agent | The amount of binding agent (g) | Skimming temp (℃) | Forming temperature (℃) |
| |
3.0 | 700 | Stearic acid | 300 | 600 | 1400 |
| Embodiment 6 | 2.0 | 700 | Stearic acid | 300 | 600 | 1500 |
| Embodiment 7 | 3.0 | 700 | Stearic acid | 300 | 600 | 1600 |
| Embodiment 8 | 5.0 | 700 | Polyvinyl alcohol | 300 | 600 | 1500 |
| Embodiment 9 | 2.0 | 650 | Stearic acid | 350 | 600 | 1400 |
| Embodiment 10 | 2.0 | 650 | Polyvinyl alcohol | 350 | 600 | 1500 |
| Comparative example 2 | 3.0 | 700 | Stearic acid | 300 | 600 | 1100 |
| Comparative example 3 | 3.0 | 700 | Stearic acid | 300 | 600 | 1800 |
| Comparative example 4 | 0.5 | 700 | Polyvinyl alcohol | 300 | 600 | 1500 |
| Comparative example 5 | 20.0 | 650 | Stearic acid | 350 | 600 | 1400 |
| Comparative example 6 | 20.0 | 650 | Polyvinyl alcohol | 350 | 600 | 1800 |
Table 6
| Mouldability | Machinability | Abutment tooth formation property | Cavity preparation | Dentine-enamel transitionality | |
| Embodiment 5 | A | A | A | A | A |
| Embodiment 6 | A | A | A | A | A |
| Embodiment 7 | A | A | A | A | A |
| Embodiment 8 | A | A | A | A | A |
| Embodiment 9 | A | A | A | A | A |
| Embodiment 10 | A | A | A | A | A |
| Comparative example 2 | A | C | C | C | C |
| Comparative example 3 | A | C | C | C | C |
| Comparative example 4 | A | C | C | C | C |
| Comparative example 5 | A | C | C | C | C |
| Comparative example 6 | A | C | C | C | C |
(based on cutting sense, abutment tooth formation property and cavity preparation with the similarity evaluation of natural tooth.A: good, B: common, C: poor)
Dentine-enamel transitionality refers to the cutting sense when the interface between cutting material process dentine portion and the enamel portion.Confirm whether dentine-enamel transitionality is similar with natural tooth.
In embodiment 5 to 10, can make have excellent mouldability, cutting sense, abutment tooth form property and cavity preparation and the cambic tooth of dentine-enamel.
In comparative example 2, can not carry out sufficient sintering owing to sintering temperature and low, cause soft cutting sense.
In comparative example 3,, cause hard cutting sense owing to high sintering temperature is carried out over-drastic sintering.Little chip (be full of cracks) appears during cutting.
In comparative example 4, the soft and dentine portion hardening of enamel portion.The cutting sense is very different with natural tooth.
In comparative example 5, enamel portion and dentine portion are all soft.The cutting sense is very different with natural tooth.
In comparative example 6, when comparing with comparative example 5, enamel portion and all hardening of dentine portion.The cutting sense is very different with natural tooth.
(embodiment 11 to 15, comparative example 7 to 11)
Embodiment and comparative example that wherein dentine portion and enamel portion have same composition are shown below.Carry out forming method in the mode identical under the conditions shown in Table 7 with embodiment 5.As mould, use dental mold.Test result is shown in Table 8.
Table 7
| The primary particle size of aluminium oxide (μ m) | The amount of aluminium oxide (g) | Binding agent | The amount of binding agent (g) | Skimming temp (℃) | Forming temperature (℃) | |
| Embodiment 11 | 0.2 | 700 | Stearic acid | 300 | 600 | 1500 |
| Embodiment 12 | 0.3 | 700 | Stearic acid | 300 | 600 | 1600 |
| Embodiment 13 | 0.5 | 700 | Polyvinyl alcohol | 300 | 600 | 1500 |
| Embodiment 14 | 0.2 | 650 | Stearic acid | 350 | 600 | 1400 |
| Embodiment 15 | 0.2 | 650 | Polyvinyl alcohol | 350 | 600 | 1500 |
| Comparative example 7 | 0.3 | 700 | Stearic acid | 300 | 600 | 1100 |
| Comparative example 8 | 0.3 | 700 | Stearic acid | 300 | 600 | 1800 |
| Comparative example 9 | 5.0 | 700 | Polyvinyl alcohol | 300 | 600 | 1500 |
| Comparative example 10 | 20.0 | 650 | Stearic acid | 350 | 600 | 1400 |
| Comparative example 11 | 20.0 | 650 | Polyvinyl alcohol | 350 | 600 | 1800 |
Table 8
| Mouldability | Machinability | Abutment tooth formation property | Cavity preparation | |
| Embodiment 11 | A | A | A | A |
| Embodiment 12 | A | A | A | A |
| Embodiment 13 | A | A | A | A |
| Embodiment 14 | A | A | A | A |
| Embodiment 15 | A | A | A | A |
| Comparative example 7 | A | C | C | C |
| Comparative example 8 | A | C | C | C |
| Comparative example 9 | A | C | C | C |
| Comparative example 10 | A | C | C | C |
| Comparative example 11 | A | C | C | C |
(based on cutting sense, abutment tooth formation property and cavity preparation with the similarity evaluation of natural tooth.A: good, B: common, C: poor)
In embodiment 11 to 15, can make have excellent mouldability, tooth that cutting sense, abutment tooth form property and cavity preparation.
Although because the one-body molded dentine-enamel transitionality of not observing, the gained tooth has stood intraoral treatment exercise fully.
In comparative example 7, can not carry out sufficient sintering owing to sintering temperature and low, cause soft cutting sense.
In comparative example 8,, cause hard cutting sense owing to high sintering temperature is carried out over-drastic sintering.Little chip (be full of cracks) appears during cutting.
In comparative example 9, the cutting sense is very different with natural tooth.
In comparative example 10, when comparing with comparative example 9, the tooth deliquescing.The cutting sense is very different with natural tooth.
In comparative example 11, when comparing with comparative example 10, tooth is soft.The cutting sense is very different with natural tooth.
(embodiment 16)
Formation has after the die of tooth shape of enamel portion and dentine portion, and manufacturing can injection moulding be the mould of desired shape.Owing to cause contraction by defat and sintering after molding enamel portion and the dentine portion, therefore consider that excessive contraction prepares mould.Carry out injection moulding and adjust the mould that is used for every kind of material simultaneously.The shrinkage factor of enamel is about 10%, and the shrinkage factor of dentine is about 5%.
(sintered body 9)
With the CIM alumina globule (Al of 1kg as enamel portion raw material
2O
3: 26%, SiO
2: 44%, mean diameter: 0.25 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article 7-1.
With the CIM alumina globule (Al of 1kg as dentine portion raw material
2O
3: 26%, SiO
2: 44%, mean diameter: 3.0 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article 7-2.
In the presence of the following glass powder that places between dentine portion and the enamel portion with the defat of gained injection molded article and sintering (1,200 ℃, the time of staying: 10 minutes) to obtain sintered body 9.
(sintered body 10)
With the CIM alumina globule (Al of 1kg as enamel portion raw material
2O
3: 100%, mean diameter: 0.3 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article 8-1.
With the CIM alumina globule (Al of 1kg as dentine portion raw material
2O
3: 68%, SiO
2: 2%, mean diameter: 5.0 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article 8-2.
In the presence of the following glass powder that places between dentine portion and the enamel portion with the defat of gained injection molded article and sintering (1,400 ℃, the time of staying: 15 minutes) to obtain sintered body 10.
As glass powder, use fused silica with 0.5 μ m mean diameter and 2.0 μ m maximum particle diameters.
(sintered body 11,12)
The enamel portion of sintered body 9-1,9-2,10-1 and the 10-2 that in the presence of the quartz glass powder that places between dentine portion and the enamel portion mode same as described above is obtained and dentine portion sintering are to obtain sintered body 11 and 12.
By cutting test and adhering state test evaluation sintered body 9 to 12.
In the cutting test, can confirm that all sintered bodies 9 to 12 have good cutting sense.
In adhering state test, use diamond disc that in the sintered body 9 to 12 each is cut into thickness and be about 5mm, confirm adhering state then.Can confirm that all sintered bodies 9 to 12 all are under the good adhering state.
(making the tooth for dental arch model of second aspect)
(embodiment 17)
The Al that 700g is had 0.3 μ m primary particle size
2O
3The heating of powder and 300g (30%) stearic acid is mediated, and injects enamel shape mould then.With injection molded article 600 ℃ of following defats 3 hours, then at 1,500 ℃ of following sintering.The time of staying under this sintering temperature is 15 minutes.As the refrigerative result of natural air, fully form enamel portion.
Gained enamel portion is positioned in the tooth shape mould, and epoxy resin is injected remaining dentine portion.Test result is shown in Table 10.In this test, use the dental diamond rod.
(embodiment 18 to 22, comparative example 12 to 16)
In embodiment 18 to 22 and comparative example 12 to 16, carry out with embodiment 17 identical operations.Be shown in Table 9 with the difference of embodiment 17.Test result is shown in Table 10.
Table 9
| Enamel | The primary particle size of aluminium oxide (μ m) | The amount of aluminium oxide (g) | Binding agent | The amount of binding agent (g) | Skimming temp (℃) | Forming temperature (℃) |
| Embodiment 17 | 0.3 | 700 | Stearic acid | 300 | 600 | 1500 |
| Embodiment 18 | 0.2 | 700 | Stearic acid | 300 | 600 | 1500 |
| Embodiment 19 | 0.3 | 700 | Stearic acid | 300 | 600 | 1600 |
| Embodiment 20 | 0.5 | 700 | Polyvinyl alcohol | 300 | 600 | 1500 |
| Embodiment 21 | 0.2 | 650 | Stearic acid | 350 | 600 | 1400 |
| Embodiment 22 | 0.2 | 650 | Polyvinyl alcohol | 350 | 600 | 1500 |
| Comparative example 12 | 0.3 | 700 | Stearic acid | 300 | 600 | 1100 |
| Comparative example 13 | 0.3 | 700 | Stearic acid | 300 | 600 | 1800 |
| Comparative example 14 | 5.0 | 700 | Polyvinyl alcohol | 300 | 600 | 1500 |
| Comparative example 15 | 20.0 | 650 | Stearic acid | 350 | 600 | 1400 |
| Comparative example 16 | 20.0 | 650 | Polyvinyl alcohol | 350 | 600 | 1800 |
Table 10
| Mouldability | Machinability | Abutment tooth formation property | Cavity preparation | Dentine-enamel transitionality | |
| Embodiment 17 | A | A | A | A | A |
| Embodiment 18 | A | A | A | A | A |
| Embodiment 19 | A | A | A | A | A |
| Embodiment 20 | A | A | A | A | A |
| Embodiment 21 | A | A | A | A | A |
| Embodiment 22 | A | A | A | A | A |
| Comparative example 12 | A | C | C | C | C |
| Comparative example 13 | A | C | C | C | C |
| Comparative example 14 | A | C | C | C | C |
| Comparative example 15 | A | C | C | C | C |
| Comparative example 16 | A | C | C | C | C |
(based on cutting sense, abutment tooth formation property and cavity preparation with the similarity evaluation of natural tooth.A: good, B: common, C: poor)
Each is estimated and to confirm all in the cutting tooth model that abutment tooth forms and whether the molding of nest hole shows with natural tooth and similarly cut sense.Similar with natural tooth, estimate by the fact that cutting sense changes between enamel tissue and dentinal tissue, or whether the cutting sense during the evaluation molding is similar with natural tooth.
A: similar with natural tooth
C: obviously too hard or too soft when comparing with natural tooth, use feeling is similar with the resin tooth that is obtained commercially
B: between A and C
When cutting during through the interface between dentine portion and the enamel portion, cutting material whether feels and the similar dentine-enamel transitionality of estimating of natural tooth by confirming.
In embodiment 17 to 22, can make have excellent mouldability, cutting sense, abutment tooth form property and cavity preparation and the cambic tooth of dentine-enamel.
In comparative example 12, can not carry out sufficient sintering owing to sintering temperature and low, cause soft cutting sense.
In comparative example 13,, cause hard cutting sense owing to high sintering temperature is carried out over-drastic sintering.Little chip (be full of cracks) appears during cutting.
In comparative example 14, the hardening of enamel portion.The cutting sense is very different with natural tooth.
In comparative example 15, the enamel deliquescing.The cutting sense is very different with natural tooth.
In comparative example 16, enamel portion hardening when comparing with comparative example 15.The cutting sense is very different with natural tooth.
(embodiment 23 to 27, comparative example 17 to 21)
The enamel portion wherein of illustrating below has embodiment and the comparative example that is used as dentine portion with the composite of embodiment 18 to 22 and comparative example 12 to 16 same compositions and epoxy resin acquisition that will be by mixing 75% alumina powder and 25%.Carry out forming method in the mode identical with embodiment 17.About mould, use dental mold.Test result is shown in Table 11.
Table 11
| Mouldability | Machinability | Abutment tooth formation property | Cavity preparation | |
| Embodiment 23 | A | A | A | A |
| Embodiment 24 | A | A | A | A |
| Embodiment 25 | A | A | A | A |
| Embodiment 26 | A | A | A | A |
| Embodiment 27 | A | A | A | A |
| Comparative example 17 | A | C | C | C |
| Comparative example 18 | A | C | C | C |
| Comparative example 19 | A | C | C | C |
| Comparative example 20 | A | C | C | C |
| Comparative example 21 | A | C | C | C |
(based on cutting sense, abutment tooth formation property and cavity preparation with the similarity evaluation of natural tooth.A: good, B: common, C: poor)
In embodiment 23 to 27, can make have excellent mouldability, tooth that cutting sense, abutment tooth form property and cavity preparation.
Although because the one-body molded dentine-enamel transitionality of not observing, the gained tooth has stood intraoral treatment exercise fully.When comparing, improved the cutting sense of dentine with embodiment 17 to 22.
In comparative example 17, can not carry out sufficient sintering owing to sintering temperature and low, cause soft cutting sense.
In comparative example 18,, cause hard cutting sense owing to high sintering temperature is carried out over-drastic sintering.Little chip (be full of cracks) appears during cutting.
In comparative example 19, the deliquescing of enamel portion.The cutting sense is very different with natural tooth.
In comparative example 20, the deliquescing of enamel portion.The cutting sense is very different with natural tooth.
In comparative example 21, enamel portion deliquescing when comparing with comparative example 20.The cutting sense is very different with natural tooth.
(embodiment 28)
Except enamel portion have the composition identical with embodiment 17 and with composite as the dentine portion, make embodiment in the same manner as described above.
Prepare composite by mixing 55% alumina powder, 20% zinc oxide and 25% epoxy resin.Carry out the forming method of enamel portion in the mode identical with embodiment 1.As mould, use dental mold.Carry out cavity preparation as test, and take the photo of gained tooth model by the dental X-ray equipment.As a result, can easily take the photo of dentine shape.
(embodiment 29)
Except enamel portion have the composition identical with embodiment 17 and with binding agent as the dentine portion, make embodiment in the same manner as described above.
Tartaric powder by 2.6g being comprised 93.5% alumina silicate glass and 6.5% and 1.0g comprise that 45% polyacrylic acid and 55% tricarboxylic liquid mixing prepare binding agent.Carry out the forming method of enamel portion in the mode identical with embodiment 1.As mould, use dental mold.Carry out cavity preparation as test, and take the photo of gained tooth model by the dental X-ray equipment.As a result, can easily take the photo of dentine shape.
(embodiment 30)
Zirconium oxide (the ZrO that 500g is had 3.0 μ m primary particle sizes
2) powder, 200g silicon dioxide (SiO
2) powder and 300g (30%) stearic acid heating kneading, inject enamel shape mould then.With the gained injection molded article 600 ℃ of following defats 3 hours, then at 1,300 ℃ of following sintering.The time of staying under this sintering temperature is 2 hours.As the refrigerative result of natural air, fully form enamel portion.Make tooth in the mode identical with embodiment 17.
When with contain aluminium oxide as the tooth of main component relatively the time, the gained tooth comprises the part with poor cutting sense.Yet when comparing with the enamel tooth that is formed by resin or composite, this tooth can excessively cut hardly and be not soft, also shows with natural tooth and similarly cuts sense.When comparing with glass, this tooth can not produce chip and demonstration and natural tooth similarly cuts sense.Transition portion to dentine portion shows that it has never been realized by traditional tooth model, and need not to use natural tooth just can treat exercise from the transition sensation of enamel tissue to dentinal tissue.
(sintered body of giving inorganic powder is with toughness)
(embodiment 31 to 49, comparative example 22 to 25)
(making agglomerating tooth)
Manufacturing can injection moulding be the mould of teeth patterning.With the CIM alumina globule (Al of 1kg as the raw material of tooth
2O
3: 26%, SiO
2: 44%, mean diameter: 3.0 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
With the injection molded article defat that gained has the dental part shape, sintering (1,300 ℃, the time of staying: 10 minutes) is to obtain sintered body 13 then.
(making the sintered body of enamel portion and dentine portion)
Manufacturing can be to the injection molding mould of shape of the enamel portion and the dentine portion of tooth.Owing to cause contraction by defat and sintering after molding enamel portion and the dentine portion, therefore consider that excessive contraction prepares mould.Carry out injection moulding and adjust the mould that is used for every kind of material simultaneously.
With the CIM alumina globule (Al of 1kg as enamel portion raw material
2O
3: 68%, SiO
2: 2%, mean diameter: 0.3 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
With the injection molded article defat that gained has enamel portion shape, sintering (1,550 ℃, the time of staying: 10 minutes) is to obtain sintered body 14-1 then.
With the CIM alumina globule (Al of 1kg as dentine portion raw material
2O
3: 68%, SiO
2: 2%, mean diameter: 5.0 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
With the injection molded article defat that gained has dentine portion shape, sintering (1,400 ℃, the time of staying: 15 minutes) is to obtain sintered body 14-2 then.
(dipping)
Be embedded into gained sintered body 13,14-1 and 14-2 in each impregnated material and be positioned in the Dewar vessel, then find time.The gap of confirming sintered body is fully flooded with impregnated material.Use bonding sintered body 14-1 of epoxy resin adhesive and 14-2.
Confirm the cutting sense of gained tooth.Make and test 30 sintered bodies.
(impregnated material of test)
Paraffin wax (Nippon Seiro Co., Ltd., standard paraffin wax): before being embedded into sintered body, paraffin wax is fully heated.Confirm paraffin wax liquefaction.
Cera Flava (natural colored Cera Flava): before being embedded into sintered body, Cera Flava is fully heated.Confirm Cera Flava liquefaction.
(by Shin-Etsu Chemical Co., Ltd. makes cellulose, SM-8000): use and contain the silicones that wherein adds catalyst.Make and place after 72 hours, use diamond rod inspection cutting sense.
Konjacmannan (Ina Food Industry Co., Ltd.): konjacmannan is dissolved in the hot water to obtain suitable hardness, then heating.Before putting into exsiccator, introduce coagulant.
Agar (Ina Food Industry Co., Ltd.): agar is dissolved in the hot water to obtain suitable hardness, then heating.
Gelatin (Nitta Gelatin Inc.): gelatin is dissolved in the hot water to obtain suitable hardness, then heating.
Epoxy resin (low-viscosity epoxy resin Z-2/H-07): use and contain the epoxy resin that wherein adds catalyst.Make and place after 72 hours, use diamond rod inspection cutting sense.Acryloyl group resin (acryl resin) (by KURARAY Co., Ltd. makes, the MMA monomer): use and contain the acryloyl group resin that wherein adds the chemical polymerization catalyst.Make and place after 72 hours, use diamond rod inspection cutting sense.
Silicone resin (rtv silicone resin M 8017:Asahi Kasei Corporation): use and contain the silicone resin that wherein adds catalyst.Make and place after 72 hours, use diamond rod inspection cutting sense.
In comparative example 22 to 25, use untreated sintered body.
In test, use with 400, the diamond cutting material of the high speed rotating of 000rpm (use air turbine) cuts.About embodiment 31,32,37 and 38, need not water filling and test.About other embodiment and comparative example, test in the time of water filling.
Table 12
| Sintered body 13 | Impregnated material | The cutting sense | Chip | Cutting toughness | Biological wet sense |
| Embodiment 31 | Paraffin wax | B | A | A | B |
| Embodiment 32 | Cera Flava | B | A | A | B |
| Embodiment 33 | Cellulose | B | A | C | C |
| Embodiment 34 | Konjacmannan | B | A | B | A |
| Embodiment 35 | Agar | B | A | B | A |
| Embodiment 36 | Gelatin | B | A | B | A |
| Comparative example 22 | B | A | D | D |
| Sintered body 14 | Impregnated material | The cutting sense | Chip | Cutting toughness | Biological wet sense |
| Embodiment 37 | Paraffin wax | A | A | A | B |
| Embodiment 38 | Cera Flava | A | A | A | B |
| Embodiment 39 | Cellulose | A | A | C | C |
| Embodiment 40 | Konjacmannan | A | A | B | A |
| Embodiment 41 | Agar | A | A | B | A |
| Embodiment 42 | Gelatin | A | A | B | A |
| Comparative example 23 | A | A | D | D |
A: with the similar good result of natural tooth
B (cutting sense): can not show dentine and enamel fully.Although enamel portion is soft, toughness and natural tooth are similar.
B (cutting toughness): slight elastic sensation is arranged, immalleable.
C (cutting toughness): toughness is soft when comparing with natural tooth.
A (biological wet sense): similar with natural tooth, the wet sensation that reaches biological wet sense and have proud flesh.Obtain good result.
B (biological wetting felt): similar with natural tooth, reach biological wet sense, still proud flesh feels slightly poor when comparing with A.
C (biological wet sense): when comparing with natural tooth, biological wet sense is different.
D: the toughness when not reaching cutting, and dust seriously disperses.
When with comparative example 22 and 23 relatively the time, embodiment 31,32,37 and 38 shows toughness, and acquisition and natural tooth similarly cut sense.Feel also similar from the body fluid of dentinal tubule.Lack under the situation of amount than comparative example 22 of cutting dust, and the cutting dust disperses hardly.Need not water filling just can easily cut.Confirm need not the training that the tooth cutting just can be easily carried out in water filling.Similar with natural tooth, although confirm biological wet sense, the wax fusing is slightly different with the situation of live body.
About embodiment 33 and 39, when relatively the time, confirming toughness with comparative example 22 and 23, and acquisition and natural tooth similarly cut sense.
Although observe the cellulosic dissolving that causes by water filling, finished test and do not produced any problem.Lack under the situation of amount than comparative example 22 of cutting dust, and the cutting dust disperses hardly.Yet biological wet sense is different.
About embodiment 34,35,36,40,41 and 42, when confirming toughness with embodiment 33 and 39 relatively the time, and acquisition and natural tooth similarly cut sense.Feel also similar from the body fluid of dentinal tubule.Lack under the situation of amount than comparative example 22 of cutting dust, and the cutting dust scatters hardly.Need not water filling just can easily cut.
The training of tooth cutting can be easily carried out in affirmation in the actual clinical environment under water filling.Similar with natural tooth, confirm biological wet sense and obtain good result.
(embodiment 43)
Sintered body 13 and 14 is embedded among the Fett (Adeps Bovis seu Bubali) as impregnated material to obtain tooth.Before being embedded into sintered body, Fett is fully heated, and confirm Fett liquefaction.Cool off after 24 hours, as the result of cutting, tooth show excellent cutting sense, cutting toughness and with the similarly wet sense of live body.Especially, when comparing, excellent with the similarly wet sense of live body with other material.The abnormal smells from the patient that smooth and excessive when cutting during cutting produces is also similar.
Table 13
| Sintered body 13 | Impregnated material | The cutting sense | Chip | Cutting toughness | Biological wet sense |
| Embodiment 44 | Epoxy resin | B | A | A | A |
| Embodiment 45 | The acryloyl group resin | B | A | A | A |
| Embodiment 46 | Silicone resin | B | A | B | B |
| Comparative example 24 | B | A | D | D |
| Sintered body 14 | Impregnated material | The cutting sense | Chip | Cutting toughness | Biological wet sense |
| Embodiment 47 | Epoxy resin | A | A | A | A |
| Embodiment 48 | The acryloyl group resin | A | A | A | A |
| Embodiment 49 | Silicone resin | A | A | B | B |
| Comparative example 25 | A | A | D | D |
A: with the similar good result of natural tooth
B (cutting sense): can not show dentine and enamel fully.
B (cutting toughness): there is slight elastic sensation, immalleable.
D: the toughness when not confirming to cut, and a large amount of dust disperses.
A (pulverizing sense during cutting): pulverize sense when confirming cutting hardly, and confirm the sensation of cutting live body tooth.
B (pulverizing sense during cutting): pulverize sense when confirming cutting, and confirm and the slightly different sensation of cutting live body tooth.
D: the toughness when confirming cutting, and a large amount of dust disperses.
About embodiment 44 and 45, when comparing, confirm that toughness and acquisition and natural tooth similarly cut sense with comparative example 24.The amount of cutting dust is than lack in the comparative example 24, and cuts dust and disperse hardly.The distinctive pulverizing sense of pottery when confirming cutting hardly, and acquisition and live body tooth similarly cut sense.
About embodiment 46, affirmation toughness and acquisition and natural tooth similarly cut sense when comparing with comparative example 24.The amount of cutting dust is than lack in the comparative example 24, and cuts dust and disperse hardly.When comparing with embodiment 44 and 45, the amount of the cutting dust that disperses is big.The cutting sense is similar with natural tooth.When with embodiment 44 and 45 relatively the time, the resistance sense when thinking the natural tooth of cutting is slightly poor.Although it is worse than embodiment 44 and 45, can reproduce the state of natural tooth.
About embodiment 47 and 48, when comparing, confirm toughness and obtain similarly to cut sense with natural tooth with comparative example 25.The amount of cutting dust is few when comparing with comparative example 25, and the cutting dust disperses hardly., obtain and the similar tough and tensile cutting sense of natural tooth when the transition of dentine portion from enamel portion.The distinctive pulverizing sense of pottery when confirming cutting hardly, and sensation with cut the live body tooth feel similar.
About embodiment 49, affirmation toughness and acquisition and natural tooth similarly cut sense when comparing with comparative example 25.The amount of cutting dust is few when comparing with comparative example 25, and the cutting dust disperses hardly.When comparing with embodiment 47 and 48, the amount of the cutting dust that disperses is big.The cutting sense is also similar with natural tooth.
When during to the transition of dentine portion, obtaining and the similar tough and tensile cutting sense of natural tooth from enamel portion.When comparing, think that the resistance sense different with natural tooth is slightly poor with embodiment 47 and 48.Although it is worse than embodiment 47 and 48, can reproduce the state of natural tooth.
[forming dental pulp portion]
(embodiment 50 to 55)
(making flammability dental pulp mould)
Use silicon rubber mould fixture has the wax of the dental pulp shape of target tooth, and epoxy resin is injected silicone rubber to obtain flammability dental pulp mould.
(making the sintered body of tooth)
Manufacturing can injection moulding be the mould of the target shape of teeth patterning.In this mould, setting stops portion (stopper part) so that flammability dental pulp mould to be set.With the CIM alumina globule (Al of 1kg as the tooth raw material
2O
3: 26%, SiO
2: 44%, mean diameter: 0.3 μ m, stearic acid: 30%) injection moulding is set in the tooth shape mould of flammability dental pulp mould therein to obtain injection molded article.
With the injection molded article defat that gained has tooth portion shape, sintering (1,300 ℃, the time of staying: 10 minutes) is to obtain sintered body 15 then.
(making the sintered body of enamel portion and dentine portion)
Manufacturing can injection moulding be the mould of the target shape of teeth patterning.In this mould, setting stops portion so that flammability dental pulp mould to be set.Owing to cause contraction by defat and sintering after molding enamel portion and the dentine portion, therefore consider that excessive contraction prepares mould.Carry out injection moulding and adjust the mould that is used for every kind of material simultaneously.
With the CIM alumina globule (Al of 1kg as enamel portion raw material
2O
3: 68%, SiO
2: 2%, mean diameter: 0.3 μ m, stearic acid: 30%) in tooth shape mould injection moulding to obtain injection molded article.
With the injection molded article defat that gained has enamel portion shape, sintering (1,550 ℃, the time of staying: 10 minutes) is to obtain sintered body 16-1 then.
With the CIM alumina globule (Al of 1kg as dentine portion raw material
2O
3: 68%, SiO
2: 2%, mean diameter: 5.0 μ m, stearic acid: 30%) injection moulding is set in the tooth shape mould of flammability dental pulp mould therein to obtain injection molded article.
Gained had the injection molded article defat of dentine portion shape and sintering (1,400 ℃, the time of staying: 15 minutes) to obtain sintered body 16-2.Use bonding sintered body 16-1 of resin adhesive and 16-2 to obtain sintered body 16.
(injection pulp material)
Every kind of material of injector to inject is used in the space that is used for dental pulp in gained sintered body 15 and 16.
Check the cutting sense of gained tooth.Make and test 30 sintered bodies.
(resin of test)
Polyvinyl alcohol: filled polyethylene alcohol is dry then.Make and place after 72 hours, use diamond rod inspection cutting sense.
Polyurethane rubber with 30 hardness: use and contain the polyurethane rubber that wherein adds the chemical polymerization catalyst.Make and place after 72 hours, use diamond rod inspection cutting sense.Silicone rubber (RTV silicone rubber resina M8017:Asahi Kasei Corporation): use and contain the silicone rubber resina that wherein adds catalyst.Make and place after 72 hours, use diamond rod inspection cutting sense.
(comparative example 26 to 31)
Use comparative example that wherein enamel portion/dentine portion is formed by epoxy resin (comparative example 26 to 28) and comparative example (comparative example 29 to 31) that wherein enamel portion/dentine portion is formed by melmac as a comparative example, resin that will be identical with embodiment injects dental pulp portion.
(method of testing)
Invite 10 odontologist to estimate the test event of the sample of embodiment 50 to 55 and comparative example 26 to 31.To three test blocks of each sample cutting.In following table 14, modal evaluation result is shown.
Dental pulp exposes to be felt to refer in order to treat the cutting sense of dental pulp when arriving marrow when be cut to enamel portion and dentine portion from occlusal surface after.
Root pipe cleaning refers to by using the upper cut instrument that is called reamer that inserts in the root pipe to wipe the cleaning course that the marrow in the root pipe carries out off.It illustrates the evaluation result of spatter property.
The root pipe enlarges the expansion of the inside of the root pipe that refers to cleaning, so that fill root canal filling.It illustrates expansionary evaluation result.
Table 14
| Sintered body 15 | Packing material | Dental pulp exposes sensation | Root pipe cleaning | The root pipe enlarges |
| Embodiment 50 | Polyvinyl alcohol | B | B | B |
| Embodiment 51 | Polyurethane rubber | A | A | A |
| Embodiment 52 | Silicone rubber | A | A | A |
| Sintered body 16 | Packing material | Dental pulp exposes sensation | Root pipe cleaning | The root pipe enlarges |
| Embodiment 53 | Polyvinyl alcohol | B | B | B |
| Embodiment 54 | Polyurethane rubber | A | A | A |
| Embodiment 55 | Silicone rubber | A | A | A |
| Packing material | Dental pulp exposes sensation | Root pipe cleaning | The root pipe enlarges | |
| Comparative example 26 | Polyvinyl alcohol | D | C | C |
| Comparative example 27 | Polyurethane rubber | D | C | C |
| Comparative example 28 | Silicone rubber | D | C | C |
| Comparative example 29 | Polyvinyl alcohol | D | C | C |
| Comparative example 30 | Polyurethane rubber | D | C | C |
| Comparative example 31 | Silicone rubber | D | C | C |
A: with the similar good result of natural tooth
B: the cutting sense of dentine is different with the cutting sense of marrow, and it can not show fully, yet it has stood training fully.
C: the cutting sense at the interface between dentine and the marrow and natural tooth different.
D: the cutting sense of tooth is very different, and the toughness of dental pulp unconfirmed when exposing, and the sensation when root pipe cleaning enlarges with the root pipe is different.
About embodiment 50 and 53, can experience good dental pulp and expose, though confirm hard slightly root pipe cleaning, can experience root canal fully.Confirm the toughness of marrow, and when comparing, have excellent aspect with embodiment 51,52,54 and 55.
About embodiment 51,52,54 and 55, when comparing, can experience good dental pulp and expose, and can experience root canal RUGEN pipe cleaning or the expansion of root pipe fully with embodiment 50 and 53.Feeling of interface between marrow and the dentine is similar.That removes marrow during root pipe cleaning feels similar.
About comparative example 26 and 28, the state at the interface between the dentine of epoxy resin or melmac and polyvinyl alcohol, polyurethane rubber or the silicone rubber is different, thereby can not reproduce with natural tooth and similarly cut sense.Expose sensation about dental pulp, the sensation when dental pulp exposes is very different.In root pipe cleaning, so because different with natural tooth with the friction sensation of epoxy resin or melmac.In the root pipe enlarged, the sensation that enlarges by the cutting dentine was very different.
(form doubtful dental caries portion)
(embodiment 56)
The Al that 700g is had 0.3 μ m primary particle size
2O
3The heating of powder and 300g (30%) stearic acid is mediated, and injects enamel shape mould then.With the gained injection molded article 600 ℃ of following defats 3 hours, then at 1,500 ℃ of following sintering.The time of staying under this sintering temperature is 15 minutes.As the refrigerative result of natural air, fully form enamel portion.To be applied to the part that will contact by a small amount of epoxy resin that 10% inorganic fluorescent pigment of UV excitated type and 0.2% white carbon black are mixed with, to obtain doubtful dental caries portion with dentine portion with enamel.
Then, enamel portion is put into tooth shape mould, and will have the dentine portion that eburneous epoxy resin injects remnants.In this test, use the dental diamond rod.
(embodiment 57 to 61)
In embodiment 57 to 61, carry out 56 identical operations with embodiment.Be shown in Table 15 with the difference of embodiment 56.
Table 15
| Enamel | The primary particle size of aluminium oxide (μ m) | The amount of aluminium oxide (g) | Binding agent | The amount of binding agent (g) | Skimming temp (℃) | Forming temperature (℃) |
| Embodiment 56 | 0.3 | 700 | Stearic acid | 300 | 600 | 1500 |
| Embodiment 57 | 0.2 | 700 | Stearic acid | 300 | 600 | 1500 |
| Embodiment 58 | 0.3 | 700 | Stearic acid | 300 | 600 | 1600 |
| Embodiment 59 | 0.5 | 700 | Polyvinyl alcohol | 300 | 600 | 1500 |
| Embodiment 60 | 0.2 | 650 | Stearic acid | 350 | 600 | 1400 |
| Embodiment 61 | 0.2 | 650 | Polyvinyl alcohol | 350 | 600 | 1500 |
By cutting sense, abutment tooth formation property and cavity preparation with the similarity evaluation of natural tooth.Obtain good result.Especially, when cutting material during through the interface between dentine layer and the adamantine layer as confirm the cutting sense whether with the similar result of natural tooth, dentine-enamel transitional excellent.
Remove blackboard in dental caries portion, and use black light can confirm whether can correctly remove dental caries portion.
(embodiment 62 to 67)
Use composite, wherein enamel portion is formed by the alumina powder powder sintered compact of embodiment 56 to 61 and dentine portion is formed by the composite that is mixed with by the epoxy resin with 75% alumina powder and 25%, be applied to the zone that doubtful dental caries portion contacts with the dentine of enamel shape part with containing a small amount of epoxy resin that wherein adds 10% the inorganic fluorescent pigment of UV excitated type, to obtain doubtful dental caries portion.Doubtful dental caries portion and dentine portion all are ivory white.
Carry out forming method in the mode identical with embodiment 56.As mould, use dental mold.
Based on cutting sense, abutment tooth formation property and cavity preparation with the similarity evaluation of natural tooth.Obtain good result.Especially, when cutting material during through the interface between dentine layer and the adamantine layer as confirm the cutting sense whether with the similar result of natural tooth, dentine-enamel transitional excellent.
The cutting sense difference of dental caries portion, and use black light can confirm whether can correctly remove dental caries portion.The expert can easily feel the sensation of dental caries portion, yet the abecedarian can cut dental caries portion when his repetition training.
Thereby, confirm to be easy to experience the cutting of dental caries portion.
(embodiment 68)
Make tooth, wherein enamel portion and dentine portion have compositions that the composition identical with embodiment 62 and use be mixed with by the epoxy resin with 20% zinc oxide and 80% as doubtful dental caries portion.Carry out forming method in the mode identical with embodiment 56.As mould, use dental mold.In test, remove dental caries and take the photo of tooth model, thereby can easily take the photo of the state of removing dental caries by the dental X-ray equipment.
Claims (9)
1. tooth for dental arch model, it is used for practice therapeutic, comprises enamel portion and dentine portion, and wherein said enamel portion is formed by the sintered body of inorganic powder, and described dentine portion is formed by resin, composite or binding agent.
2. tooth for dental arch model according to claim 1, wherein said inorganic powder are selected from the group of being made up of alumina type, zirconium oxide class, silica-based, titanium oxide based, aluminium nitride and silicon nitride ceramic powder.
3. tooth for dental arch model according to claim 1, wherein said enamel portion is formed by the sintered body of alumina type ceramic powders.
4. tooth for dental arch model according to claim 3, wherein said enamel portion is by the Al with 0.1 to 1.0 μ m primary particle size
2O
3The sintered body of powder forms.
5. wherein there is space part in tooth for dental arch model according to claim 1 between the sintered particles of the sintered body that constitutes inorganic powder, and described space part floods with water-soluble material, hot melt material or organic material.
6. tooth for dental arch model according to claim 1, it is included between described enamel portion and the described dentine portion, or at its edge, or near the doubtful dental caries portion of the described dentine side the transition part of described enamel portion and described dentine portion.
7. according to each described tooth for dental arch model in the claim 1 to 6, wherein said enamel portion contains and is selected from by SrO, BaO, ZnO, ZrO
2And La
2O
3Heavy metal element oxide in the group of forming, and have x-ray imaging.
8. according to each described tooth for dental arch model in the claim 1 to 6, wherein said dentine portion contains and is selected from by SrO, BaO, ZnO, ZrO
2And La
2O
3Heavy metal element oxide in the group of forming, and have x-ray imaging.
9. tooth for dental arch model according to claim 6, wherein said doubtful dental caries portion contains and is selected from by SrO, BaO, ZnO, ZrO
2And La
2O
3Heavy metal element oxide in the group of forming, and have x-ray imaging.
Applications Claiming Priority (15)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006113082 | 2006-04-17 | ||
| JP113082/2006 | 2006-04-17 | ||
| JP115048/2006 | 2006-04-18 | ||
| JP2006115048 | 2006-04-18 | ||
| JP2006128172 | 2006-05-02 | ||
| JP128170/2006 | 2006-05-02 | ||
| JP128171/2006 | 2006-05-02 | ||
| JP2006128170 | 2006-05-02 | ||
| JP2006128171 | 2006-05-02 | ||
| JP128172/2006 | 2006-05-02 | ||
| JP2006130907 | 2006-05-10 | ||
| JP130907/2006 | 2006-05-10 | ||
| JP142878/2006 | 2006-05-23 | ||
| JP2006142878 | 2006-05-23 | ||
| PCT/JP2007/057148 WO2007119617A1 (en) | 2006-04-17 | 2007-03-30 | Tooth for dental arch model and method of producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101466327A true CN101466327A (en) | 2009-06-24 |
| CN101466327B CN101466327B (en) | 2011-12-28 |
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| CN2007800221623A Expired - Fee Related CN101466326B (en) | 2006-04-17 | 2007-03-30 | Tooth for dental arch model and method of producing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637316A (en) * | 2018-12-17 | 2019-04-16 | 北京大学口腔医学院 | Double-layer resin tooth for the training of oral cavity tooth preparation |
| CN112368759A (en) * | 2018-06-07 | 2021-02-12 | 株式会社德山齿科 | Demonstration appliance |
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| CN102688106A (en) * | 2012-05-08 | 2012-09-26 | 上海上远齿科技术有限公司 | Three-dimensionally printed and rapidly formed resin tooth and preparation method thereof |
| JP5859157B1 (en) * | 2015-04-01 | 2016-02-10 | 株式会社松風 | Compression molded teeth |
| CN105411705A (en) * | 2015-12-19 | 2016-03-23 | 杭州培瑞科技有限公司 | Tooth and making method thereof |
| CN105380724A (en) * | 2015-12-19 | 2016-03-09 | 杭州培瑞科技有限公司 | False tooth and manufacturing method thereof |
| CN106308959B (en) * | 2016-08-26 | 2018-08-21 | 南宁越洋科技有限公司 | Biological active glass ceramic fiber and PEEK resin composite materials artificial tooth and preparation method |
| CN107056319B (en) * | 2017-04-10 | 2020-02-21 | 中国科学院上海硅酸盐研究所 | Silicon nitride-resin bicontinuous phase composite ceramic material and manufacturing method and application thereof |
| CN109887391A (en) * | 2019-03-11 | 2019-06-14 | 四川大学 | Color partition type tooth preparation training pattern |
| CN110974462B (en) * | 2019-12-09 | 2022-03-01 | 深圳光韵达光电科技股份有限公司 | Method for manufacturing teeth based on mold |
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| US3971754A (en) * | 1973-12-10 | 1976-07-27 | Pennwalt Corporation | X-ray opaque, enamel-matching dental filling composition |
| JP3217642B2 (en) * | 1995-06-06 | 2001-10-09 | 日本碍子株式会社 | Method for manufacturing rod-shaped ceramic body |
| EP0803241B1 (en) * | 1996-04-27 | 2006-06-14 | GC Dental Products Corporation | Dental material |
| CN100386286C (en) * | 2004-12-17 | 2008-05-07 | 北京工业大学 | Dental feldspar bioceramic material and its prepn |
-
2007
- 2007-03-30 CN CN2007800221801A patent/CN101466327B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112368759A (en) * | 2018-06-07 | 2021-02-12 | 株式会社德山齿科 | Demonstration appliance |
| CN112368759B (en) * | 2018-06-07 | 2022-06-14 | 株式会社德山齿科 | Demonstration appliance |
| US11779447B2 (en) | 2018-06-07 | 2023-10-10 | Tokuyama Dental Corporation | Demonstration instrument |
| CN109637316A (en) * | 2018-12-17 | 2019-04-16 | 北京大学口腔医学院 | Double-layer resin tooth for the training of oral cavity tooth preparation |
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|---|---|
| CN101466327B (en) | 2011-12-28 |
| CN101466326A (en) | 2009-06-24 |
| CN101466326B (en) | 2012-03-21 |
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