WO2005007009A1 - 歯科用補綴物の製造方法およびそれに用いるキット - Google Patents
歯科用補綴物の製造方法およびそれに用いるキット Download PDFInfo
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- WO2005007009A1 WO2005007009A1 PCT/JP2004/009968 JP2004009968W WO2005007009A1 WO 2005007009 A1 WO2005007009 A1 WO 2005007009A1 JP 2004009968 W JP2004009968 W JP 2004009968W WO 2005007009 A1 WO2005007009 A1 WO 2005007009A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/08—Artificial teeth; Making same
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/70—Tooth crowns; Making thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/08—Artificial teeth; Making same
- A61C13/081—Making teeth by casting or moulding
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/08—Artificial teeth; Making same
- A61C13/083—Porcelain or ceramic teeth
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/08—Artificial teeth; Making same
- A61C13/09—Composite teeth, e.g. front and back section; Multilayer teeth
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/70—Tooth crowns; Making thereof
- A61C5/77—Methods or devices for making crowns
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/20—Methods or devices for soldering, casting, moulding or melting
Definitions
- the present invention relates to a method for producing a dental prosthesis and a kit suitably used for the method (ie, a dental porcelain set).
- Dental prostheses used in the oral cavity are required to have strength capable of withstanding strong mastication force, and are required to have esthetics to make them look like natural teeth. For this reason, conventionally, a dental part in which an exterior part for producing a color and transparency close to those of natural teeth is formed on a base such as a high-strength frame or the like (that is, a body part serving as a base (core) of a prosthesis). Prostheses are being manufactured. Examples of this type of dental prosthesis include those described in Patent Documents 1 and 2.
- powdered porcelain a dental ceramic material also referred to as porcelain; the same applies hereinafter
- the substrate A method of building up with a tool such as a brush on the surface of the frame or the like is widely used.
- the exterior of the dental prosthesis is made of porcelain, and the exterior is appropriately referred to as a “ceramic layer”.
- the above-mentioned dental prosthesis has been constructed by coating the surface of a metal frame with a porcelain material adjusted to the color of natural teeth.
- Prostheses have been used (see, for example, Patent Document 4).
- a metal allergy caused by contact of a metal with a living body, and an opaque underlayer (or an undercoat layer) provided for hiding a metal color are caused by natural allergy.
- Problems such as not being able to obtain the original color tone of the tooth are solved Alternatively, there is an advantage of being alleviated.
- the all-ceramic prosthesis for example, a frame composed of crystallized glass such as lithium silicate glass or a frame composed of a ceramic sintered body, and an exterior part made of glass porcelain, Some of them form a ceramic layer.
- Patent Document 4 discloses a two-phase porcelain composition in which a leucite crystal phase is dispersed in a feldspathic glass matrix.
- the ceramic prosthesis composed entirely of the above-mentioned crystallized glass has a relatively low mechanical strength and toughness, and therefore cannot be used for a bridge or the like that requires strength. Applications are limited.
- examples of the ceramic sintered body constituting the frame include spinel, anoremina, and zirconia. Among them, especially, frames made of alumina are often used, but alumina-spinel cannot be said to have sufficiently high mechanical strength and toughness for bridge applications. Therefore, even with these ceramic prostheses using alumina and spinel frames, the bridge can be applied only to the front teeth, and can be used only for single crowns in molars where a large mastication force acts.
- zirconia is superior in mechanical strength and toughness in a ceramic sintered body, so that not only three bridges including molars but also many bridges such as five or six, Full mice are also possible.
- Zircoure has the advantage of having a favorable color tone for dental use.
- the mechanical strength is obtained by partially stabilizing Y 0 by dissolving 3 (mol).
- Patent Document 1 Japanese Patent Application Laid-Open No. 7-23986
- Patent Document 2 JP-A-2000-139953
- Patent Document 3 International Publication No. WO01Z021088 pamphlet
- Patent Document 4 Patent No. 3351701
- At least two decorative layers are coated on a substrate so as to express a color and light transmittance (transparency) closer to a natural tooth on a surface of a dental prosthesis (for example, a crown). May form a part.
- These two layers are subjected to a heat treatment in sequence to form a frame, etc.
- the lower layer previously formed on the base surface is softened during the heat treatment for forming the upper layer of the exterior part, and thus the porcelain material for forming the upper layer is fixed. In some cases, it was caused to flow along with the flow. When such a flow occurs, the thickness of the underlying layer changes partially, possibly exposing the frame.
- the desired color tone and transparency cannot be obtained due to the partial change in the thickness and the exposure of the frame, and the desired shape of the prosthesis cannot be obtained.
- another decoration layer (hereinafter, referred to as “embedded coat layer”) is formed on the surface of a decorative layer serving as a base (hereinafter, referred to as “base coat layer”) coated on a substrate by an embedding method.
- base coat layer a decoration layer coated on a substrate by an embedding method.
- the base coat layer is formed. It is required that when the porcelain material for forming the embedded coat layer is inserted into the surface of the base material, the base coat layer (strictly speaking, the ceramic material forming the coated layer) does not move.
- a method and a material for example, a porcelain for forming an underlayer and a porcelain for forming an embedded coat layer which can realize this demand.
- a first object of the present invention is to form a base coat layer even when two or more coat layers are formed on a substrate. It is an object of the present invention to provide a method for manufacturing a dental prosthesis that can be formed with an intended thickness, particularly a manufacturing method using an embedding method, and a kit (that is, a combination of materials) that is suitably used in the manufacturing method. . Further, a second object is to provide a method of manufacturing a dental prosthesis in which the frame and the ceramic layer are less likely to crack even when the substrate, that is, the frame is made of zirconia, and a dental porcelain set that can be suitably used for the method. Kit). Means for solving the problem
- the gist of the method for manufacturing a dental prosthesis of the first invention for achieving the first object is as follows: (a) a dental molding material; Preparing; (b) forming a base coat layer on at least a part of the surface of the base using a first porcelain mainly composed of ceramic; and (c) forming a base with the base attached. A step of forming a mold having a predetermined gap on the surface of the base coat layer; and (d) forming the first porcelain on the mold at a predetermined filling temperature. A second porcelain mainly composed of a ceramic having a composition different from that of the first porcelain, wherein the second porcelain has a lower viscosity at the filling temperature than the first porcelain. Forming a built-in coat layer on at least a part of the surface of the base coat layer. .
- kits of the second invention for achieving the first object is that an exterior part having at least two coat layers is formed on the surface of the base of the dental prosthesis.
- a kit comprising: (a) a first raw material mainly composed of ceramic for preparing a first porcelain material for forming a base coat layer on the surface of the base; A second raw material mainly composed of ceramics for preparing a second porcelain material for forming a coat layer by incorporation into at least a part of the surface of the layer, wherein the viscosity at a predetermined incorporation temperature is the second material.
- One raw material strength is to include a second raw material prepared so as to constitute a second porcelain characterized by having a viscosity lower than that of the first porcelain constituted.
- the gist of the method for producing a dental prosthesis of the third invention for achieving the second object is that at least two ceramic layers are fixed to the surface of the zirconia frame.
- the ceramic layer is formed by: (a) SiO in the range of 66.0 to 72.0 (% by mass), and A1 in the range of 13.5 to 17.8 (% by mass).
- Li Li 0 in the range of 0.05 to 0.31 (% by mass), Na ⁇ in the range of 1.3 to 6.5 (% by mass),
- Mg ⁇ in the range of 0.05 to 0.55 (% by mass)
- Sb 0 in the range of 0.2 to 2.2 (% by mass)
- Ce in the range of 0.1 to 3 (% by mass) B
- B in the range of 0.1 to 3 (% by mass)
- the gist of the dental porcelain set (that is, kit) of the fourth invention for achieving the second object is that at least two ceramic layers are fixed to the surface of the zirconia frame.
- a dental porcelain set comprising at least two porcelains for forming each of those ceramic layers used to produce a dental prosthesis by forming: (a) 66.0 oxide equivalent; SiO in the range from 1 to 72.0 (% by mass), A10 in the range from 13.5 to 17.8 (% by mass), Li ⁇ in the range from 0.05 to 0.31 (% by mass), and 1.3 to 6.5 (% by mass) Na ⁇ , 1 ⁇ in the range of 8.7 to 12.5 (% by mass), and 0.1 ⁇ in the range of 0.1 to 0.5 (% by mass)
- K 0 in the range of 8.0 to 14 ⁇ 0 (mass 0/0), CaO in the range of 0.2 to 1.5 (wt 0/0), MgO in the range of 0.05 to 0.55 (wt%), 0.2 to 2.2 (% By mass)
- the embedded coat layer is formed by inserting into at least a part of the base coat layer serving as the base. Laminate.
- the viscosity of the second porcelain forming the filling coat layer at that filling temperature is lower than that of the first porcelain forming the base coat layer, the movement of the underlying coat layer is preferably performed. Is suppressed.
- the viscosity of the first porcelain is higher than that of the second porcelain, so that the fluidity of the first porcelain is higher than that of the second porcelain. Lower.
- the first porcelain is less likely to be affected by the flow of the second porcelain even at a high temperature at the time of embedding, so that the first porcelain has a higher fluidity before the first porcelain moves.
- the second porcelain material is inserted between the mold and the undercoat layer having a predetermined shape (that is, the gap). As a result, the movement of the first porcelain material, that is, the already formed base coat layer, in the flow direction of the second porcelain material to be inserted thereafter is suppressed.
- a dental prosthesis having at least two coat layers (that is, decorative layers) having an exterior part having excellent aesthetics by using the embedding method. it can. Further, by further building up the porcelain as needed, it is possible to obtain a dental prosthesis (for example, an artificial crown) which is closer to natural teeth and has excellent aesthetics.
- the first raw material for preparing the first porcelain, and the viscosity at a predetermined filling temperature are lower than those of the first porcelain. Since it includes the second raw material for producing the second porcelain, the production method of the first invention can be easily implemented. That is, it is possible to easily manufacture a dental prosthesis having an exterior part having at least two coat layers (ie, decorative layers) and having excellent aesthetics. According to the manufacturing method of the third invention, in the first step of forming the ceramic layer for manufacturing the dental prosthesis, the first ceramic layer having the first composition is formed in the first step.
- the second ceramic layer of the second composition is fixedly formed so as to cover the first ceramic layer. Therefore, since the first ceramic layer and the second ceramic layer have the first composition and the second composition, respectively, both have the same thermal expansion coefficient as the frame made of zirconia. Generation of cracks in the frame or the ceramic layer, that is, the exterior part due to the difference in the coefficient of thermal expansion during the cooling process of the heat treatment. Therefore, a dental prosthesis can be manufactured without generating cracks in the frame made of ginoreconia and the ceramic layer.
- the first ceramic layer may be formed to cover the entire surface of the frame, or may be formed by exposing a part thereof. Further, “covering the first ceramic layer” is not limited to completely covering the first ceramic layer, but also includes covering a part of the surface.
- the second ceramic layer is formed.
- the first ceramic layer is prevented from softening and flowing or deforming. For this reason, a dental prosthesis can be manufactured while maintaining the lower thickness of the two ceramic layers, that is, the second ceramic layer, at the desired thickness.
- the first ceramic layer of the first composition and the second ceramic layer of the second composition are generated by firing or heat treatment, respectively. Since it contains the material and the second porcelain, it can be suitably used in the method for producing a dental prosthesis of the third invention.
- SiO is a basic component for forming a glassy state, 66.0 (mass) %),
- the viscosity at a use temperature such as incorporation becomes too low, and if it exceeds 72.0 (% by mass), the glass softening point becomes too high.
- This ratio is determined so that the viscosity is higher than the second ceramic layer at the operating temperature (for example, the incorporating temperature) of the second ceramic layer.
- A10 also enhances transparency, acid resistance and water resistance, and also increases viscosity.
- Li 0 is a component for increasing the coefficient of thermal expansion and lowering the softening point so as to control them.
- Sb 0 is a component for preventing the glass from yellowing due to Ag ion. When the content is less than 0.1 (% by mass), the effect of preventing the yellowing is hardly obtained. Some parts do not melt.
- Ag is not contained in the main component of the third invention, but since dental prostheses containing Ag are also commonly used, this can be a source of contamination.
- CeO is a component for adjusting the softening point, but if it exceeds 3 (% by mass), the glass is colored yellow.
- B 0 is also a component for adjusting the softening point, but if it exceeds 3 (% by mass), the water resistance becomes poor. Therefore, it is necessary that each is within the above range.
- SiO is 67- 68 (mass 0/0)
- A1 0 is 15.5- 16.5 (mass 0/0)
- Li 0 is 0.08- 0.12 (mass 0 / 0)
- Na 0 is 4,5 5.2 (mass 0/0)
- each main component in the second ceramic layer (that is, the fired product or heat-treated product of the second porcelain) is the same as that in the case of the first ceramic layer, and the composition ratio is determined. The reason is almost the same.
- the proportions of the components that have a large effect on the viscosity are different.
- the proportions of the other components are also slightly different from those of the first ceramic layer. In other words, the proportion of SiO is reduced and the proportion of A10 is increased.
- SiO is 63.5- 64.5 (mass 0/0)
- A1 0 is 15.5- 16.5 (mass 0/0)
- Li 0 is 0.08- 0.12 (mass 0/0)
- Na 0 is 4,5 5.2 (mass 0/0)
- the ⁇ -type forming step includes forming a model layer having a predetermined shape made of a material capable of being incinerated and removed on at least a part of the surface of the undercoat layer.
- a matrix typically formed from a phosphate-based or gypsum-based material referred to as a casting material. After the matrix is cured, the model layer is incinerated and removed to form a shape having the voids corresponding to the model layer.
- a ⁇ pattern having a void having a shape and a size corresponding to the model layer can be formed. Therefore, by forming a model layer having a desired shape on at least a part of the surface of the undercoat layer, a built-in coat layer having the same shape as the model layer can be accurately formed.
- the base is a metal or ceramic frame.
- Metal or ceramic frames have a sufficiently high mechanical strength even at high temperatures, and can be suitably used as a base for dental prostheses for shaping the exterior by the embedding method. it can.
- a porcelain having a viscosity at the filling temperature of at least 1.5 times the viscosity of the second porcelain is used as the first porcelain.
- the first invention is characterized in that the first porcelain is The viscosity is in the range of 2 ⁇ 10 6 —5 ⁇ 10 7 (cP), and the viscosity of the second porcelain is in the range of 1 ⁇ 10 6 —3 ⁇ 10 7 (cP).
- the movement of the base coat layer can be suitably prevented.
- the porcelain can be incorporated into the details of the voids provided in a square shape without excessive force.
- the first porcelain and the second porcelain each include a glass composition substantially composed of an oxide having the following content. It is the main component.
- the glass composition contained in the first porcelain is 100% by mass as a whole
- the glass composition contained in the second porcelain is 60-70 (% by mass) of SiO, 10-20 (% by mass) of A10, 5-15 ( ZrO 0 mass%), 3- 15 (mass 0/0) of Na 0, 0.1 3 Li 0 (mass 0/0), 0 3 (weight 0/0), 0.1 5 (mass 0 / CaO of 0), CeO 0.1 one 5 MgO (mass 0/0), 0 3 B 0 (mass 0/0), 0 3 (wt%) and, 0-7 (mass
- the ceramic contained in the first porcelain mainly contains the glass composition
- a base coat layer having a natural color close to natural teeth can be easily formed.
- the ceramic contained in the second porcelain is mainly composed of the glass composition, it is possible to easily form a transparent coating layer close to natural teeth and having a sense of transparency. .
- an exterior part having a natural appearance close to natural teeth can be formed.
- the kit is such that the viscosity of the first porcelain at the charging temperature is at least 1.5 times the viscosity of the second porcelain.
- the viscosity of the first porcelain and the viscosity of the second porcelain at the included temperature are reduced at least.
- the kit has a viscosity of the first porcelain at the charging temperature in a range of 2 X 10 6 to 5 X 10 7 (cP),
- the first raw material and the second raw material are each prepared such that the viscosity of the second porcelain falls within the range of S1 X 10 6 —3 X 10 7 (cP).
- the base material at the time of embedding can be obtained.
- the movement of the coat layer can be more effectively prevented.
- the porcelain can be incorporated into the details of the voids provided in a square shape without excessive force.
- the kit is a kit in which the first raw material and the second raw material each include substantially the following oxides. It is mainly composed of a composition.
- the glass composition contained in the first raw material is 100 (mass%) as a whole, 40-75 (mass%) SiO, 10-20 (mass%) A10, 5-15 (mass%) %) 0, 2-10 (mass
- the glass composition contained in the second raw material is 60-70 (% by mass) of SiO, 10-20 (% by mass) of A10, 5-15 (% 0%), ZrO 3-15 (mass 0/0) of Na 0, 0.1 3 Li 0 (mass 0/0), 0 3 (weight 0/0), 0.1 5 (mass 0 / 0 ) CaO, 0.1-15 (mass%) MgO, 03 (mass%) 80, 03 (mass%) CeO, and 07 (mass%)
- the kit disclosed herein uses the first porcelain and the second porcelain in the form used in the production method of the first invention as a first raw material and a second raw material, respectively. As it is.
- the "dental prosthesis” is not particularly limited as long as it is a prosthesis to be mounted in the oral cavity and can be manufactured by the method disclosed herein.
- the dental prosthesis includes one of lost teeth such as crowns, bridges, covered crowns, inlays, onlays, and dentures treated in the dental field. Everything that makes up part or all is included.
- forces applied to various dental prostheses specifically, a bridge, a full mouse, a crown, a covered crown, and the like are exemplified.
- the base namely, the core member or the frame of the prosthesis
- the base used in the manufacturing method of the first invention may be any of various dental molding materials. Not limited to materials. Any conventionally known material having sufficient strength as a substrate of a dental prosthesis can be used.
- metal or ceramic is preferable because it is heat resistant and can achieve high mechanical strength.
- the metal material a material that does not easily affect the living body is preferably used. Specific examples include nickel, cobalt, radium, iridium, gold, silver, copper, platinum and the like. Also, an alloy material formed by combining two or more of these metals at a predetermined compounding ratio may be used. Of these, gold, platinum, palladium, silver, and alloys of these metals, which have little effect on the living body, are particularly preferable.
- the ceramic material constituting the base conventionally known materials having excellent biocompatibility can be used without particular limitation. In particular, alumina, zincolecone, spinel, mullite and the like which are excellent in strength and corrosion resistance are suitable.
- Ceramic materials are preferable in that they are closer to natural teeth in color tone and transparency than metal. Of these, zircoure is particularly suitable because it has a white color close to the color of natural teeth.
- the shape of the base such as the frame is appropriately determined according to the position and shape of the tooth to be prosthetic. For example, it can be formed in accordance with the shape of a tooth obtained by cutting off a tooth decay or a damaged tooth.
- the base can be easily and accurately manufactured by injection molding using a tooth model having a desired shape.
- the base may be a preformed body having an existing tooth shape and / or a shape corresponding to a mounting site in the oral cavity.
- Any substrate available as a substrate (such as a frame) for a dental prosthesis can be used.
- the base or the frame is not limited only to the main body of the base and the frame, but one or two or more coatings of different materials are previously applied on the surface of the main body. I'm sorry.
- the term “substrate or frame” includes such a pre-coated one. This is because the present invention can also be implemented by forming the base coat layer or the first ceramic layer on the surface of such a base.
- ceramic-based porcelain conventionally used for forming an exterior part of a dental prosthesis is used.
- a material can be used, a material having a relatively high viscosity under high-temperature conditions when the second porcelain described later is incorporated is preferable.
- a ceramic material having a composition capable of forming a base coat layer that makes the color of the base material difficult to see or a color tone close to natural teeth and / or transparency (light transmission) by combining with the color of the base material is used. I like it.
- the coefficient of thermal expansion is close to that of the substrate. Similar, ceramic material is preferred.
- the ceramic as the main component of the first porcelain is not particularly limited as long as it is suitable for dental use.
- the use of oxide ceramics is preferred to achieve good aesthetics of the prosthesis.
- an oxide ceramic containing P ⁇ , F ⁇ , La S, Sb O, Ba ⁇ , Sr ⁇ , ZnO, TiO, CeO, Y ⁇ , Tb ⁇ , and Fe ⁇ as components. It is preferable to contain A10, K0, Na ⁇ , and Li ⁇ , in addition to SiO, in order to express a color close to that of a natural tooth, and if necessary, further contain ZrO, Ca ⁇ , Mg ⁇ , and / or May contain SnO.
- a material (porcelain) having a glass composition composed of these oxides as a main component is particularly preferred for improving aesthetics. For example, assuming that the entire glass composition is 100 (% by mass), the oxide having the following content: SiO 2
- Ceramic material mainly composed of a glass composition substantially composed of 30 (% by mass), for example, a ceramic material substantially consisting only of the glass composition, or another crystal in addition to the glass composition. It is preferable to use a ceramic material containing a conductive ceramic component in a content of 50% by mass or less (preferably 30% by mass or less) of the total amount of the ceramic.
- the first porcelain for forming the undercoat layer a material mainly composed of crystallized glass (glass ceramic) is preferable.
- the glass composition comprising the oxide having the above composition is crystallized glass.
- the first porcelain can include other components while being mainly composed of ceramic.
- a dispersion medium for dispersing the ceramic powder may be included.
- a coloring agent such as a pigment that can be used in the dental field to express a desired color may be contained.
- a fluorescent material may be contained in order to give the same fluorescence as that of the natural teeth.
- any conventionally known means may be used.
- the first porcelain can be applied (filled) to a desired shape and thickness on at least a part of the surface of the base using a brush or the like. In the case of using this means, application is facilitated.
- the ceramic powder and other additives may be dispersed in a suitable dispersion medium.
- the dispersion medium is not particularly limited.
- a dedicated liquid for example, propylene glycol, ethylene glycol, glycerin
- a resin for example, polymethyl methacrylate, polyethylene methacrylate, polyisobutyl methacrylate, Acryl-based resins such as poly-n-butyl methacrylate, vinyl-based resins such as poly-butyl acetate, and cellulose-based resins such as nitrocellulose, ethylcellulose, and cellulose acetate butyrate.
- the base coat layer may be formed by filling the first porcelain material on at least a part of the surface of the base using a diamond shape having a desired shape and thickness.
- the undercoat layer is formed by the same embedding method as in the case of forming the embedding coat layer, which will be described in detail below, if it is a conventionally known method. can do.
- the first porcelain is applied or embedded on the surface of the substrate by the method described above, and then increases the bonding strength with the substrate and removes the organic component used at the time of application. Fired to remove.
- the firing temperature is appropriately determined depending on the composition of the first porcelain material, the shape of the undercoat layer, and the like, but is usually 600 to 1600 (° C), preferably 700 to 1500 (° C), and more preferably 800 to 1300. (° C), more preferably 900-1100 (° C).
- the firing atmosphere is not particularly limited. Typically, it is performed in the atmosphere or under reduced pressure.
- the undercoat layer may be formed on any surface of the substrate in order to achieve a desired color and transparency.
- the undercoat layer may be formed so as to cover almost the entire surface of the substrate. It may be formed only on a part of the surface of the fringe. In particular, it is preferable to form so as to cover the entire surface of the substrate. This makes it difficult to see the outer surface of the base.
- the shape and thickness of the dental prosthesis are not particularly limited, and are appropriately determined depending on the type of the dental prosthesis or the color and transparency required. For example, in the case of a denture such as a crown or a bridge, the thickness is about 0.01 to 0.3 (mm), preferably O.l (mm) or less (for example, about 0.01 to O. l (mm)) on the base body. It is preferable to form the base coat layer of (3).
- the object is There is no particular limitation on the method of forming the mold for forming the embedded coat layer.
- a model layer that can be incinerated and removed is formed on the surface of the substrate on which the base coat layer has been formed.
- the shape of the model layer at this time is a shape corresponding to the target embedding coat layer.
- the model layer is buried in a ⁇ -shaped matrix composed of a suitable curable investment material, and the matrix is cured.
- the model layer is incinerated and removed in an appropriate furnace, so that a force S can be formed to form a ⁇ shape having a void corresponding to the model layer.
- Such a model layer needs to be made of a material that can be incinerated, and preferably has excellent moldability.
- a material that can be incinerated for example, wax and resin suitable for dental use are mentioned as suitable materials.
- wax is preferable because of good moldability.
- "removable by incineration” means that the material constituting the model layer can be lost at a high temperature.In addition to typical burning, the material is melted at a high temperature and passes through one of the outflow routes. ⁇ includes removal from the mold.
- the incineration temperature is appropriately selected depending on the material, but is usually about 600 to 1200 (° C), preferably about 800 to 1000 (° C).
- the firing time of the mold is usually about 20 minutes to 3 hours (for example, 30 minutes to 12 hours).
- the ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ -shaped matrix is composed of a material having curability and good moldability.
- Any commercially available dental implant material can be used.
- investment materials such as gypsum, phosphate, ethyl silicate, and alumina cement can be used.
- the workability is good, it is preferable to be a room temperature curable.
- the viscosity at the filling temperature is lower than the viscosity of the used first porcelain at the same temperature.
- various conventionally known porcelain materials used for forming the exterior part of the dental prosthesis In particular, in the case of forming an exterior part on or near the surface of the crown, it is preferable to use a ceramic (particularly a glass composition) mainly having a high transparency and composition.
- the strength of the ceramic component which is the main component of the second porcelain, is not particularly limited because it can vary depending on the content of the dental prosthesis.However, in order to realize good aesthetics of the prosthesis, the first component is used.
- oxide ceramics similar to those exemplified for porcelain is preferred. example For example, the inclusion of SiO, Al O, K 0, Na 0, Li 0, CaO, and MgO is suitable for expressing transparency close to that of natural teeth, and ZrO, B 0 for quality improvement. , CeO and / or Sb 0 may be contained. It is particularly preferable to use a ceramic material containing a glass composition composed of these oxides as a main component from the viewpoint of improving aesthetics. For example, assuming that the entire glass composition is 100 (% by mass), the oxide having the following content: SiO 60 70 (% by mass)
- A1_rei 10- 20 (mass 0/0), K_ ⁇ 5-15 (mass 0/0), Na_ ⁇ 3- 15 (wt%), Li_ ⁇ 0.1
- Ceramic material mainly composed of a glass composition substantially composed of O 3 (% by mass), CeO 0-3 (% by mass), and Sb 00-7 (% by mass).
- a ceramic material consisting solely of a glass composition, or other crystalline ceramic components added to the glass composition at a content of 50% by mass or less (preferably 10% by mass or less) of the entire ceramic. The use of ceramic materials is preferred, including.
- the second porcelain forming the embedding coat layer may be mainly composed of crystallized glass (glass ceramic).
- the glass composition made of the oxide having the above composition may be crystallized glass.
- the second porcelain may contain other components while being mainly composed of ceramic.
- a coloring agent such as a pigment that can be used in the dental field to express a desired color
- a fluorescent material for imparting fluorescence may be contained.
- the second porcelain has a lower viscosity than the first porcelain at the mixing temperature of the second porcelain.
- the viscosity difference between the first porcelain and the second porcelain in this temperature range is not particularly limited as long as the second porcelain is lower than the first porcelain. It is particularly preferred that the viscosity of the first porcelain be at least 1.2 times, preferably at least 1.5 times, preferably at least 2 times. The greater the difference in viscosity, the higher the flow prevention effect of the first porcelain at the time of filling.
- the viscosity of the first porcelain (viscosity at a predetermined filling temperature; the same applies hereinafter) is approximately 2
- X 10 6 5 X 10 7 (a l centipoise (cP) can be calculated as O.OOl (Pa 's).) (CP) can be set in the range of.
- the viscosity of the second porcelain is set in the range of approximately 1 X 10 6 — 3 X 10 7 (cP). obtain.
- the first porcelain is preferably a material (composition) forming a ceramic body having a thermal expansion coefficient similar to that of the ceramic.
- the viscosity of the second porcelain in the range of 2 X 10 6 7 X 10 6 (cP) It is preferable to set.
- the viscosity force of the first porcelain S8 X 10 6 - range of 1.5 X 10 7 (cP), and, second porcelain viscosity 3 X 10 6 - range of 7 X 10 6 (cP) It is preferable to set
- the first porcelain is preferably a material (composition) forming a ceramic body having a thermal expansion coefficient similar to that of the ceramic.
- the viscosity of the first porcelain 1.3 X 10 7 - range of 5 X 10 7 (cP)
- the viscosity of the second porcelain in the range of 1 X 10 6 1.2 X 10 7 (cP) It is preferable to set.
- second porcelain viscosity 5 X 10 6 - 1.2 X 10 7 of (cP) It is preferable to set the range.
- the form (use) of the second porcelain is not particularly limited.
- an ingot made of a glass composition having the above composition which may be crystallized glass.
- a powerful glass ingot can be formed by any conventionally known means, for example, after crushing and mixing the ceramic raw materials constituting each component of the target glass composition, heating and melting, filling a mold of a desired size, and cooling. Can be obtained.
- it may be a powdery porcelain mainly composed of ceramic powder.
- a method of inserting the second porcelain material into a square shape a method of pressing the porcelain material under heating and pressing it can be mentioned.
- This method is suitable as a method using the glass ingot.
- An appropriate heating time for softening the material is usually about 5 minutes to 3 hours. It can be 10 minutes to 1 hour.
- Pressing is performed at a pressure of about 0.15 (MPa), typically at a pressure of 0.1 l (MPa).
- the heating temperature can be set to a temperature in which the ceramic contained in the porcelain can be softened, usually 400 to 1500 (° C). Typically, it is about 600 1300 (° C), preferably about 800 1200 (° C).
- the application temperature is determined by the composition of the second porcelain to be used and the composition to be formed, as long as the temperature is within the temperature range appropriately adopted according to the material in the application method conventionally known in the dental field. It can be appropriately determined according to the shape of the sole coat layer and the like. Usually, the temperature is set within the range of 600 to 1500 (° C), and is typically 800 to 1300 (° C), preferably about 900 to 1200 (° C).
- Cooling may be started immediately after the filling of the second porcelain is completed.However, in order to enhance the formability of the coat layer, a predetermined time (e.g. (5 minutes to 1 hour, preferably about 5 to 30 minutes).
- a predetermined time e.g. (5 minutes to 1 hour, preferably about 5 to 30 minutes).
- the embedding coat layer may be formed on any surface portion of the undercoat layer in order to achieve a desired color and transparency, for example, so as to cover the entire surface of the undercoat layer. It may be formed on a part of the surface which may be formed. In order to obtain an appearance closer to natural teeth in combination with the color of the undercoat layer, it is preferable that the undercoat layer be formed so as to cover the entire surface.
- the shape and thickness of the embedding coat layer may vary depending on the content of the dental prosthesis, and are appropriately determined in order to achieve a desired color and transparency. For example, if the prosthesis of interest is a crown, its thickness may typically be on the order of 13 (mm) in the thickness of the thickest part.
- the extracting means is not particularly limited. In the case of Type II formed from a general hardenable casting material, Type II can be broken and taken out. Alternatively, it is also possible to form the mold ⁇ so that it can be opened and closed, and open the mold ⁇ ⁇ ⁇ ⁇ to take out.
- One or more other coat layers may be separately formed on the surface on which the embedded coat layer is formed in order to further improve the aesthetics.
- Such an additional coat layer may be formed by applying (building up) a porcelain material with a brush as described above, or may be formed by the embedding method as described above.
- a porcelain material having a viscosity lower than that of the second porcelain material formed with the firstly formed buried coat layer (which can be regarded as a base coat layer) ( It is preferable to use a third porcelain) to form a coat layer.
- the first raw material and the second raw material included in the kit disclosed herein are configured so that the first porcelain and the second porcelain having the viscosity difference as described in the above-described production method can be prepared, respectively. It should just be.
- the first raw material included in the kit is a main material of the first porcelain described in the above-mentioned manufacturing method.
- the main component is ceramic which is the body. Typically, such ceramics are included in powder form. If desired, other additives (eg, pigments) may be included.
- the kit may contain a slurry (or a base) suitable for preparing porcelain in the form of a dispersion medium ice or the like separately from or mixed with the ceramic powder.
- the first porcelain in any of the forms described in the above manufacturing method may be included as it is as the first raw material.
- the second raw material included in the kit of the second invention has, as a main component, the ceramic which is the main component of the second porcelain described in the above-mentioned production method.
- the ceramic is included in powder form.
- other additives eg, pigments
- the kit may include, as the second raw material, an ingot made of a ceramic which is a main component of the second porcelain.
- the second porcelain in any of the forms described in the above manufacturing method can be included as it is as the second raw material.
- the first ceramic layer is higher than the second ceramic layer at a heat treatment temperature for generating the second ceramic layer in the second step.
- High viscosity That is, the first porcelain has a higher viscosity than the ceramic layer generated from the second porcelain at the heat treatment temperature for generating the ceramic layer from the second porcelain. Things. That is, the first ceramic layer, the second ceramic layer, the first porcelain, and the second porcelain are preferably selected so as to satisfy such a condition within the range of the composition.
- the heat treatment temperature is a force S determined according to the composition of the first ceramic layer and the second ceramic layer, for example, in the range of 750 to 1100 (° C), more preferably 950 to 1050 ( ° C).
- the second step is performed by filling a predetermined gap in which a part of an inner wall surface is formed by a surface of the first ceramic layer with a predetermined fluid material. It forms a ceramic layer. That is, the second step is to form a second ceramic layer by injecting or injection molding a fluid material, that is, a second porcelain, on the first ceramic layer.
- the second step can be carried out by a method in which powdery porcelain is kneaded with a predetermined solvent and is laid on the surface of the frame with a tool such as a brush.
- the dental porcelain set of the present invention is particularly suitably applied to a manufacturing method for filling such voids. In such a manufacturing method, the ceramic is formed with high shape accuracy and thickness accuracy.
- a backing layer can be provided, but the second porcelain is pressed against the first ceramic layer with relatively strong force in order to spread the second porcelain throughout the void. Therefore, the effect determined so that the viscosity of the second ceramic layer at the same temperature is lower than that of the first ceramic layer becomes more remarkable as compared with the case of building up.
- the void is filled with the fluid material whose fluidity has been enhanced by heating.
- the fluidity material that is, the second porcelain material
- the fluidity material is heated when filling, thereby increasing the fluidity, so that the previously formed first ceramic layer is also heated to a high temperature. Therefore, the effect of determining the composition of the second ceramic layer (that is, the second porcelain) at a temperature during the execution of the second step so that the viscosity of the second ceramic layer is sufficiently lower than the viscosity of the first ceramic layer is reduced. It becomes even more noticeable.
- the second porcelain material is filled in the gap as described above, for example, an ingot having the second composition is inserted from the opening of the gap, and is heated and softened while being pressed.
- the force by which the indentation method is suitable For example, the material in the form of a powder may be filled through the opening.
- a heating time suitable for softening the second porcelain is, for example, in the range of about 5 minutes to 13 hours, more preferably in the range of 10 minutes to 11 hours.
- the pressing force at the time of pushing is in the range of 0.1 to 5 (MPa), more preferably 1 (MPa) or less.
- the heating temperature may be a temperature at which the second porcelain is sufficiently softened, for example, in the range of 750 to 1100 (° C), and more preferably in the range of 950 to 1050 (° C).
- the ingot can be manufactured by a known suitable method.For example, after a raw material prepared so as to have a desired composition is crushed and mixed, it is heated and melted to form a mold having a desired size. Filling and cooling can provide the power to gain.
- the first ceramic layer is filled by filling a predetermined fluid having a part of an inner wall surface defined by a surface of the frame with a predetermined fluid material. Is formed. That is, the first ceramic layer in addition to the second ceramic layer can be formed by molding or injection molding.
- the first ceramic layer is not limited to the above-described embedding or injection molding, and is formed by an appropriate method selected from various known methods, similarly to the undercoat layer. obtain.
- the thickness dimension of the first ceramic layer is appropriately determined according to the shape, color tone, and the like required of the prosthesis. In the case of a denture such as a force crown or a bridge, the thickness is determined on the frame. It is in the range of about 0.01-0.3 (mm), for example, about 0.2 (mm).
- the thickness dimension of the second ceramic layer is also appropriately determined to achieve a desired color tone and transparency.
- a desired color tone and transparency For example, in the case of a denture such as a crown or a bridge, 0.8 to 1.5 (mm) A thickness within a range, for example, about 10 (mm) is preferable.
- the second step is a step of forming a model layer of a predetermined shape having a material strength capable of being incinerated and removed on at least a part of the surface of the first ceramic layer; A step of burying the model layer and a step of curing the ⁇ -type constituent material and then burning off the model layer to form a ⁇ -type provided with the void corresponding to the model layer.
- the ⁇ -type constituent material is made of, for example, a phosphate-based material, a gypsum-based material, an ethyl silicate-based material, an alumina cement-based material or the like, which is called a casting material, and is particularly preferably a material that hardens at room temperature.
- the model layer needs to be made of a material that can be incinerated and removed, and preferably has excellent moldability.
- the first ceramic layer and the second ceramic layer that is, the first porcelain and the second porcelain are respectively composed of the components of the first composition and the second composition, And unavoidable impurities.
- the ceramic layer and the porcelain according to the present invention may include a sub-component for adjusting a color tone in addition to the main component.
- the inevitable impurities include, for example, a small amount of Fe 0.
- the auxiliary component is at least one of a pigment, a fluorescent material, and an emulsifier.
- Emulsifiers include, for example, ZrO, SnO, TiO, Al 2 O, CeO and the like.
- the first ceramic layer and the second ceramic layer is 9.1 X 10- 6 to 10.3 X 10- 6 (/ ° C in the temperature ranges of 25 ⁇ Itaru 500 (° C) ).
- the thermal expansion coefficient of the Jirukoyua is 10 X 10- 6 (/ ° C ) about as described above, the ceramic layer and breakage of suitably suppressed frames It is.
- the secondary components of the second ceramic layer are determined such that the transparency is higher than that of the first ceramic layer.
- a dental prosthesis having an exterior part having excellent aesthetics and comprising at least two first ceramic layers and a second ceramic layer (decorative layer) is obtained.
- a porcelain material is further laid on part or all of the surface of the second ceramic layer, so that a dental prosthesis closer to natural teeth and excellent in aesthetics can be obtained.
- Such additional porcelain may be formed by embossing or by embedding. When forming by embedding, it is preferable to select a material having a lower viscosity at the same temperature than that of the second ceramic layer.
- the first step and the second step include heating when forming the first ceramic layer and the second ceramic layer on the frame or the first ceramic layer, respectively.
- a treatment or firing treatment is performed.
- the bonding strength with the frame or the ceramic layer provided on the lower side can be increased by heating.
- the heat treatment is also a step of burning off the organic substances.
- the heat treatment temperature is appropriately determined according to the composition of each of the first ceramic layer and the second ceramic layer, and is preferably in the range of 950 to 1100 (° C). More preferably, it is in the range of 1000-1050 (° C).
- the treatment atmosphere is not particularly limited, but is, for example, in the air or under reduced pressure.
- the first porcelain and the second porcelain are mixed with a compound that generates an oxide at a glass melting temperature in a range of, for example, 1000 to 1500 (° C), and is mixed with, for example, air.
- a medium for example, 1000 (° C) or more
- this is further pulverized, for example, at a temperature in the range of 800 to 1100 (° C) for about 30 to 60 minutes. It is manufactured by heat treatment for a certain time to precipitate an appropriate amount of leucite crystals, adding a pigment and a fluorescent material, further mixing and pulverizing.
- a ball mill, an Ishikawa crusher, a planetary mill and the like are preferably used.
- the sources of the respective elements constituting the porcelain are as follows. Such a thing is mentioned.
- Al (OH) as source Li CO, LiOH as Li source, Na CO, NaOH, K source as Na source
- Sb source as Sb source
- CeO as Ce source
- HBO B source. Sources are limited to these
- the first ceramic layer and the second ceramic layer include a leucite crystal.
- the toughness is further enhanced, and the thermal expansion coefficient can be easily adjusted.
- the leucite crystals are included in a proportion within the range of 265 (% by mass).
- FIG. 1 is a schematic diagram for explaining one stage of a method for manufacturing a crown according to an embodiment of the present invention, and is a diagram showing a cross section of a frame used for manufacturing a crown.
- FIG. 2 is a view for explaining a step following FIG. 1, showing a state where an underlayer (undercoat layer, that is, a first ceramic layer) is formed on the surface of the frame.
- underlayer undercoat layer, that is, a first ceramic layer
- FIG. 3 is a view for explaining a step following FIG. 2, showing a state in which a model layer is formed on the surface of an underlayer.
- FIG. 4 is a view for explaining a step subsequent to FIG. 3, showing a state in which the frame on which the base layer and the model layer are formed is attached to the pedestal.
- FIG. 5 is a view for explaining a step subsequent to FIG. 4, showing a state where a forging ring is installed on the pedestal and a dental investment material is poured into the inside thereof.
- FIG. 6 is a view for explaining a step subsequent to FIG. 5, and shows a state in which the model layer has been incinerated and removed to form a mold having a void portion in the model layer portion.
- FIG. 7 is a view for explaining a step following FIG. 6, showing a crown having a coat layer (embedded coat layer, that is, a second ceramic layer) formed on the surface of an underlayer.
- a coat layer embedded coat layer, that is, a second ceramic layer
- FIG. 8 is a process diagram illustrating a method for manufacturing a ceramic layer used for manufacturing a prosthesis according to another embodiment of the present invention.
- FIG. 9 is a schematic view for explaining one stage of a method of manufacturing a bridge according to still another embodiment of the present invention, and is a view showing a state of missing teeth.
- FIG. 10 is a diagram for explaining a stage following FIG. 9, and is a diagram showing a stage in which abutment teeth for mounting a bridge are formed.
- FIG. 11 is a view for explaining a step subsequent to FIG. 10, and is a view showing a frame created according to the prosthetic position.
- FIG. 12 is a diagram for explaining a stage following FIG. 11, showing a stage in which a first ceramic layer has been formed on the surface of the frame.
- FIG. 13 is a view for explaining a step following FIG. 12, showing a state in which a model layer is formed on an underlayer and is implanted in a former.
- FIG. 14 is a view for explaining a step following FIG. 13 and shows a state in which a coat layer is formed.
- FIG. 15 is a view showing a cross section of the pontic of the bridge in a cross section taken along the line XV-XV in FIG. 14.
- FIGS. 1 to 7 are schematic views illustrating a method for manufacturing a crown 38 which is an example of the dental prosthesis of one embodiment of the first invention and the second invention.
- the crown 38 is, for example, worn on an adult's upper anterior teeth. Note that the present invention can be applied to all other teeth.
- the in FIG. 1 a separately manufactured zirconia frame (single crown frame) 10 is prepared.
- the zirconia frame 10 is manufactured by a conventionally known means, for example, by molding a tooth mold with gypsum and embedding a dinoreconia.
- the first porcelain material was uniformly applied (filled) to the surface 12 of the zirconia frame 10 with a brush to a thickness of about O.l (mm).
- the first porcelain used here contained a ceramic powder having the composition shown in Table 1 below, and was prepared by mixing 100 parts by mass of a propylene glycol aqueous solution with respect to a total of 100 parts by mass of the ceramic powder. It is a slurry.
- the desired crown-shaped model layer 20 was formed on the surface 16 of the obtained base coat layer 14 using a dental wax (for example, “Blue Inlay Wax” manufactured by GC Company). Was formed.
- a dental wax for example, “Blue Inlay Wax” manufactured by GC Company.
- a pin 22 called a sprue line (for example, "Lady Casting Box R20" manufactured by GC) was attached to the sprue and transferred to the pedestal 26. Further, as shown in FIG. 5, a metal ring or rubber forging ring 28 is installed on the pedestal 26, and a room temperature hardening dental implant 30 (for example, a product of Degussa Dental Co., Ltd. And the model layer 20 was immersed in the entire frame 10. After the dental casting material 30 was hardened, the pin 22 and the pedestal 26 were removed, and the cured body composed of the casting material 30 with the frame 10 mounted inside was transferred into an electric furnace. Then, the inside of the furnace was heated to 850 (° C) and kept at that temperature for 1 hour. As a result, as shown in FIG. 6, the model layer 20 was incinerated and removed, and a type 32 in which the model layer portion became the void 18 was produced.
- a sprue line for example, "Lady Casting Box R20" manufactured by GC
- a glass composition (powder) crystallized by a heat treatment and having the composition shown in Table 1 was placed in a mold, pressed with a plunger, and then heated. Then, it was gradually cooled and preliminarily formed into a cylindrical shape.
- the ceramic ingot was attached to the ceramic holder 34 (the part with the pedestal) 34 of the mold 32. : EP500).
- the soft ingot i.e., the second porcelain
- a plunger not shown
- the second porcelain was pressed by a plunger (not shown) at a pressure of about 0.5 (MPa). ⁇ Mold Pressed in 32 directions.
- the second porcelain in a molten state was injected into the mold from the porcelain introduction passage 24 (that is, the portion where the pin 22 was), and was filled in the void 18.
- the viscosities of the first porcelain and the second porcelain at this time, that is, at the filling temperature (1050 (° C)) are as shown in Table 1.
- the viscosity was measured with a high temperature parallel plate viscosity measuring device (model: PPVM-1350) manufactured by Newman Tech.
- the obtained crown 38 was cut and the cross section was visually observed. As a result, no movement or deformation of the undercoat layer 14 was observed, and the entire frame 10 was covered while maintaining the thickness almost as designed.
- the crown 38 had an appearance close to that of a natural tooth.
- a ceramic powder having the composition shown in Table 2 was used as the second porcelain, and the viscosities at the time of filling were as shown in Table 2 in the same manner as in Example 1. Shaped crowns were produced. In Table 2, the viscosity is the value at the time of embedding. It is.
- composition of the second porcelain used in each example is shown: (% by mass)
- Examples 2, 3, 4 and 5 show that the viscosity of the first porcelain forming the base coat layer (9 ⁇ 10 6 (cP)) is lower than the viscosity of the second porcelain forming the embedded coat layer ( Since it is 1.5 times or more higher than that of (56 ⁇ 10 6 (cP)), no movement or deformation of the undercoat layer was recognized at all. Also, it has the same excellent appearance as natural teeth.
- a metal frame was used as the base.
- the composition of the metal frame is 78 (% by mass) Au, 7.1 (% by mass)? It is composed of 9.8 (% by mass) Pd, 2.4 (% by mass) Ag, and unavoidable impurities.
- a ceramic powder having the composition shown in Table 3 was used as the first porcelain, and the firing temperature of the undercoat layer was set to 980 (° C). Except for the above, a base coat layer was formed in the same manner as in Example 1.
- the ceramic powder having the composition shown in Table 3 was used in place of the ceramic powder having the composition shown in Table 1 as the second porcelain, and the application temperature was set to 960 (° C) and 20
- the embedding coat layer was formed in the same manner as in Example 1 except that the holding time for 15 minutes was changed to 15 minutes.
- the viscosity of the first porcelain and the second porcelain at the included temperature is as shown in Table 3.
- the obtained crown was cut and a cross section was visually observed.
- the viscosity of the first porcelain forming the base coat layer (1.5 ⁇ 10 7 (cP)) becomes lower than the viscosity of the second porcelain forming the embedding coat layer (IX 10 7 (cP)). Since it was 1.5 times higher than cP)), no movement or deformation of the undercoat layer was observed. Also, it had an excellent appearance similar to natural teeth.
- a ceramic powder having the composition shown in Table 4 was used as the second porcelain, and the teeth were prepared in the same manner as in Example 11 except that their viscosities at the time of filling were as shown in Table 4.
- the crown was manufactured.
- the viscosity is the value at the time of embedding.
- composition of the second porcelain used in each example is shown: (% by mass)
- composition of the ceramic powder of the first porcelain was changed to the composition shown in Table 5, except that the viscosity of the first porcelain at the time of filling at 1050 (° C) was the viscosity shown in Table 5.
- composition of the ceramic powder of the first porcelain was changed to the composition shown in Table 6, except that the viscosity of the first porcelain at the time of filling at 960 (° C) was the viscosity shown in Table 6.
- the crown 38 to be manufactured is the same as that shown in FIGS. 1 to 7 described above, and therefore the differences will be mainly described with reference to FIGS. 1 to 7. .
- a first porcelain shown in Table 7 below was provided, and a brush (0.2 mm) was applied to the surface 12 of the ginoreconia frame 10 with a brush. It was applied (filled) evenly with a thickness of about one.
- the first porcelain contains a ceramic powder having the composition shown in Table 7 below, and a slurry prepared by mixing 100 (parts by weight) of a propylene glycol aqueous solution with respect to a total of 100 (parts by weight) of the ceramic powder. It is. After assembling, this was fired at a temperature of about 1050 (° C.) to form a first ceramic layer (that is, a base coat layer) 14 on the entire surface 12 of the frame 10 as shown in FIG.
- the first porcelain is, for example, synthesized according to the manufacturing process shown in FIG. That is, in the weighing step R1, for example, a compound that produces an oxide at a glass melting temperature in the range of 1000 to 1500 (° C.) is weighed, and in the mixing step R2, it is mixed using a ball minole or an Ishikawa crusher. I do. Next, in the heating and melting step R3, for example, after heating and melting in the atmosphere (for example, 1000 (° C.) or more), this is cooled and collected in the cooling and collecting step R4. Next, in a pulverizing step R5, this is further pulverized using a ball mill or a planetary mill.
- the pulverized raw material is subjected to a heat treatment at a temperature within a range of, for example, 800 to 1100 (° C.) for a period of about 30 to 60 minutes.
- a heat treatment at a temperature within a range of, for example, 800 to 1100 (° C.) for a period of about 30 to 60 minutes.
- the thermal expansion coefficient can be adjusted by controlling the leucite crystals.
- the pigment / fluorescent material addition / mixing step R7 the pigment and the fluorescent material are mixed using a ball minole or an Ishikawa-type crusher, and the first porcelain is obtained by crushing in the crushing step R8.
- the raw material used here is an appropriate one selected from various sources serving as a supply source of each element as described above.
- the porcelain contains a fluorescent material and a pigment in addition to the above main components.
- a model layer 20 was formed on the surface 16 of the obtained first ceramic layer 14, and in the same manner as in the above-mentioned Example 1 and the like, a square pattern 32 was formed according to FIGS. It was created.
- the heating temperature for incineration and removal of the model layer 20 is, for example, 800 (° C).
- a glass powder having the composition shown in Table 7 was prepared as the second porcelain, a glass composition (powder) crystallized in the same manner as the first porcelain was synthesized, and further a mold was prepared.
- a pressing device, etc. form a cylinder with a diameter of, for example, 10 (mm) and a height of about 10 (mm), bake it at a temperature of, for example, about 1050 (° C), and gradually cool it.
- a cylindrical glass ingot was obtained.
- the glass ingot is mounted on the ceramic holder 34 of the mold 32 and heated in a high-temperature press furnace to soften the ingot in the same manner as in Example 1 or the like. And filled in the void portion 18.
- the viscosity of the second porcelain material, that is, the second ceramic layer (that is, the coat layer) 36 was about 1 ⁇ 10 7 (cP).
- the viscosity of the first ceramic layer 14 at the same temperature is about 5 ⁇ 10 6 (cP), which is sufficiently larger than this.
- the second porcelain was poured and cooled, and after completion of cooling, the mold 32 was broken and the crown (crown) 38 was taken out.
- the crown 38 had an appearance close to that of a natural tooth.
- the third ceramic layer covering part or all of the surface of the second ceramic layer 36 is provided with a more transparent porcelain material, so that the appearance can be made closer to natural teeth. These are not required, but are omitted in Figure 7.
- the mass ratio of SiO was 67.5 (%), A10 was 15.9 (%), and Li0 was 0.1 (%), Na ⁇ is 4.8 (%), K 0 is
- the first ceramic layer 14 formed first on the lower side has a higher viscosity at the same temperature than the second ceramic layer 36 formed thereon, the first ceramic layer 14 is formed when the second ceramic layer 36 is fixedly formed. First, the first ceramic layer 14 formed earlier is suppressed from being softened and flown or deformed.
- a second porcelain material was prepared in a powdered state, laid on the first ceramic layer 14 in the same manner as the first porcelain material, and for example, 930 (° C The firing process was performed at a temperature of about). Even with such a manufacturing method, a similar crown 38 was obtained, and no crack was present on the surface thereof, and it was confirmed that a desired crown shape was obtained.
- the dental prosthesis manufactured by the manufacturing method of the third invention uses a high-strength ginoreconia frame 10. Therefore, it is suitably applied to a bridge including a molar.
- FIG. 9 to FIG. 15 are views for explaining a method of manufacturing a three-bridge 68 for prosthesis for one missing tooth of an adult molar.
- FIG. 9 shows the main part of the upper jaw 40 in which one tooth is missing, and the missing tooth 42 is shown by a dashed line in the center.
- FIG. 10 shows a stage in which the teeth 44, 46 on both sides of the missing tooth 42 are cut to form the abutment teeth 48, 50.
- a frame (three-bridge frame) 52 having an inner surface shape slightly larger than the outer shape of the formed abutment teeth 48, 50 is made of zirconia.
- FIG. 11 shows a cross section of the manufactured frame 52.
- the frame 52 is manufactured by a CAD / CAM method or the like in which the shape of the upper jaw 40 on which the abutment teeth 48 and 50 are formed is measured, and a ceramic block is cut out.
- the frame 52 is formed by connecting the core elements 54, 56 corresponding to the abutment teeth 48, 50 (i.e., the frame of the so-called coving portion) and the core element 58 corresponding to the missing tooth 42 (i.e., the so-called pontic frame). Things.
- the first ceramic layer 60 is laid on the surface of the frame 52 in the same manner as in the case of the single crown. As shown in the figure, the first ceramic layer 60 covers the outside of the core elements 54 and 56, and covers the entire surface of the core element 58. It is provided to cover.
- a model layer 62 is formed on the surface in the shape of the teeth 44, 46 and the missing teeth 42 by using wax or the like, and is planted on the former 64. The method of forming the model layer 62 and the method of planting it on the former 64 are the same as in the case of a single crown. Similar to the case shown in FIG.
- FIG. 15 shows a cross section (XV—XV cross section in FIG. 14) of a portion (pontic) 70 of the manufactured bridge 68 corresponding to the missing tooth located at the center.
- the bridge 68 manufactured as described above has the desired shape and thickness dimensions for both the first ceramic layer 60 and the second ceramic layer 66. None was seen. In addition, it had an appearance close to that of a natural tooth and had sufficient strength and toughness as a molar. Even in such a bridge 68, a third ceramic layer having higher transparency is provided as necessary on a part or the entire surface of the second ceramic layer 66. It is omitted in FIG. 14 and FIG.
- the technical elements described in the present specification exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Further, the technology exemplified in the present specification achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Dental Prosthetics (AREA)
- Dental Preparations (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2004800203250A CN1822796B (zh) | 2003-07-17 | 2004-07-13 | 齿科用修复体的制造方法和制造齿科用修复体的套材 |
EP04747434.1A EP1654998B1 (en) | 2003-07-17 | 2004-07-13 | Process for producing a dental prosthesis and kit for use therein |
US10/563,987 US20060261503A1 (en) | 2003-07-17 | 2004-07-13 | Process for producing dental prosthesis and kit for use for therein |
BRPI0412344-1A BRPI0412344A (pt) | 2003-07-17 | 2004-07-13 | método de fabricação de prótese dentária, kit e conjunto de porcelana dentária |
KR1020067001117A KR100934595B1 (ko) | 2003-07-17 | 2004-07-13 | 치과용 보철물의 제조 방법 및 이에 사용하기 위한 키트 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003198682A JP4169653B2 (ja) | 2003-07-17 | 2003-07-17 | 歯科用補綴物の製造方法及びそれに用いるキット |
JP2003-198682 | 2003-07-17 | ||
JP2003-434350 | 2003-12-26 | ||
JP2003434350A JP4373202B2 (ja) | 2003-12-26 | 2003-12-26 | 歯科用補綴物の製造方法および歯科用陶材セット |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005007009A1 true WO2005007009A1 (ja) | 2005-01-27 |
Family
ID=34082320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/009968 WO2005007009A1 (ja) | 2003-07-17 | 2004-07-13 | 歯科用補綴物の製造方法およびそれに用いるキット |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060261503A1 (ja) |
EP (2) | EP1654998B1 (ja) |
KR (1) | KR100934595B1 (ja) |
BR (1) | BRPI0412344A (ja) |
WO (1) | WO2005007009A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006100371A1 (fr) * | 2005-03-23 | 2006-09-28 | Michel Seguier | Dents prothetiques a dentine reconstituee, procede d’application d’une telle dentine et ensemble de compositions pour sa mise en oeuvre |
US20100015572A1 (en) * | 2006-07-19 | 2010-01-21 | BEGO Bremer Goldschlagerei Wilh Herbst GmbH & Co. | Set of Elements for Producing a Dental Prosthesis, System for Producing a Dental Prosthesis or a Set of Elements, and Corresponding Production Methods |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE464018T1 (de) * | 2007-11-28 | 2010-04-15 | Ivoclar Vivadent Ag | Verfahren und system zur herstellung von dentalen restaurationen aus keramik |
US10260811B2 (en) * | 2008-03-05 | 2019-04-16 | Ivoclar Vivadent Ag | Dental furnace |
JP5072657B2 (ja) * | 2008-03-05 | 2012-11-14 | 株式会社松風 | アルミノシリケートガラスおよびセラミックス系歯冠陶材用の色調調整組成物 |
GB0822751D0 (en) * | 2008-12-15 | 2009-01-21 | 3M Innovative Properties Co | Method of making a dental restoration, and system for design and manufacturing a dental restoration |
JP5501642B2 (ja) * | 2009-03-23 | 2014-05-28 | 株式会社ノリタケカンパニーリミテド | 蛍光性ジルコニア材料 |
EP2529694B1 (de) * | 2011-05-31 | 2017-11-15 | Ivoclar Vivadent AG | Verfahren zur generativen Herstellung von Keramikformkörpern durch 3D-Inkjet-Drucken |
KR101407938B1 (ko) | 2012-04-18 | 2014-06-17 | 장영진 | 치아용 크라운 제조방법 |
US20150250568A1 (en) * | 2012-10-02 | 2015-09-10 | Crownceram | Mould for dental restoration |
KR101248630B1 (ko) * | 2012-11-13 | 2013-04-02 | 노리아키 오카모토 | 최적의 주조타이밍 판단이 용이한 치과 보철물 주조 장치 및 그 주조 방법 |
KR101512176B1 (ko) * | 2013-07-24 | 2015-04-15 | 주식회사 에덴 | 리튬 디실리케이트를 이용한 유치관 제조 방법 및 이 제조방법을 이용한 유치관 |
CN111295172A (zh) * | 2017-11-07 | 2020-06-16 | 可乐丽则武齿科株式会社 | 韧性提高的牙科用产品 |
DE102018119078A1 (de) * | 2018-08-06 | 2020-02-06 | Redios-Tec Gmbh | Verfahren zur Herstellung eines Dentalbauteils |
DE102018119079A1 (de) * | 2018-08-06 | 2020-02-06 | Redios-Tec Gmbh | Verfahren zur Herstellung eines Dentalbauteils |
CN110040963A (zh) * | 2019-03-29 | 2019-07-23 | 合肥卓越义齿制作有限公司 | 一种贵金属烤瓷牙用象牙白釉料及其使用方法 |
KR102231349B1 (ko) * | 2019-06-10 | 2021-03-23 | 송두빈 | 6 이상의 반투명도를 갖는 지르코니아 코어-세라믹 치과용 보철물 및 그 제조방법 |
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JPS5720262A (en) * | 1980-07-09 | 1982-02-02 | Ohara Kk | China tooth and its manufacture |
JPH04126143A (ja) * | 1990-09-17 | 1992-04-27 | Nippon Electric Glass Co Ltd | 人工歯冠の製造方法 |
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FR1605273A (ja) * | 1967-04-25 | 1974-01-25 | ||
US3934348A (en) * | 1975-01-02 | 1976-01-27 | Bora Janjic | Method of forming a porcelain crown |
US4307044A (en) * | 1978-05-04 | 1981-12-22 | Perez Richard D | Method of making a casting |
US4585417A (en) * | 1979-12-14 | 1986-04-29 | Coors Porcelain Company | Dental appliance and method of manufacture |
AU683050B2 (en) * | 1993-06-24 | 1997-10-30 | Dentsply Gmbh | Dental prosthesis |
US5653791A (en) | 1996-03-12 | 1997-08-05 | Jeneric/Pentron, Incorporated | Two-phase dental forcelain composition |
DE19852516A1 (de) * | 1998-11-13 | 2000-05-25 | Degussa | Keramische Dentalrestauration |
US6428614B1 (en) * | 1999-07-02 | 2002-08-06 | Jeneric/Pentron, Inc. | Dental porcelains |
EP1132056B1 (en) * | 1999-09-20 | 2007-03-21 | Tokuyama Corporation | Method of producing ceramic crowns and production kit used therefor |
-
2004
- 2004-07-13 EP EP04747434.1A patent/EP1654998B1/en not_active Expired - Lifetime
- 2004-07-13 EP EP11166741.6A patent/EP2377488B1/en not_active Expired - Lifetime
- 2004-07-13 KR KR1020067001117A patent/KR100934595B1/ko active IP Right Grant
- 2004-07-13 BR BRPI0412344-1A patent/BRPI0412344A/pt not_active Application Discontinuation
- 2004-07-13 US US10/563,987 patent/US20060261503A1/en not_active Abandoned
- 2004-07-13 WO PCT/JP2004/009968 patent/WO2005007009A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5720262A (en) * | 1980-07-09 | 1982-02-02 | Ohara Kk | China tooth and its manufacture |
JPH04126143A (ja) * | 1990-09-17 | 1992-04-27 | Nippon Electric Glass Co Ltd | 人工歯冠の製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006100371A1 (fr) * | 2005-03-23 | 2006-09-28 | Michel Seguier | Dents prothetiques a dentine reconstituee, procede d’application d’une telle dentine et ensemble de compositions pour sa mise en oeuvre |
US20100015572A1 (en) * | 2006-07-19 | 2010-01-21 | BEGO Bremer Goldschlagerei Wilh Herbst GmbH & Co. | Set of Elements for Producing a Dental Prosthesis, System for Producing a Dental Prosthesis or a Set of Elements, and Corresponding Production Methods |
US8636512B2 (en) * | 2006-07-19 | 2014-01-28 | Bego Bremer Goldschlagerei Wilh. Herbst Gmbh & Co. Kg | Set of elements for producing a dental prosthesis, system for producing a dental prosthesis or a set of elements, and corresponding production methods |
Also Published As
Publication number | Publication date |
---|---|
EP1654998B1 (en) | 2014-05-07 |
KR100934595B1 (ko) | 2009-12-31 |
BRPI0412344A (pt) | 2006-09-05 |
EP1654998A4 (en) | 2007-07-04 |
EP2377488B1 (en) | 2014-09-10 |
US20060261503A1 (en) | 2006-11-23 |
KR20060056948A (ko) | 2006-05-25 |
EP2377488A1 (en) | 2011-10-19 |
EP1654998A1 (en) | 2006-05-10 |
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