JPH0622987A - Manufacture of porcelain tooth - Google Patents

Abstract

PURPOSE:To strongly attach a porcelain material to a base member through baking so that no oxidized substance layer is formed between a TI group tooth base member and the porcelain member. CONSTITUTION:When a porcelain material is built on a TI group tooth base member 2, a coaxial inert gas nozzle 5 is installed on the periphery of a burner nozzle 4, and the porcelain member 3 is baked in the state enclosed by inert gas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing porcelain teeth.

[0002]

2. Description of the Related Art A metal-baked porcelain crown can be said to be a composite restoration of metal and porcelain. The advantage of porcelain is that it has a color tone, gloss and transparency similar to natural teeth, is hard and has a strong compressive force. However, it has the drawback that it is cystic and easily chipped. Metal porcelain is obtained by reinforcing the defects of this porcelain with a metal having high toughness.
Therefore, in order to fully exert its reinforcement effect,
The metal and porcelain must be tightly and firmly bonded. On the other hand, Ti or a Ti alloy as a dental metal material has excellent corrosion resistance and biocompatibility, and is therefore used as a dental material. However, this Ti material oxidizes violently at high temperature and causes a strong chemical reaction, so when building porcelain, oxygen is adsorbed from the surroundings at the bond boundaries to form an oxide layer, and the structure of this oxide layer is fragile. Therefore, there is a drawback that the baking of the metal base material and the porcelain material cannot be made firm.

[0003]

SUMMARY OF THE INVENTION In view of the above points, the present invention strongly prevents the base material and the porcelain from forming an oxide layer between the Ti-based tooth base material and the porcelain. It is intended to burn.

[0004]

When constructing a porcelain material on a Ti-based tooth base material, a burner is fired while the base material is wrapped with inner gas. Further, it is characterized in that the surface of the base material is coated with AuPt and the porcelain is constructed later. Further, it is characterized in that the surface of the base material is carbonized or nitrided and then porcelain is constructed.

[0005]

In the present invention, the porcelain is burned by the burner with the base material wrapped with inner gas as described above.
Porcelain is baked in a state where it is shielded from air by an inert gas such as argon, and it can be baked without interposing an oxide layer having a brittle solid structure of oxide between the base metal and the porcelain. As a result, it is possible to obtain a composite restoration in which the bonding strength is increased and the advantages of the base metal and the porcelain are incorporated.
Also, by interposing AuPt on the surface of the base material or by performing carbonization or nitriding treatment to form TiC or TiN, it is possible to avoid the interposition of an oxide layer and increase the bonding strength of the porcelain. .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment of the drawings. FIG. 1 shows an embodiment of ceramic teeth, 1 is a natural tooth, or an artificial abutment tooth in the absence of a natural tooth, which utilizes the head of an implant implanted in the jawbone. 2 is T that fits closely to the abutment tooth
i, a crown base material composed of a Ti-based alloy such as TiNi,
A porcelain material 3 of an oxide aggregate such as SiO ₂ , CaO, k ₂ O and NaO is built on this. This means that the vitreous strong layer 3 can be formed by repeating the work of applying the porcelain on the base of the base material with a brush and then firing it many times.

FIG. 2 shows an embodiment of a burner for burning porcelain 3, in which a coaxial nozzle 5 for supplying inner gas is provided around the burner nozzle 4. Supply port 5 of this coaxial nozzle 5
By supplying an inert gas such as argon under pressure to a, it is possible to form a jet curtain 51 of argon gas so as to surround the flame 41 jetted from the burner nozzle 4. When the substrate 2 coated with the porcelain 3 is applied to the flame 41 ejected from the burner 4, the substrate 2 is wrapped in a curtain of argon gas ejected from the coaxial nozzle 5, and is shielded from the outside air, The porcelain 3 can be directly baked on the base material Ti by firing without forming an oxide layer on the Ti surface of the base material. Porcelain firing temperature is 750
The temperature is raised from 0 ° to 1100 ° C., baked, and processed by stacking many times. Ti baked in this way
The base material 2 and the porcelain material 3 can be bonded extremely tightly and firmly, and in addition to the advantages of the porcelain material material 3 such as color tone, gloss, transparency and high hardness, the toughness of the Ti base material 2 provides sufficient toughness. A good reinforced crown can be made.

FIG. 4 shows the Ti substrate 2 prior to baking the porcelain 3.
In the example of the vapor deposition apparatus for performing the AuPt-based surface treatment on
Is an airtight processing container, and 7 is a lid provided on the bottom of the container, which can be opened and closed by closely fitting. Reference numeral 8 denotes a vacuum pump for evacuating the interior of the container 6, reference numeral 9 denotes an electrode of a covering material provided in the container 6, a discharge electrode 10 is provided facing the electrode, and a discharge power source 11 is connected to the electrode.
Reference numeral 12 is a fixed base of the Ti base material 2 provided on the lid 7, to which a negative bias power source 13 is connected. Pump 8 in the airtight processing container 6
The gas is evacuated to about 10 ⁻² to 10 ⁻⁴ Torr by this, and discharge is performed by the power supply 11 between the electrodes 9 and 10 at this atmospheric pressure. 85Au-0.5Ag for coating material electrode 9
-4pt-8Pa alloy (melting point 1200 ° C) or 72Au
-2.8Ag-10.7Pt-2.6Cu alloy (melting point 1
250 ° C.) or the like is used. The discharge current is, for example, 60 V / 50
By using A, fine metal vapor and ions are generated from the coating material electrode 9 by this discharge. The generated vapor and ions are accelerated in the electric field toward the Ti base material 2 to which a bias of a negative potential, for example, about 700 to 500 V is applied, and are deposited on the Ti base material 2 while being ionized. As a result, the AuPt-based coating film of the electrode 9 can be formed on the surface of the Ti base material 2.

In addition, TiC or TiN may be formed on the surface of the Ti base material 2.
In order to coat C ₂ H ₂ , N ₂ from the other gas supply port 14 while evacuating the inside of the processing container 6 by the pump 8.
Of reactive gas such as T, generated from the coating material electrode 9
A chemical reaction with i-ions is performed, and the reaction product is used as the base material 2
Evaporate on the surface. The melting point of the TiC vapor deposition film is 3200 ° C., T
The iN is 2950 ° C. and has high heat resistance, and porcelain porcelain is fusion-bonded thereon sufficiently stably and satisfactorily. still,
For the vapor deposition process, any CVD or PVD apparatus other than the above-mentioned embodiment can be used, and wire fusing discharge, laser irradiation, etc. can be used for generating metal vapor. Further, although the above-mentioned embodiment has explained the crown, it can be applied to any artificial teeth such as teeth and dentures.

[0010]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, when porcelain is constructed on the Ti-based tooth base material, the porcelain applied to the base material is burned by the burner while being wrapped with inner gas. Therefore, the porcelain is baked in a state where it is shielded from the air by an inert gas such as argon, and the oxide is not tightly interposed between the base metal and the porcelain, especially the oxide layer having a fragile structure. It is possible to obtain a composite restoration which can be strongly baked and has a high bond strength and which has the advantages of both the base metal and the porcelain. That is, in addition to the advantages of porcelain such as color tone, luster, transparency and high hardness, it is possible to produce a tooth in which the toughness of the Ti base material is sufficiently reinforced. or,
The surface of the base material is treated with AuPt, or carbonized or nitrided to form TiC or TiN, and the porcelain is raised on the TiC or TiN to prevent the oxide layer from intervening. Can increase the bonding strength.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of ceramic teeth.

FIG. 2 is an example of a burner used in the porcelain firing process of the present invention.

FIG. 3 is a diagram showing an embodiment of an apparatus for vapor deposition processing of the present invention.

[Explanation of symbols]

 1 Abutment 2 Ti-based substrate 3 Porcelain 4 Burner nozzle 5 Inner gas nozzle

Claims (3)

[Claims] 1. A method for manufacturing a porcelain tooth, characterized in that, when a porcelain material is built on a Ti-based tooth base material, the base material is wrapped with inner gas and burner-fired. 2. A method of manufacturing a porcelain tooth, characterized in that when a porcelain material is built on a Ti-based tooth base material, an AuPt-based coating treatment is performed on the surface of the base material, and then the porcelain material is built up. . 3. A method of manufacturing a porcelain tooth, characterized in that when porcelain is built on a Ti-based tooth base material, the surface of the base material is carbonized or nitrided and then the porcelain is built.