JPS6032706A - Dental ceramic sheet material and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet-shaped dental porcelain material for forming a fired porcelain crown and a method for manufacturing the same.

Traditionally, the manufacturing method for baked porcelain crowns has been to first mold and cast the crown in order to secure it to the abutment tooth. It gives a sharp finish and also makes the lip surface even. An orovaginal test is performed on such a crown using a mound of tooth-colored wax, and after completion of the test, anhydrite is injected to create a duplicate model. On the other hand, the wax on the crown is completely removed by ultrasonic cleaning using high-pressure steam and organic solvents such as chloroform, and then cleaned with hydrogen fluoride and fired in the atmosphere to form an oxide film on the surface. I'll keep it. After that, the opaque powder is kneaded with a special liquid, but in this case, it is kneaded to a soft cream-like consistency, taking care not to introduce air bubbles. Next, apply a thin layer of special liquid to the metal frame that forms the crown with a brush to moisten the surface.

Under this condition, the cream-like paint-on-opaque made by mixing the above mixture is applied, but it must be applied thinly and evenly to the metal frame, and it must be applied to the metal frame other than the baked surfaces such as the inside of the crown. It is necessary to carefully check that the paint-on opaque powder does not protrude. After the metal frame is coated with paint-on-opaque powder and is in good condition, it is fired according to the prescribed firing schedule. If necessary, paint-on-opaque powder is applied again and fired, but at this stage the dull luster is removed. A smooth surface is obtained. After firing the opaque color, select the most suitable color to apply dentin powder, enamel powder, and translucent powder in sequence according to the shade chart, and apply the selected porcelain powder with a special mixing solution for porcelain or Mix with distilled water, taking care not to introduce air bubbles. After mixing, the porcelain slurry may be vibrated with a mallet or vibrator to remove air bubbles in the porcelain slurry. After moistening the surface of the opaque layer with distilled water, etc., we begin to build up the dentin-colored porcelain.In this case, we take care to prevent the porcelain mud from getting into the porcelain mud as much as possible, and it rises all at once. The porcelain is built up while condensing by applying vibrations to the model. Once the dentin-colored porcelain has been built up, the appearance of the crown is lightly adjusted using a knife or the like. In the same way, after applying translucent powder to the enamel-colored porcelain, the growth groove on the labial surface, and the lingual incisal area, perform the condensation process to check for any protruding porcelain or porcelain that has entered the upper part. , and fire according to the firing schedule. After the crown thus obtained undergoes many other modification steps such as shaping and surface polishing, a metal-baked porcelain crown using porcelain is completed and attached to the patient's abutment tooth.

As mentioned above, in the conventional process of creating porcelain dental crowns, porcelain powder selected to match the color of the patient's dentition is mixed with distilled water, etc., and then built up on the opaque layer surface. To build up the porcelain, apply kneaded porcelain powder to the brush tip and condense it while applying vibrations with a mallet to adhere and build up the porcelain.

However, this kind of porcelain building work not only requires mixing the powder, but it is also difficult to build up the opaque layer thinly and evenly on the surface by using a brush to apply the mixed powder slurry. This method requires considerable skill and takes a considerable amount of time even for experienced workers, and it is difficult to obtain a porcelain layer with a uniform thickness and surface condition.

The present invention was developed particularly in view of the drawbacks of the method for forming a porcelain layer as described above, and will be explained in detail below using examples.

1 and 2 are schematic diagrams for explaining the manufacturing method of the dental sheet-shaped porcelain of the present invention. FIG. A slurry 2 made by kneading wood powder with water or an organic solvent is temporarily stored in a slurry sump 3, and a rotating roller 4 is disposed adjacent to the slurry sump 3. . Further, 5 is a sheet winding roll in which an organic sheet S such as Japanese paper or synthetic resin is wound as a base sheet.

5- With the device as described above, the organic sheet S is now guided by the roller 4 and sent out in the direction shown by the arrow in the figure, so that the slurry 2 in the slurry reservoir 3 is attached to one side of the organic sheet S. A laminated sheet is obtained, which may be passed through a vibrating or pressing roll 7 as required.

The thickness of the porcelain C adhered to the organic sheet S to form the sheet-like porcelain T can be controlled by the density of the slurry 2, that is, the viscosity, the feed speed of the organic sheet S, etc. I can do it.

As another method for producing a sheet-like porcelain material T in which a porcelain material C is adhered and laminated on such an organic sheet S, as shown in a schematic diagram in FIG. A sheet-like porcelain material T made by laminating porcelain materials C to a predetermined thickness can be manufactured by spraying a suitably concentrated solution of dissolved powder from the nozzle N and drying it. In this scattering method as well, organic sheets S can be continuously produced by moving them. By adjusting the moving speed, the thickness of the porcelain C adhered to and laminated on the organic sheet S can be controlled.

The thickness of the porcelain C in the sheet-like porcelain T produced by the above-mentioned manufacturing method varies depending on the surface condition of the crown to which it is attached.
It also has a thickness suitable for pasting work, so 0.
O1~1. It is sufficient to prepare sheet-like porcelain T having different thicknesses within the OB range. In addition, in this case, porcelain C
In addition to the thickness of the organic sheet S, the thickness of the organic sheet S also affects the difficulty of attaching it to the crown surface, but as a result of repeated trial production tests, organic sheets 1-3 were 0.5% thicker than Japanese paper.
fi, 0.5m even for synthetic resin sheets such as polyethylene
It has been found that a thickness of about 1.0 m is optimal.

Next, a method for manufacturing a dental crown using the sheet-shaped porcelain T manufactured by the above-mentioned manufacturing method will be described in detail.

As shown in Fig. 3, in order to attach the sheet-shaped porcelain T, which has been cut in advance to an area sufficient to cover almost the entire outer periphery of the dental crown material, to the dental crown material, Porcelain C of Porcelain T
Press the surface of the tooth crown material against the surface of the tooth crown material, press it uniformly with a soft knife or your fingertips, etc., and align it to the surface shape of the tooth crown material, then apply the organic seam 1-3. It is assumed that only porcelain C is stuck to the peeled tooth crown material. After that, any parts that protrude from the periphery are removed using a knife, scissors, brush, or spatula, and the periphery is shaped to make it smooth. After that, the temperature of the atmosphere at which the porcelain C was fired was 1,500~1.
By sintering at 700° C., it can be sintered and integrated into the crown material as shown in FIG.

After porcelain C as an opaque layer is attached to the crown material, dentin powder,
Enamel powder and translucent powder are sequentially applied and fired to complete the crown, which is attached to the patient's abutment tooth.

As an example of application of the sheet-shaped porcelain according to the present invention, platinum foil is pressed against the tooth base of a model, the surface is cleaned, and then the porcelain according to the present invention is attached to the entire circumferential surface and fired. Needless to say, it can also be used to produce alumina jacket crowns, in which dentin and enamel layers are built up and fired, and then the shape is corrected and the polishing is fired.

In addition, in the above-mentioned example, an example was explained in which only the opaque layer was constituted by the sheet-like porcelain of the present invention, but the invention is not limited to this.
The purpose is to form a single dentin layer and an enamel layer, to integrally laminate two layers of dentin and enamel, or to integrally laminate three layers of opaque layer, dentin layer and enamel layer. It may also be made of sheet-like porcelain.

As described above, the sheet-shaped porcelain according to the present invention is made by laminating porcelain of uniform thickness on one side of an organic sheet, and such sheet-shaped porcelain can be produced by the two manufacturing methods described above. It is possible to easily produce porcelain with a uniform thickness in large quantities, and the sheet-like porcelain according to the present invention can be pressed and adhered to the surface of a dental crown material and sintered to achieve a uniform thickness. It has many excellent functions and effects, such as being able to form a durable and beautiful opaque layer on the surface of the top material in a short period of time without requiring any particular skill.

[Brief explanation of drawings]

Figures 1 and 2 are schematic diagrams of an apparatus for explaining the manufacturing method of the dental sheet porcelain according to the present invention, and Figure 3 illustrates the process of attaching the dental sheet porcelain to the crown material. FIG. 4 is a central sectional view of a tooth crown manufactured by the manufacturing method of the present invention. L: Tank 2: Mud 4: Roller C: Porcelain S
: Organic sheet T: Sheet-like porcelain N: Nozzle D: Dental crown material E: Enamel layer Applicant Kyocera Corporation Representative Kazuo Ina Mori 10-1 ---- -1 Figure 2 Figure 4 E+-1-.

Claims (3)

[Claims] (1) Made of organic material such as Japanese paper or synthetic resin, with a thickness of 1
A dental sheet-like porcelain material, characterized in that the porcelain material is adhered to a base sheet having a size of n or less. (2) The process of kneading powdered porcelain and hot material and molding it into a sheet, and pressing the sheet-shaped porcelain created by this molding process onto a base sheet made of organic material such as Japanese paper or synthetic resin. A method for manufacturing dental sheet-like porcelain, characterized by comprising a step of pasting. (3) It is characterized by the step of kneading powdered porcelain into a wet material to make a mud, and the step of spraying and adhering the mud plaster created by this step onto a base sheet such as Japanese paper or synthetic resin. Manufacturing method for dental sheet porcelain.