JP3419485B2 - Colored resin powder for resin front crown maintenance device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an object to easily identify a wax and a resin powder maintaining device on a wax pattern and to easily determine a particle diameter of the resin powder maintaining device. The present invention relates to a colored resin powder for a resin front-crown maintaining device.

[0002]

2. Description of the Related Art Usually, when a cariousness or other defect is large and recovery is not possible with a partially covered crown, in the case of fractured teeth or deformed teeth due to trauma, etc. Many treatment methods such as wearing a cast crown are adopted. However, there is a problem in aesthetics with a fully cast crown, and a method of prepending the lips and buccal surface of the fully cast crown with a crown-colored material is used for the front tooth portion that requires aesthetic consideration. Depending on the type of material to be prepended, there are porcelain crowns, porcelain welded crowns, and resin crowns. Among them, the resin front crown is a cast crown (metal frame) on which resin or hard resin is mounted, and it is easy and economical to manufacture. It is frequently applied clinically. When making a resin veneer crown, the resin or hard resin is not damaged and the resin is thick enough to reproduce the color tone. The resin is firmly bonded to the metal part (metal frame). It is very important to.

There are roughly three methods for connecting a resin and a hard resin to a metal frame. How to attach mechanical retention to the metal frame surface. A method of chemically bonding metal and resin. A method that uses both of them together. Among them, the mechanical maintenance method can be easily carried out because the technical operation is simple, there are few failures, and no special equipment or materials are required. In addition, since the maintenance power is stable over time, it is widely used clinically. In practice, a dedicated adhesive is thinly applied on the wax pattern with a brush, and the resin powder is evenly sprinkled evenly to produce a metal frame by the lost wax method. At this time, the resin powder replaces the metal and an undercut is made on the metal frame. By laying a resin or a hard resin on this, the resin or the hard resin enters the undercut, and the strength and elasticity of the resin or the hard resin creates a binding force with the metal frame.

The chemical bonding method is often combined with a mechanical maintenance method in order to increase the reliability of the maintenance. There are holes, loops, bars, graters, beads, powder, etc. as mechanical maintenance devices, but at present, beads and powder using resin powder are most often used. This method has the best maintainability and edge sealing property, and has the advantage that it is easily attached to the wax pattern and does not take a large thickness.

[0005]

However, the resin powders that are currently widespread are either white semitransparent or colorless and transparent, or the colorless and transparent beads are made white by scratching the surface of the beads. , Has the following problems. Since the transparency of the resin powder is high when the adhesive is applied to the wax pattern and the resin powder is sprinkled and adhered, it is difficult to distinguish the wax from the wax particularly finer, and it is possible to evenly adhere it on the wax pattern. It is also difficult to confirm whether or not they adhere uniformly. This is a great obstacle to the production of a resin veneer crown that is excellent in maintaining power and edge sealing ability by using resin powder. Currently, there are various particle diameters of products using resin powder, but since they have the same color, it is difficult to determine the particle diameter to be used at a glance.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor has solved the problem by developing a flammable spherical or amorphous resin powder colored with a dye. . Hereinafter, the colored resin powder for a resin front crown retaining device of the present invention will be described in detail. Colorants for resins are roughly divided into two types, dyes and pigments. To use a pigment to color a resin, the so-called deposition method is used to put the resin in a plasticized state and then add the pigment. A method of uniformly dispersing by kneading or the like is adopted. However, this method takes a very long time for coloring and is not practical in the present invention. It is desirable to use a dye that can be easily colored and is highly practical. The resin coloring dyes include water-soluble dyes, oil-soluble dyes, and organic solvent-soluble dyes, depending on the type of solvent. Of these, water-soluble dyes, which are most convenient for coloring, are preferable.

Examples of water-soluble dyes include azo dyes, anthraquinone dyes, triphenylmethane dyes, polymethine dyes, indigoid dyes, quinoneimine dyes, but not limited to these. When coloring, one kind or a mixture of several kinds may be used. The names of these water-soluble dyes are classified according to their molecular structures, and there are many types of each. Next, in order to color the spherical or amorphous resin powder with the water-soluble dye, the resin powder is immersed in water in which the water-soluble dye is dissolved. Examples of the material of the spherical or amorphous resin powder usable in the present invention include polyethylene, polypropylene, polystyrene, styrene-acrylonitrile (AS resin), and stin-butadiene-acrylonitrile (ABS).
Resin), polyvinyl chloride, polymethylmethacrylate, polyamide, polyester, polycarbonate and the like, but not limited to these. Among these things, it is desirable for many years as a maintenance device for resin front crowns,
It is a proven polymethylmethacrylate.

The particle size of the resin powder is 30 to
800 μm is good. If it is less than 30 μm, the resin powder will be buried in the adhesive, and the undercut will be too small because it is so fine that the mechanical maintenance force required to bond the resin and the hard resin to the metal frame cannot be obtained. Also
If it is 800 μm or more, the opaque layer becomes too thick, and it cannot be used in terms of color reproducibility. Then, it is preferable to select the particle size within the range of 30 to 800 μm according to the site to be used and the case. The amount of the water-soluble dye is preferably 0.001 to 10 parts by weight with respect to 100 parts by weight of water when coloring. However, if it is less than 0.001 part by weight, the color tone of the colored resin powder becomes too light, the color tone of the wax pattern penetrates the resin powder, and the distinguishability between the wax pattern and the resin powder deteriorates. The color tone becomes too dark, and the distinction from the dark wax pattern becomes poor. It is preferably 0.05 to 1 part by weight.

The resin powder is preferably 0.1 to 100 parts by weight with respect to 100 parts by weight of water. Further, in order to obtain the uniformity of color tone, it is desirable to stir until coloring is completed with some stirrer at the time of coloring, but if it exceeds 100 parts by weight, stirring at the time of coloring becomes impossible and a uniform color tone cannot be obtained. . Preferably 0.1 to 50
Good parts by weight. The temperature of water at the time of coloring is preferably 80 ° C to 100 ° C from the viewpoint of coloring efficiency, but it is not limited to this depending on the kind of dye. Further, regarding the color tone, since many waxes that are usually used in a wax pattern have a dark color tone, a bright color tone is preferable in order to more reliably distinguish the wax pattern. Further, by coloring the resin powders for resin pre-crown retainer having different particle diameters in respective color tones, the resin powders having the particle diameters required at the time of use can be identified at a glance.

[0010]

EXAMPLES The present invention will now be described by way of examples, which should not be construed as limiting the invention thereto. As for the evaluation method, first, use Green Inlay Wax, Blue Inlay Wax, and Paraffin Wax made by GC Co.
A test piece with a size of mm is prepared. At this time, the thickness is not specified. Apply an appropriate amount of GC-made retention beads adhesive to the area of one side of this test piece with a brush, sprinkle colored resin powder and adhere it, and visually evaluate the distinction between the test piece and the colored resin powder. did. The reason why the green inlay wax, the blue inlay wax, and the paraffin wax were used at this time is that the waxes used in the wax pattern preparation are very green, blue, and red in color.

Examples 1 and 2 are examples in which Slene Yellow GCN, which is an anthraquinone dye, is used as the dye. Example 3 This is an example using Indanthrene Brilliant Pink R which is an indigoid dye. Example 4 This is an example using the azo dye Orange II. Example 5 Anthraquinone dye Slene Yellow GCN and an indigoid dye Indanthrene Brilliant Pink R
This is an example in which Example 6 This is an example in which slene yellow GCN which is an anthraquinone dye and orange II which is an azo dye are mixed and used.

Further, Examples 1, 2 and 5 are examples in which polymethylmethacrylate is used as the resin powder, and Examples 3, 4 and 6 are examples in which polycarbonate is used. Example 2 is an example in which a large amount of slene yellow GCN, which is an anthraquinone dye, is used, but it does not become dark enough to be distinguished from the wax of the test piece, but does not cause a problem in practice. In Example 5, compared with the case where only Indanthrene Brilliant Pink R was used, Slene Yellow GC was used.
A brighter pink resin powder is obtained by mixing N. Similarly, in Example 6, a brighter orange resin powder is obtained by mixing Slene Yellow GCN as compared with the case of using only Orange II. An arbitrary color tone can be obtained by appropriately mixing and using dyes having different color tones as seen in Examples 5 and 6.

Comparative Example 1 This is an example in which resin powder of polymethylmethacrylate was used without coloring. Since the resin powder is colorless and transparent, the color tone of the wax of the test piece is transparent and the discrimination is poor. Comparative Example 2 This is an example in which resin powder of polymethylmethacrylate is colored by using Slene Yellow GCN which is an anthraquinone dye in a required minimum amount or less. Since the color tone is very pale yellow and the transparency is high, it is not possible to obtain sufficient distinguishability from the wax. Comparative Example 3 This is an example in which the resin powder of polymethylmethacrylate is colored by using indanthrene viriliant pink R, which is an indigoid dye, in a required maximum amount or more. The color tone is very dark red, and it is not possible to obtain sufficient distinctiveness from a wax having a particularly dark tone.

[0014]

[Table 1]

[0015]

INDUSTRIAL APPLICABILITY The present invention is flammable and has a particle size of 30-80.
If resin powder for resin pre-crown that is colored with water-soluble dye is used to make spherical or amorphous resin powder of 0 μm, after applying adhesive to the wax pattern when manufacturing the resin pre-crown. When sprinkling resin powder and adhering,
The wax pattern and the resin powder can be easily discriminated from each other, and it becomes easy to make the wax pattern evenly adhere to the wax pattern and to confirm whether or not the wax pattern is evenly adhered. This is always the maintenance power of resin and hard resin and metal frame,
It is possible to manufacture a resin veneer crown having an excellent edge sealing property, and it is possible to obtain a prosthesis that is stable over time.
Further, by coloring the resin powders having different particle diameters in individual color tones, the particle diameters of the resin powders can be identified at a glance. This can prevent accidental use of resin powder having a particle size different from the particle size required when manufacturing the resin front cover.

Claims (2)

(57) [Claims] 1. A colored resin powder for a resin pre-crown maintaining device, characterized in that a flammable resin powder having a particle size of 30 to 800 μm, which is spherical or amorphous, is colored with a water-soluble dye. 2. A water-soluble dye 0.001 per 100 parts by weight of water.
A colored resin powder for a resin preloading crown maintenance device, characterized by being colored in an amount of up to 10 parts by weight and 0.1 to 100 parts by weight of resin powder.