JPH07421A - Dental hard resin sheet - Google Patents

Abstract

PURPOSE:To provide a dental hard resin sheet not generating large difference in the quality of an artificial tooth or medical treatment due to variation in the ability of a dental technician or a densist. CONSTITUTION:A plurality of dental hard resins different in color are superposed one upon another to form a sheet having uniform thickness. A photo- setting resin is used as each of the dental hard resins and a light pervious film 6 is provided to the outer surface of the resin sheet 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-shaped dental resin that constitutes the crown surface of a denture or the surface of a natural tooth.

[0002]

2. Description of the Related Art When producing a denture, it is necessary to match the color of the patient's own tooth, but nowadays, a shade guide adjusted to a dozen or more kinds of tooth surface shades is compared with the color of the tooth. With reference to the number of the shade guide, the paste-like resin with that number was used.
Then, in the work, a series of flow is generally applied in which opaque is first applied to the crown, and then a resin is built up with the instrument to give a form. And finally, if the resin is photocurable, photopolymerize for a period of time,
If it is thermosetting, the denture is completed by heating for a certain period of time.

[0003]

By the way, a natural tooth does not have a uniform surface color, but a neck,
The color tone of dentin and enamel is different, and the layer thickness also affects the color tone. In addition, the shade may differ due to individual differences and age differences. Therefore, it is not necessary to use only one type of resin for building up,
Using 2 to 4 types of resin as appropriate, prepare so that the tooth has a natural crown color similar to the teeth of the individual.

However, it is difficult to faithfully perform color matching with the specified shade guide, and at the same time, it is necessary to rely on experience in order to obtain a natural color tone or unevenness. Therefore, there is a large difference in the quality of the completed crown depending on the skill of the technician, and the quality of the finished product is not uniform.

Therefore, the present invention has an object to solve the above-mentioned conventional problems. In the invention, the inventors have empirically focused on the fact that the samples selected from the shade guide are not diverse and that the teeth that most individuals have are specified by several types in the shade guide. Therefore, it has been found that if a sheet having a standard color tone can be prepared in advance, the time required for the technique can be greatly reduced. In view of this point, in the present invention,
(EN) Provided is a hard dental resin sheet for dental use in which the quality of a denture does not greatly differ depending on the skill of a technician. Further, this sheet can be applied to a laminated veneer restoration method.

[0006]

According to the present invention, first, in the prior art, a technique of selecting a plurality of resins each having a different color for one crown and successively building them is adopted. The basic technique was adopted in which the resin corresponding to the neck, dentin, and enamel was made into a single sheet in advance, and the sheet was attached to the operced crown surface. Specifically, a plurality of hard dental resins each having a different color were stacked and formed into a sheet having a uniform thickness to obtain a hard dental resin sheet. Further, a photo-curable resin is used for the hard dental resin, and a translucent film is provided on the outer surface of the resin sheet to solve the problems in the conventional example.

[0007]

Function A plurality of hard dental resins are intended to bring the surface color of natural teeth close to each other, and are elements for producing delicate dentures. In addition, making the resin into a sheet with a uniform thickness facilitates attachment to the crown surface,
It is easy to make corrections with a spatula later. on the other hand,
The light-transmitting film provided on the surface of the resin sheet has a function of preventing the resin surface from coming into contact with air and eliminating the non-polymerizable portion, and at the same time, a function of protecting the surface of the resin sheet.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a sheet according to the present invention, in which a plurality of types of shades are given to one sheet in advance. Here, 1 is a seat body, 2 is a first layer made of a resin corresponding to a neck, 3 is a second layer made of a resin corresponding to dentin, and 4 is a first layer made of a resin corresponding to enamel. There are 3 layers. Each resin has a known structure, and a photocurable or thermosetting resin is used. However, if the first layer is photo-curable, the remaining layers are also photo-curable, and if the first layer is thermo-curable, the remaining layers also employ thermo-setting resin. The height h of the sheet 1 is set to a value corresponding to the standard tooth length, and the thickness t is set in the range of 0.5 mm to 1.5 mm. Then, first, a shape corresponding to the crown shape is cut out from the sheet 1, and the cut sheet 1 is attached to the opaque-coated portion of the denture, and the sheet 1 is pressed with a finger, a spatula, or the like to give a natural uneven shape. And then polymerize.

If the resin used is a photo-curable resin, the sheet 1 cannot be left unattended, so it is necessary to shield it from light until just before use. FIG. 2 shows a resin sheet as a product, and the mount 5 is provided on the surface on the crown side, but it is preferable to use a mount having a light blocking property in order to block light as much as possible. A transparent film 6 is provided on the outer surface. Then, when it is stored, it is stored in a light-shielding container. When using the present sheet 1, first, the sheet 1 is cut together with the light-transmitting film 6 according to the surface shape of the crown, peeled from the mount 5, and then attached to the opaque-treated crown. Then, the light-transmitting film 6 is lightly shaped with a spatula or the like and photopolymerized. The translucent film 6 may be removed immediately before photopolymerization, but it is effective to remove it after the resin is cured by photopolymerization. That is, in the photopolymerizable resin used for the sheet 1, the surface layer exposed to the air inhibits the photopolymerization by oxygen. Therefore, if the transparent film 6 is removed before the photopolymerization, it is the same as the conventional one at the final stage. First, the unpolymerized layer on the surface must be polished. Therefore, if the transparent film 6 is removed after the polymerization, the processing step can be omitted, and the required time can be shortened. Further, the transparent film 6 protects the resin surface and improves the flatness of the molded resin surface even at the time of imparting the form.

On the other hand, when the resin sheet is thermosetting, the light-shielding property of the mount 5 shown in FIG. 2 is not necessary, but the mount exists to protect the surface of the sheet 1 and improve workability. Is preferred. Further, it is preferable to coat with a film to protect the surface on the other side. However, it is needless to say that the film is removed before heating since it is necessary to heat it for the polymerization.

In this embodiment, the resin composed of three kinds of colors was used, but the number of resins is not limited to this, and even two kinds can be sufficiently dealt with depending on the individual. If three types are not available, each layer may be composed of four types of resins. Although the thickness of the sheet 1 is set to 0.5 to 1.5 mm, it goes without saying that some errors in the upper limit value and the lower limit value are included in the scope of the present invention.

Although the seat 1 is used for the crown in this embodiment, it can be used for a chair side laminated veneer restoration method. That is, it goes without saying that treatment is possible by adhering the sheet 1 matching the color of another tooth to the part where the surface of the tooth has been scraped off and polymerizing it.

[0013]

As described above, according to the present invention, a plurality of hard dental resins are superposed and formed into a sheet having a uniform thickness. Therefore, after the opaque is applied to the crown, the sheet is immediately attached to form a detailed form. It was possible to add it, and it became possible to greatly reduce the processing time. In addition, since the color matching and the molding, which conventionally depended on the experience of the technician, can be standardized, there will be no big difference in the finish depending on the skill of the technician. In addition, by preparing a plurality of sheets having different shades in advance, it is possible to deal with almost all individuals, so that it is possible to suppress not only the processing time but also the cost, and further the price of the denture can be lowered. . Therefore, by coexisting the product of the present invention and the conventional molding method, the patient has a wider range of choices for the denture.

On the other hand, when a photo-curable resin is used as the hard dental resin and a light-transmitting film is provided on the outer surface of the resin sheet, an unpolymerized surface layer can be formed by photopolymerization. Since there is no such process, the step of polishing the surface layer unlike the conventional case is unnecessary, and the required time can be shortened significantly. Moreover, since the light-transmitting film protects the surface of the sheet, it is possible to avoid scratches and the like, and it is possible to obtain a high-quality denture.

Further, since it can be easily applied to the laminated veneer restoration method on the chair side, its range of use is very wide.

[Brief description of drawings]

FIG. 1 is a sectional view of a sheet of the present invention,

FIG. 2 is a cross-sectional view showing another embodiment.

[Explanation of symbols]

 1 sheet body 5 mount 6 translucent film

Claims (2)

[Claims] 1. A hard dental resin sheet, comprising a plurality of hard dental resins each having a different color, which are stacked to form a sheet having a uniform thickness. 2. The dental hard resin sheet according to claim 1, wherein a photocurable resin is used as the dental hard resin, and a transparent film is provided on the outer surface of the resin sheet.