JPH05220178A - Material for dental prothesis - Google Patents

Abstract

PURPOSE:To provide the material for dental prothesis for producing an aesthetically excellent dental plate by producing the dental prothesis in the state of particularly maintaining molar parts as connected teeth by simple stages. CONSTITUTION:This material for the dental prothesis is formed by previously bringing artificial teeth into pressurized contact with the uncured or half cured material for the dental plate, such as acrylic resin to insert these teeth therein. Such material is placed directly on the pattern of the oral cavity and is cured, by which the dental prothesis having excellent performance and appearance is obtd. The molar parts are made in the connected state and the anterior tooth parts for which an aesthetic property is demanded are formed independent and, therefore, the arrangement and morphoadjustment of the artificial teeth of the artificial teeth are extremely easy as the entire part of the dental prothesis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a denture material for easily producing a plate denture.

[0002]

2. Description of the Related Art There are resin dentures and metal dentures as plate dentures, and acrylic dentures, which are resin dentures, are the most common. The manufacturing process of a plate denture is complicated. For example, for acrylic dentures, first make a wax denture with wax and artificial teeth on the oral model, and then
After burying the wax denture in the flask and curing the investment material, rinse the wax with hot water to make a mold for the denture, and press the dough containing acrylic monomer and acrylic polymer into the mold to heat-polymerize. ..

According to the above-mentioned method, when adjusting the shape of the denture, the denture shape is made by using a wax having an excellent operability, the shape of the denture is accurately transferred by plaster embedding, and the dough is added to the plaster mold. Since they are polymerized while being pressed in a pressure state, there is an advantage that a delicate denture form can be beautifully manufactured in detail. However, in this method, the part finally formed by the acrylic resin is first made of wax, the artificial teeth are arranged to manufacture the wax denture, and then the wax denture is buried in the flask with plaster, which is a complicated procedure. After the gypsum hardens, the wax is removed to form a cavity, and the dough is pressed into the cavity to polymerize, which is the longest and most troublesome step in the dental technician's operation.

In order to shorten the above-mentioned troublesome steps, an acrylic material which is polymerized by light is used as a floor material, and an uncured floor material is placed directly on the oral model without producing a wax denture. A method of arranging artificial teeth and polymerizing them by light to obtain an acrylic denture is proposed. However, in this method, the operability of the uncured flooring material is poor compared to the case where the shape of the denture is adjusted with wax, and therefore the arrangement of artificial teeth becomes difficult in the work of adjusting the shape of the denture. In addition, it is difficult to form the detailed shape of the denture, and it is particularly difficult to fill the cervical part with the floor material, which is a problem from an aesthetic point of view. Further, there is a drawback that air bubbles are easily mixed in the overlapping portion of the floor resin, and there is still room for improvement from an aesthetic and material standpoint.

[0005] Further, although the molars are arranged according to a straight line of the alignment reference line and a virtual occlusal plane, the molars are embedded in a flexible uncured or semi-cured floor material in which each tooth is independent. In this case, it is necessary to adjust the occlusal height diameter for each molar, and the alignment operation becomes complicated.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a denture for producing a denture base excellent in aesthetics by a simple process, in particular, by producing a denture with a molar tooth as a connecting tooth. The challenge is to obtain materials.

[0007]

According to the present invention, a denture material in which artificial teeth are arranged in advance on an uncured or semi-cured floor material is placed directly on an oral cavity model without the need for complicated steps such as production of a wax denture, and polymerization is performed. Thus, the present invention relates to a denture material for producing a plate denture, in particular, by simply using an artificial tooth having a molar part as a connecting tooth in advance or after pressure-bonding to the material for the floor, simply by connecting. In addition, the present invention relates to a denture material for surely manufacturing a plate denture. In the denture material of the present invention, the uncured or semi-cured floor material and the artificial tooth are pre-bonded,
The work of arranging artificial teeth on the oral model is unnecessary, and occlusal adjustment is possible by simple movement of artificial teeth. Further, the state of filling the floor resin into the cervical part, which is an aesthetic problem, is also good. Further, since the molars are connected in a straight line in advance on the virtual occlusal plane, it is very easy to arrange the molars, and the molars can be accurately arranged according to the occlusal theory.

The denture material of the present invention comprises an artificial tooth and a floor material. As the artificial teeth, any of acrylic resin teeth, hard resin teeth, ceramic teeth, metal teeth and the like can be used. The floor material is not particularly limited as long as it can maintain a soft state during the dental technique operation using the articulator, and examples thereof include an uncured or semi-cured acrylic resin. As the acrylic resin, a heat polymerization type, a photopolymerization type, a dual cure type of a combination of the two or the like can be used, but the photopolymerization type is the most preferable in consideration of the storability of the material and the operation process.

In the denture material of the present invention, in the case of a complete denture,
The front teeth are pressed and embedded in the floor material in a state where each tooth is independent and the molars are connected in accordance with the virtual occlusal plane. Therefore, the artificial teeth can be easily arranged in the molars, and the morphology can be freely adjusted in the anterior teeth that require aesthetic artificial teeth arrangement.

In the case of a local denture, if the posterior teeth are two or less on one jaw, even if the posterior teeth are connected, the operation of arranging artificial teeth cannot be simplified. However, if the number of molars is three or more, the operation of arranging the artificial teeth becomes easy as in the case of the complete denture. The local denture material can be manufactured by supplying the parts to be manufactured all at once, but in that case, a large number of material shapes corresponding to various cases are required, which is not economical. Therefore, in the case of a local denture, it is preferable to supply the front tooth part and the molar part separately.

As a method of connecting the molars, a method of manufacturing the molars as a connecting tooth or a method of arranging existing molars on the occlusal plane plate and then connecting them with a curable acrylic resin is used. At this time, from the aesthetic point of view, it is desirable that the shape of the connecting portion be thin on the buccolingual side so that the joint portion of the artificial tooth is not exposed from the surface of the denture base.

[0012]

The present invention will be described in more detail with reference to the following examples. Example Based on the occlusal theory of dentistry, a mold was prepared in which artificial teeth were arranged, and a pair of right and left molar roots were connected with a room temperature chemically polymerized acrylic resin, and then a photopolymerized acrylic resin was filled and compressed. .. The denture material in which the connecting molars and front teeth were embedded was taken out of the mold, and the photopolymerizable acrylic resin was semi-cured with weak light. After placing the oral model on the articulator, the above-mentioned denture material was attached to the occlusal plane plate attached inside the articulator via a jig capable of fixing molars to adjust the form of the denture. The denture whose shape had been adjusted was placed in a photopolymerizer together with an articulator to cure the resin. Next, a room temperature chemically-polymerized acrylic resin was filled in the gap between the denture bases of the oral model and cured to produce a denture. Further, according to a standard method for dentistry, cutting and polishing were performed to complete a denture. As a result, a denture having excellent occlusal property, esthetic property, and mucosal compatibility was obtained.

[0013]

EFFECTS OF THE INVENTION By using the denture material of the present invention, it is possible to manufacture a denture excellent in occlusal property, aesthetics, etc. by an extremely simple method as compared with the conventional method using a wax denture. .. In particular, by setting the molars in a connected state, it is extremely easy to arrange the molars, and the front teeth are very easy to adjust the shape because each tooth is independent.

Claims (1)

[Claims] 1. A denture material in which artificial teeth are pressed and embedded in an uncured or semi-cured denture base material, wherein a molar is used as a connecting tooth.