JPS5883953A - Preliminary mold plate for denture formed by impression of metal plate - 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 preform plate in the process of manufacturing a metal coining denture base.

Conventional metal denture bases have traditionally been cast. Metal casting denture bases require a series of complicated manufacturing processes, which leads to high costs, and because they are cast, they have the drawback of being brittle and heavy due to the formation of cavities. Therefore, the cost can be reduced through a process that facilitates manufacturing, and thin and light metal coined denture bases are preferred in terms of use. In addition, it is excellent in that the coined denture base in use can be reformed by pressing again to prevent deformation of the alveolus due to flesh absorption, adhesion of tooth extraction sockets, etc. Such a floor change is impossible with a cast floor.

On the other hand, common sense predicts that it will be difficult to press-form a substrate into a complex shape using /r,r steel, a stainless steel substrate that is particularly preferred as a metal. It's difficult. For this reason, research has turned to the development of new synthetic resin materials to replace metal bases, and resin denture bases are currently being offered, but the denture base has drawbacks in deformation resistance and wear resistance. However, it is not as bad as a metal floor. For the time being, metal coined denture bases should be the mainstream, so it is important to find a solution to the difficulties in forming metal coined denture bases.

Then, molding is performed seven or more times step by step using a yin-yang mold between the silicone rubber mold and a metal mold made from a low-melting metal, and finally molding is performed using the yin-yang mold of the metal molds. However, this type of production is a one-piece production, and the size and shape of edentulous and edentulous jaws may vary. There are many different types of presses, and the number of presses must be determined by visually confirming the characteristics of the moldability of the seven rounds of molding and determining the necessity of the next round of molding. It is uncertain, and there are still problems in terms of time and effort and cost reduction.

In view of the above, the present invention creates a preformed plate in which a concave surface is formed on a metal substrate, the contour line of which is low in the center area and high in the peripheral area when viewed from the back side of the viscosity surface, is the same shape as the alveolar crest line,
The contour zone of the peripheral region of the concave surface of this preformed plate is pressed from the back side of the mucosal surface of the substrate toward the mucosal surface side,
By forming the maxillary palate in a convex shape when viewed from the mucosal surface side, the purpose is to uniformly and precisely form the final molding of all shapes known from many years of experience.

Hereinafter, the present invention will be specifically explained in detail by referring to embodiments. The contour line diagram shown in Figure 3 is the final form of the metal coined denture base, and if a resin base is affixed to this and artificial teeth are implanted, it will become a denture. 7 cases). In this or other figures, plus signs indicate high points and minus signs indicate low points. In addition, since the back side of the paper in FIG. 3 becomes the mucosal surface when the denture base is attached to the upper jaw, this will hereinafter be referred to as the mucosal surface side. In general, a maxillary denture base consists of a concave part 3 that comes into close contact with the concave surface of the maxillary palate, and an alveolar part 3 that has a convex zone around the periphery when viewed from the back side of the mucosal surface (front side of the paper) and comes into close contact with the alveolus. In general, the apex line of the alveolar crest of the alveolar portion 3 is
It becomes a wavy line according to the wavy surface of the alveolar region. As seen in the contour map, the contour lines of the denture base are y isomorphic (
It is a so-called horseshoe shape). Furthermore, the palatal concave surface portion is concave in contrast to the convex shape of the alveolar portion 3.

A preformed plate that is uniformly formed in advance before the final molding of such a denture base! is shown in Figure 6. This plate! is pressed into a concave shape from the front side of the paper toward the back side, as shown by the symbols in the figure. For example, ir with a thickness of θ, jmm to θ, gmm,
rMake a depression 6 in a stainless steel circular substrate using a shallow drawing die.
It was created by If the contour line height around the substrate is zero, the contour lines of the recessed part are all negative, and these contour lines are isomorphic to the maxillary palate. The steeply sloped surface 7 is an unnecessary portion and will be cut off later. The front side of Figure 6 corresponds to the back side of the mucosal surface.

It is sufficient for such preformed plates to have λ patterns for each of the areas of the grooves 6 and the depths of the grooves 6. If you make one with a large area and a deep depression in advance and use only the part near the center for a small denture base, you can use seven types of materials, but the material that can be cut and picked up is that large. It would be better to make 2 types or 9 types in advance, since it would be wasted.

When the preformed plate shown in Figure 2 is fully formed, it is completely squeezed as shown in Figure 2, and the preformed plate! The periphery of the plate is drawn toward the center, and the overall outline is slightly smaller than the original, but the preformed plate! On the contrary, the area around Nokuhomi 6 is stretched and expanded. In other words, the high contour zones on both sides of the concave surface of the preformed plate are pressed from the mucosal surface side to its back surface, resulting in a convex alveolar region when viewed from the back side of the mucosal surface (front side in Figure 2). This is how it is formed.

A wax sheet or the like is often attached to the alveolar part of one mold (actual plaster model) to create a form that serves as a maintenance device for artificial tooth alignment and resin attachment. This is done so that forms such as mesh, ridges, and small holes appear in the alveolar area of the completed metal denture base (as shown by 20 in Figure 2), and artificial teeth are implanted into the uneven alveolar area of the completed denture base. The attachment is for attaching resin and increasing the adhesion strength. In order to add such a resin retaining device to the denture base, better elongation and drawing are required when molding the metal denture base, but when molded with a preformed plate as described above, It has been empirically confirmed that the preformed substrate j has very good elongation.

If main forming is carried out without using such a preformed plate, cracks or wrinkles may occur at the deep drawing area, which may extend to the main body of the process, but when the preformed plate of the present invention is used, this is extremely A denture base that not only stretches well and has no cracks or wrinkles but also does not become thinner and has an average thickness over the entire base is completed.

An example embodiment of the production of a preformed plate is shown below. No. r
As shown in the figure, a disk 9 or a shogi piece shape is made by punching, and the disk is marked with the midline position /θ as shown in the figure.
(Small protrusions that protrude from the front side of the paper) are inserted. In addition, the upper protrusion of the board punched out in the shape of a piece is located at the midline.

This is placed in the correct pressing position on a flat steel plate surface with its midline aligned, and pressed with a rice ball-shaped hard metal flat plate upper die /2 with many round protrusions shown in Figure 2. ,? Make many round indentations on the surface of the steel and stainless steel board. Then, turn it over and press it with a metal upper die /3 which has the same shape but is smaller than the above-mentioned die /2 and has an uneven pattern with an irregular mesh. creates a plate with a mesh pattern.

Such a plate may be used for main molding.

When a patterned plate is preformed according to the present invention, a preformed plate! The mucous membrane side has a round hole pattern, and the back side has a mesh pattern. The above-mentioned metal upper molds /2 and /3 have dimensions as illustrated in FIG. 2 and FIG. There is a mesh pattern on the front side of the 2
A round hole pattern is included on the front side of the image surrounded by the dotted chain line.

In this example, the round hole porous surface increases the adsorption of carbon when attached to the palate of the upper jaw, while the mesh pattern, commonly called states pull, eliminates the discomfort caused by wearing dentures and improves the sensation on the tongue. . In this case, both sides are required, but it is also possible to use one side at a time. There is a mark for the midline position on the preforming plate, but it is essential for correctly determining the above-mentioned pattern position 111 on the first press during main molding. Second
The part surrounded by thick lines/g in the figure is the denture base, so the outside part is cut off with scissors, cut out with a grinder, etc. to match the outline of the base, and polished. Artificial teeth are arranged in the alveolar region corresponding to the gingiva of the denture base thus completed, and a gingiva-colored resin is attached to complete the metal coining original prosthesis m (for edentulous upper jaw) shown in FIG. (Note: In Figure 1, only the right side is completed for illustration purposes.) When the preform plate is actually formed, it is not limited to cases in which metal molds are used for both Yin and Yang, but also in cases where the forming form is complex and the unevenness rises abruptly. In some cases, either Yin or Yang uses a mold made of rubber (for example, silicone rubber, which was used to shape the original plaster wedge). When main molding is performed in multiple stages, whether one stage is a rubber mold or both are metal molds,
Both may be multi-staged. Even when molding is easy, when the preformed plate of the present invention is used, the finished product becomes more precise. When molding is easy, metal molds can be used for both Yin and Yang, and molding can be done only once, which greatly shortens the molding process.゛Also, by using a pre-formed plate, it is unnecessary or easy to make corrections such as grinding or punching, which would otherwise be required each time molding is performed, and from this aspect as well, the process time can be significantly shortened. It is possible.

According to a rule of thumb, the present invention makes molding extremely easy by molding a convex alveolar part on both sides of a concave surface having a so-isomorphic contour on the alveolar crest line and the palate. Therefore, it is possible to easily provide a metal coined denture base with a strong average thickness.

Although the above description has mainly been given to those for the edentulous upper jaw, the present invention is also applicable to those for the edentated and lower jaws.However, for the upper jaw, the concave part 6 remains as the palate, but in the case of the lower jaw, the concave part B is cut off leaving the alveolar ridge. Therefore, the concave-convex pattern of states pull is only found in upper teeth.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a general coined full-rope denture base, Figure 2 is a cross-sectional view taken along the line ■-■ in Figure 1, Figure 3 is a plane contour view showing a gold Ar4 denture base, and Figure 9 The figure is a sectional view taken along the line N-IV in Figure 3. The figure is a sectional view taken along the line V-V in Fig. 1, Fig. 6 is a plane contour diagram of the preformed plate of the present invention, and Fig. 7 is an intermediate formed plate formed when main forming is started using the preformed plate. Figure 1 is a plan view showing the plate before preforming, Figure 1 is a plan view showing a mold for dimple processing, and Figure 1θ is a plan view showing a mold for stapling. Ko00. concave portion, 300. Alveolar part, g09. Alveolar crest, 1
．． ,, preformed plate, 691. Full. −／／−

Claims (1)

[Claims] /A concave surface with the same shape as Y is formed on the metal substrate in the shape of a dental arch, where the contour line is low in the center area and high in the peripheral area when viewed from the back side of the mucosal surface. 1. A preformed metal plate for a coined denture base, characterized in that the plate is pressed from the back side of the mucosal surface of the substrate toward the mucosal surface side to form a convex palate when viewed from the mucosal surface side.