Molding method of metal-ceramic denture

Abstract

The invention discloses a stacking and molding forming method for a porcelain-fused-to-metal false tooth. The method comprises the following steps: determining a central line, a tooth position and length of a base crown; stacking body porcelain powder to the surface of an opaque porcelain layer from a lip side and / or a buccal side, and stacking the body porcelain powder to an occlusal surface and a lingual side in sequence; modifying to form a body porcelain layer with the thickness of 0.4-1.0 mm; stacking and mixing to form pasty transparent porcelain powder according to the tooth position from an adjacent groove; stacking a protrusion close to a center and a protrusion far away from the center by the transparent porcelain powder in sequence to form a rough tooth position and a tooth-shaped transparent porcelain layer; modifying the transparent porcelain layer to ensure that the thickness of the formed transparent porcelain layer is 0.28-0.32 mm and a high point of an occlusal head is higher than an occlusal shape by 0.4-0.6 mm; baking. As the transparent porcelain powder is stacked from the adjacent when the transparent porcelain layer is molded by stacking, the adjacent groove is filled with the porcelain powder; during baking, due to a binding effect of the porcelain powder in the adjacent groove, a situation that a false tooth germ body excessively shrinks in a position where two teeth are adjacent to form an excessively large gap cannot be caused, the influence on quality of a finished product due to shrinkage of the porcelain layer is avoided, and the product quality and the user experience are improved.

Description

technical field [0001] The invention relates to the technical field of oral cavity fixed restorations, in particular to a method for overmolding metal porcelain fused to metal dentures. Background technique [0002] Oral fixed restoration is a kind of denture method applied to the restoration of missing teeth. At present, more and more metal-ceramic dentures are used clinically when repairing missing teeth. Porcelain-fused-to-metal denture is a restoration made of porcelain powder sintered at high temperature and fused to the surface of the metal inner crown. It has the advantages of good mechanical strength of cast metal and beautiful appearance of all-ceramic denture. It is an ideal restoration. [0003] However, since the porcelain powder will shrink after high-temperature sintering, it is difficult to precisely control the shape, especially when making tooth rows, often due to the shrinkage of the porcelain layer, it will cause deformation, or the gap between the teeth ...

AI Technical Summary

Problems solved by technology

[0003] However, since the porcelain powder will shrink after high-temperature sintering, it is difficult to precisely control the shape, especially when making tooth rows, often due to the shrinkage of the porcelain layer, it will cause deformation, or the gap between the teeth will be too large, which will affect the quality of the finished product and the user experience.