Ceramic-reinforced composite denture and manufacturing method thereof

Abstract

The invention discloses a ceramic-reinforced composite denture. The crown of the denture includes an inner crown and an outer crown. The inner crown is a PEEK-based ceramic reinforced composite material, the outer crown is made of zirconia ceramic material, and the outer crown is covered with the inner crown. The exterior, the inner crown and the outer crown are connected by dental resin bonding, and the PEEK-based ceramic-reinforced composite material is based on PEEK, CeO 2 -ZrO 2 Composite materials for the reinforced phase. The inner crown material prepared by the invention has good toughness, good intrinsic ductility, high flexural strength and strong fracture resistance, and can fully meet clinical application requirements. The elastic modulus of the inner crown is within the range of bone elastic modulus, which can effectively buffer and share the occlusal impact. The density of the inner crown material is lower than that of cobalt chromium metal and pure titanium metal. It is light and has good elasticity and ductility for long bridge fixed restoration. In addition, the inner crown has good biocompatibility; no artifacts are produced during CT imaging examination; the texture is very light, and the foreign body sensation is minimal; all conventional disinfection methods can be used.

Description

technical field [0001] The invention belongs to the technical field of tooth restoration, and in particular relates to a ceramic-reinforced composite denture and a manufacturing method thereof. Background technique [0002] Fixed dentures are restorations that replace one or several missing teeth in the dentition, including single crowns, fixed bridges and implant dentures. Restorations rely on adhesives or fixtures to connect the abutments together to restore the anatomical shape and physiological functions of missing teeth. Because the patient cannot take and wear this kind of restoration by himself, it is called a fixed denture. [0003] Restoration of fixed dentures requires correct restoration of shape and function, namely the adjoining relationship, occlusal relationship, abduction space and interproximal space, etc., to ensure that it is conducive to periodontal health requirements. The fixed bridge consists of three parts: retainer, pontic and connecting body. Ret...

AI Technical Summary

Problems solved by technology

The internal and external crowns are mostly in hard contact, and the toughness is poor. Compared with natural teeth, the material stress concentration and resultant force transmission are insufficient.

Secondly, metal-ceramic crowns and bridges have obvious shortcomings: 1. The metal translucent color of the metal base has a great influence on the color of the product, and it is difficult to obtain a natural aesthetic effect; 2. Due to the influence of the oral environment, the metal elements in the product will It is gradually released into the oral cavity, causing the gums to change color and affecting the appearance. A small number of patients will be allergic to metal and produce discomfort symptoms; 3. The product is a double-layer structure of metal and porcelain. The thermal expansion coefficients of the two materials are inconsistent, which will lead to porcelain collapse; 4 1. Once the porcelain collapses, it is difficult to repair; 5. The metal restoration in the patient's oral cavity will affect the imaging examination of maxillofacial and skull base CT and MRI, resulting in artifacts

All-ceramic crowns and bridges overcome the shortcomings of metal-ceramic crowns and bridges, and have good biocompatibility and aesthetic effects, but they also have the following shortcomings: 1. The strength of cast porcelain is insufficient, and the product is easy to crack and break during use in the oral cavity ; 2. The aesthetic effect of all zirconia crowns and bridges is poor, and the restoration effect on anterior teeth is not ideal; 3. There is also the problem that porcelain fused with zirconia products is difficult to repair after the surface porcelain cracks; 4. Casting, porcelain Such high temperature can lead to slight deformation of the base crown, and a small gap is formed between the edge of the product and the abutment tooth, which often leads to secondary caries of the abutment tooth; If the color is high, the color reproduction is poor, and the over-strength occlusal surface is harmful to the occlusal teeth