Chimeric post-core body, and preparation method and application thereof

Abstract

The invention discloses a chiseled post core body and its preparation method and application. The chiseled post core body is formed by interfitting a main post core and an auxiliary post core, and the main post core and the auxiliary post core are both composed of a post and The core at the top of the post is integrally formed; the cores are fitted with each other, and the longitudinal joint surface between the cores is parallel to the post of the auxiliary post core. The invention divides the post and core into two or three parts into root canals with different directions, enhances the retention force of the post and core through friction force and locking effect, and improves the fracture resistance of teeth, and is especially suitable for multiple canals with non-parallel posterior teeth Restoration of residual roots and crowns.

Description

technical field [0001] The invention relates to a chimeric post-core body and its preparation method and application. Background technique [0002] Severe defects in the posterior crown require the use of post-core restorations to provide sufficient retention and resistance for the crown restoration. At present, the post-cores commonly used clinically to repair posterior tooth defects are cast metal post-cores and pre-formed fiber post-resin cores. Although the traditional cast metal post core has good adhesion and strength, the metal post has disadvantages such as corrosion, allergies, toxicity, and influence on NMR diagnosis, and the elastic modulus of the metal material is much higher than that of the tooth root, which may cause tooth root splitting when stressed. Cracks, opaque metal posts and cores combined with all-ceramic crowns cannot achieve the desired aesthetic effect. Compared with metal posts, fiber posts not only have a modulus of elasticity close to that of ...

AI Technical Summary

Problems solved by technology

However, when prefabricated fiber posts are used, the core body needs to be stacked and formed with light-cured resin. Due to the existence of the post-core bonding interface and the brittleness of the resin itself, the resin core may be broken during the long-term chewing force process and cause the crown to fall off. In addition, , the pre-fiber post cannot be changed in size, and the matching with the root canal is poor, increasing the possibility of falling off

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