A Novel Digital Post-core Impression Acquisition and Model Establishment Method Without Plasterization

Abstract

The invention relates to a novel digital post-core impression collection and model building method without gypsumization, and belongs to the technical field of post-core restoration in oral prosthodontics. Take a partial impression of the affected tooth and perform an optical scan to obtain complete information on the post path; perform an optical scan on the dentition and occlusal relationship in the patient's mouth to obtain a digital model of the crown shape, dentition and occlusal relationship of the abutment tooth, and then the traditional post-core The digital model established by the optical scanning of the impression fits the established digital model of the dentition, and then the dentition and occlusal relationship model including the complete post information is obtained, and the subsequent design and processing of the root post and crown core are carried out. It avoids the disadvantage of not being able to obtain complete information of the post by direct intraoral scanning, and also avoids the disadvantage of not being able to obtain complete information of the crown when the crown of the abutment tooth grows and scans the impression of the post and core. The digital model obtained based on this technology can be used in computer-aided design, and then combined with 3D printing or CAD / CAM technology to achieve stable and accurate digital machining.

Description

technical field [0001] The invention relates to a novel digital post-core impression collection and model building method without gypsumization, and belongs to the technical field of post-core restoration in oral prosthodontics. Background technique [0002] Tooth defect is one of the most common diseases in dental restoration clinics, among which residual crown and root are serious tooth defects, accounting for a considerable proportion. With the change of concept, more and more patients hope to keep the affected teeth, which also promotes the continuous development of post-core restoration, a residual crown and residual root preservation technology. [0003] At present, post-cores commonly used in clinical practice include prefabricated piles and custom-made piles. Among prefabricated piles, fiber piles are the most widely used due to their advantages such as fewer visits to the doctor and aesthetic characteristics, but their range of indications is not as good as that of ...

AI Technical Summary

Problems solved by technology

However, this method also has disadvantages, such as more accessories and cumbersome operation steps. In addition, in recent years, it has been reported that the adhesion of post and core made by all-digital technology is even lower than that of traditional impression technology. Large gap, this is because only a few types of scanning posts have been developed, it is impossible to be suitable for the piles with various clinical shapes, lengths, and direct differences. In many cases, it is impossible to reach and record the root canal. Bottom related

Later, some scholars proposed semi-digital technology, that is, optically scanning the model to obtain pile path information after making traditional impressions and pouring plaster models. Although this avoids the defects of scanning columns in full-digital technology, it involves again The preparation of traditional impressions, in particular, requires multiple steps such as the filling of plaster models, which obviously loses the advantages of digitalization

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