Gypsum-free novel digital post-core impression collection and model building technology

Abstract

The invention relates to a gypsum-free novel digital post-core impression collection and model building technology, and belongs to the technical field of post-core restoration of prosthodontics. The technology comprises the steps as follows: making local impression of a diseased tooth and performing optical scanning to obtain complete post canal information; performing optical scanning on the dentition and occlusion relationship in the mouth of a patient to obtain a digital model of the abutment crown shape, dentition and occlusion relationship; and matching the digital model established by optical scanning of the traditional post-core impression with the established dentition digital model to obtain the dentition and occlusion relationship model containing the complete post canal information, and performing subsequent design and processing of the root post and crown core. The defect that the complete post canal information cannot be obtained by direct oral scanning is avoided, and thedefect that complete crown information cannot be obtained when the abutment crown grows up and post-core impression is scanned is also avoided. The digital model obtained based on the technology canbe used for 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 technology without gypsum, 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 cus...

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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