Computer-aided design making method for dental personalized integrated non-metal post core

Abstract

The invention discloses a computer-aided design making method for a dental personalized integrated non-metal post core. The method comprises the following steps of: 1, performing tooth preparation to make a silicon rubber impression duplication defect tooth form; 2, acquiring impression three-dimensional data by using a high-accuracy optical scanner; 3, selecting a proper crown core from a database; 4, finishing stitching and processing of defect root canal and section data and crown core data through three-dimensional design software, and establishing a virtual model for the personalized integrated post core; and 5, importing post core data in an STL (Standard Template Library) format into a computer-aided making numerical control center, and selecting a proper non-metal blank to process into a personalized integrated post core entity. Through the computer-aided design making method for the dental personalized integrated non-metal post core, the processes of perfusion of a plaster model, making of a wax pattern and the like are saved, a processing period is shortened, a making error is reduced, higher accuracy can be achieved, the post core entity and the remaining tooth tissue have better fitness, the fracture resistance of a post core prosthesis can also be enhanced, and the risk of repair failure is reduced.

Description

【Technical field】 [0001] The invention relates to the field of computer-aided design and production of dental restorations, in particular to a personalized integrated non-metallic post-core computer-aided design and production method for repairing large-area tooth defects. 【Background technique】 [0002] In the clinical work of oral restoration, there are many patients whose teeth are severely damaged due to caries, trauma, bad restorations and other reasons, resulting in residual crowns and roots, which seriously affect the appearance and function. The post-core restoration technique is currently recognized as an ideal method for the treatment of residual crowns and roots. The post-core is structurally composed of the post and the crown-core. The post is cemented in the root canal of the affected tooth to provide retention for the crown-core above and also play a role in strengthening the root; the main function of the crown-core is to connect with the remaining tooth tissu...

AI Technical Summary

Problems solved by technology

[0009] At present, many sets of computer-aided design / computer-aided manufacturing (CAD / CAM) systems have been developed abroad and gradually applied to the production of dental crowns, fixed bridges, inlays, veneers and other restorations. The virtual model is encapsulated data and cannot be imported into the open computer-aided manufacturing CNC center

Some scholars have reported that digitalization can be completed by making impressions, pouring plaster models, making wax-ups, and then performing three-dimensional scanning on the wax-ups, and finally cutting and processing to generate personalized integrated non-metallic post cores. However, this process does not include computer-aided design steps. Moreover, the operation process is cumbersome and requires the cooperation of the model room, which increases the risk of error

Some scholars tried to establish a three-dimensional virtual model by performing tomographic scanning of the affected tooth with spiral CT. However, due to the excessively large layer spacing (0.5 mm) of the spiral CT scan, the accuracy of the generated three-dimensional data was insufficient, which could not meet the accuracy requirements of clinical post-core restoration. Moreover, CT scanning High cost and risk of radiation damage to patients

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