A three-dimensional dental model segmentation method for computer-aided stealth orthodontics

Abstract

The invention relates to a three-dimensional dental model segmentation method for computer-aided stealth orthodontics, which comprises the following steps: step 1, reading a triangular mesh dental model; step 2, simplifying the model; step 3, marking a tooth seed point and a dental see point; step 4, setting a threshold value, and forming a tooth contour line through the set characteristic regionand the diffusion operation; step 5, repeating that step 4 until the diffusion of all tooth seed point is finished; step 6, carrying out tooth side bypass; step 7, obtaining a hole mesh model; step 8:integrating the step 4 and the step 7 to obtain the final single tooth model. There are few interactions and simple interactions, even if there are some errors, the results of tooth segmentation arenot impacted. Through repair of the holes between teeth, the shape of the teeth can be automatically restored, so that a single tooth with lateral shape can be separated, the boundary of the segmentedtooth is clear and accurate, andfurther treatment is convenient in the later stage.

Description

technical field [0001] The invention relates to tooth segmentation for invisible orthodontics, in particular to a three-dimensional tooth and jaw model segmentation method for computer-aided invisible orthodontics. Background technique [0002] Oral disease is a common multiple disease. According to the statistics of the World Health Organization, malocclusion has become one of the three major oral diseases (dental caries, periodontitis and malocclusion). In my country, the incidence rate of malocclusion is as high as 40%. Currently, orthodontics is considered an essential and important part of oral health care. At the end of the 1990s, a brand-new orthodontic technology emerged internationally: invisible orthodontic technology without brackets. This technology is the product of the latest computer graphics image processing and aided design technology and rapid prototyping technology applied in the field of orthodontics. It wears an elastic orthodontic device that is diff...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art that the three-dimensional jaw model is directly segmented without processing the interdental fusion area, the present invention provides a three-dimensional jaw model segmentation method for computer-aided invisible orthodontics, which is simple and accurate, and can The side is automatically repaired, less interactive operations are required for tooth segmentation, and the segmentation efficiency is high

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