A 3D Dental Model Segmentation Method for Computer-Aided Invisible Orthodontics

Abstract

A method for segmenting a three-dimensional jaw model for computer-aided invisible orthodontics of the present invention comprises the following steps, step 1, reading the triangular mesh jaw model; step 2, simplifying the model; step 3, marking the tooth seed point and Jaw seed points; step 4, set the threshold, and form the tooth contour line through the set feature area and diffusion operation; step 5, repeat step 4 until the diffusion of all tooth seed points is over; step 6, bridge the tooth side; step 7, Obtain the hole mesh model; step 8: integrate step 4 and step 7 to obtain the final single tooth model. There are few interactive operations and simple interactive operations, even if there is a certain error, it will not have a big impact on the tooth segmentation result. By repairing the interdental holes, the tooth shape can be automatically restored, and a single tooth with a side shape can be separated, so that the boundary of the divided tooth is clear and accurate, and it is convenient for further treatment 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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