Tooth root extraction method based on oral CBCT image

Abstract

The invention discloses a tooth root extraction method based on an oral CBCT image, and the method comprises the following steps of S100, carrying out the optical scanning, obtaining a three-dimensional tooth jaw and dentition model, and building a projection image and a CBCT file sequence; S200, analyzing the CBCT file sequence through a Marching,Cube and a region growing algorithm; S300, based on the CBCT file sequence, distinguishing the upper tooth jaw and the lower tooth jaw, wherein the distinguishing process comprises the steps that the key frames of the occlusal plane and the sagittalplane are positioned through VTK, and a restrictive region growing algorithm is executed; S400, optimizing the segmentation effect of upper and lower tooth jaws, and manually cutting the tooth jaw model; and S500, removing the noise image of the cut tooth jaw model, and smoothing the noise image. According to the present invention, the surgical risk is reduced, and the surgical success rate is increased.

Description

technical field [0001] The invention relates to the technical field of oral CBCT image processing, in particular to a tooth root extraction method based on oral CBCT images. Background technique [0002] At present, there are mainly two dental panoramic image generation methods in clinical practice: the dental panoramic X-ray photography method and the method of obtaining volume data after oral CBCT reconstruction. [0003] The dental panoramic X-ray photography method mainly uses X-camera and flat panel detectors to move in a special trajectory, collects images of specific positions during the movement, and finally combines the acquired sequence images into a dental panoramic image, which is There are equipment to directly collect and obtain, which has a certain radiation to the human body. The disadvantage of this method is that only two-dimensional projection data of teeth can be obtained, and the morphological information of three-dimensional space of teeth cannot be obt...

AI Technical Summary

Problems solved by technology

[0005] In recent years, more and more attention has been paid to the inspection of tooth roots in the process of dental restoration, implant and orthodontic diagnosis and analysis. The existing technology lacks a method for precise tooth root extraction, 3D visualization and modeling testing, which cannot reduce the cost of related operations. Difficulty and risks, especially in complex operations that require high precision, where the relative position of the tooth root cannot be predicted, the operation cannot be performed

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