Method of reconstructing dentition through dental CT (Computed Tomography) image and three-dimensional scanning data

Abstract

The invention provides a method of reconstructing a dentition through a dental CT (Computed Tomography) image and three-dimensional scanning data. The method includes the steps of: preprocessing the CT image, and removing soft-tissue pixels; using an image segmentation method to obtain all individual tooth contours; using a surface drawing method to obtain a dentition model of the CT image; and establishing a segmentation surface to extract all dental crown models of the CT image; obtaining a three-dimensional scanning model of a dental jaw, and obtaining independent dental crown models afterprocessing; registering the dental crown models of the CT image and the dental crown models of the scanning data; and carrying out fusion and reconstruction on dental root models of the CT image and the dental crown models of the scanning data to effectively construct a three-dimensional model of the dentition with dental crown information with high precision. The method solves the existing technical problem that voxel resolution of patient complete-dental-jaw three-dimensional-models extracted through CT images is low, and can be used for formulation assisting of invisible-orthodontics schemes of physicians, assisted design of orthoses and further biomechanical analysis.

Description

technical field [0001] The invention relates to the technical field of orthodontics, in particular to a method for reconstructing dentition. technical background [0002] In the field of orthodontics, in the traditional treatment process, the physical model of teeth and jaws is the main basis for doctors to diagnose malformation, plan treatment plans and design appliances, but the physical model of teeth and jaws only includes the crown part, and lacks the root and jaw. The three-dimensional information of bone cannot determine the tooth axis of impacted teeth and impacted teeth with only partial crown eruption or no crown eruption. With the wide application of computed tomography (CT) technology in clinical orthodontic treatment, the complete three-dimensional model of patients’ teeth and jaws can be extracted from CT images, which can accurately reflect the shape, size, arrangement of teeth and upper The occlusal relationship of the mandibular teeth. However, the voxel r...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the existing technical problem of low voxel resolution of the patient's complete three-dimensional model extracted from CT images, the present invention provides a method for reconstructing dentition through dental CT images and three-dimensional scanning data, combining CT technology and three-dimensional scanning data , constructed a three-dimensional model of the dentition with high-precision crown information

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