Computer-aided design method for building tooth occluding relation

Abstract

The invention provides a computer-aided design method for building a tooth occluding relation. In a three-dimensional visual environment, a doctor is assisted to build a new occluding relation model on a computer through an intuitive image and an objective quantitative index, so that orthodontic and orthognathous surgical treatment are better guided. The method comprises the following steps: (1) acquiring and reading a three-dimensional data models of upper and lower jaw dentitions; (2) selecting canine fossa corresponding points from the three-dimensional data model of the dentitions; (3) calculating canine fossa corresponding point vectors and a point cloud distance between upper and lower jaws, and displaying a canine fossa corresponding vector diagram and a two-dimensional collision detection chromatogram; (4) moving the three-dimensional data model till the upper and lower jaws are under a good occluding corresponding relation; (5) calculating a three-dimensional collision model; (6) performing Boolean operation on the calculated three-dimensional collision model and the three-dimensional data model of the upper and lower jaw dentitions obtained in the step (4), and removing interference to obtain a virtual occluding model; and (7) saving the built virtual occluding model, and exporting the saved virtual occluding model.

Description

technical field [0001] The invention relates to the technical fields of computer-aided design and visual analysis, in particular to a computer-aided design method for establishing the occlusal relationship of teeth. Background technique [0002] Establishing a good and stable occlusal relationship is one of the important goals of oral and maxillofacial surgery. Therefore, determining a good terminal occlusal relationship during treatment is an important part of surgical design. The traditional method is to manually adjust the plaster model of the patient's teeth to determine the final occlusal relationship. Usually, the following method is used to determine the final occlusal relationship: after the plaster model is matched to the occlusal relationship, the doctor digitizes the occlusal relationship through laser scanning, and then through complex Only through the registration process can the occlusal relationship and the fusion of bone blocks be realized. The disadvantage...

AI Technical Summary

Problems solved by technology

The disadvantages of this method include: 1) time-consuming and labor-intensive; 2) special equipment support is required, such as laser scanners; 3) the doctor cannot see the bone information when determining the occlusal relationship, which affects the judgment of the terminal occlusal relationship

However, the addition of collision detection results in extended calculation time and poor real-time performance, which is unacceptable to the operator (doctor)

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