A computer-aided design method for establishing the occlusal relationship of teeth

Abstract

The invention provides a computer-aided design method for establishing the occlusal relationship of teeth. In a three-dimensional visualization environment, through intuitive images and objective quantitative indicators, it can assist doctors to establish a new occlusal relationship model on the computer, so as to better guide orthodontics and orthognathic surgery. The method of the present invention comprises the following steps: 1) collecting and reading the three-dimensional data model of the upper and lower jaw dentition; 2) selecting the corresponding point of the cusp on the three-dimensional data model of the dentition; 3) calculating the corresponding point vector of the cusp and the upper and lower jaw Point cloud distance, showing the corresponding vector map of the cusp and the 2D collision detection chromatogram; 4) Move the 3D data model until the upper and lower jaws are in a good occlusal correspondence; 5) Calculate the 3D collision model; 6) Compute the calculated 3D data Perform Boolean operations on the collision model and the three-dimensional data model of the upper and lower jaw dentition obtained in step 4), remove interference, and obtain a virtual occlusal model; 7) save and export the established virtual occlusal 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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