Computer interaction type method for segmenting single tooth crown from three-dimensional jaw model

Abstract

The invention discloses a computer interaction type method for segmenting a single tooth crown from a three-dimensional jaw model. The method includes the steps: reading and visually displaying the three-dimensional jaw grid model; detecting anatomic characteristic points and an occlusion plane of upper teeth of a jaw in the three-dimensional jaw grid model; assigning constraint points of harmonic fields of the three-dimensional jaw grid model; calculating the harmonic fields according to constraint conditions to obtain a tooth crown segmenting border line; performing grid cutting according to the obtained tooth crown segmenting border line to obtain a tooth crown model. By the method, a tooth segmenting border can be accurately obtained, the method is simple to use, and a user interactively determines two border points on a visual view of the jaw model for a single tooth to be separated, so that the tooth crown grid model of the tooth can be accurately obtained. The method has important significance for dental orthodontics, virtual jaw surgery simulation and the like.

Description

technical field [0001] The invention relates to a computer-interactive method for segmenting a single crown from a three-dimensional model of a jaw. Background technique [0002] With the development of 3D acquisition technology, 3D models of teeth and jaws are currently widely used in related fields of dentistry, such as stomatology, forensic science, anthropology and archaeology. Segmentation and classification of dental models are an indispensable part of dental virtual reality applications such as treatment planning and virtual surgery. [0003] The current automatic mesh segmentation method for the crown is difficult to obtain an accurate model, and its robustness is not strong. Although the interactive segmentation method can use human prior knowledge to fully reflect the user's operation intention, the current method generally requires the user to specify several boundary points along the expected crown segmentation line, which is a cumbersome and time-consuming proc...

AI Technical Summary

Problems solved by technology

[0003] The current automatic mesh segmentation method for the crown is difficult to obtain an accurate model, and the robustness is not strong

Although the interactive segmentation method can use human prior knowledge to fully reflect the user's operation intention, the current method generally requires the user to specify several boundary points along the expected crown segmentation line, which is a cumbersome and time-consuming process. Obviously not in line with the intelligent logo

The previous methods either required a lot of manual interaction to determine the boundary, which was time-consuming and laborious, or could not obtain accurate crown segmentation results and poor robustness.

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