System and method for capturing and visualizing mandibular three-dimensional motion

Abstract

The invention discloses a system for capturing and visualizing mandibular three-dimensional motion. The system comprises a mandibular motion tracking device for designing and printing through a three-dimensional CT (Computed Tomography) model, at least two infrared cameras, and a host computer for analyzing shooting record data, wherein the mandibular motion tracking device comprises a rear end fixing device, a medium connecting rod, and three marking rods, wherein the three marking rods are arranged at the front end and are not co-planar; one end of each of the marking rods is connected to the medium connecting rod and while the other end of each of the marking rods is provided with a marker; the rear end fixing device is used for designing and printing through the three-dimensional CT model according to the external physical characteristics of lower teeth; the markers expose from the mouth and move together with the mandible; the host computer is used for recovering the overall motion of the mandible of a tested subject so as to determine whether the mandible motion and occlusal contacts are normal. The invention also provides a method for capturing and visualizing the mandibular three-dimensional motion. According to the technical scheme, the system and method have the advantages of low cost, high testing accuracy and the like, and is convenient to operate.

Description

technical field [0001] The invention relates to a medical detection technology, in particular to a mandibular three-dimensional motion capture and visualization system and method. Background technique [0002] Human mandibular movement is a complex three-dimensional movement involving teeth, masticatory muscles and temporomandibular joints. Its movement pattern is closely related to the health of the oral and jaw system. The characteristics of mandibular movement can be used to analyze and understand chewing, swallowing and language. And other functions, for the analysis and diagnosis of temporomandibular joint lesions and judgment of curative effect. Pathophysiological factors such as mandibular incisor trajectory, molar trajectory, bilateral condyle trajectory and the myoelectricity of each masticatory muscle in various movements are the basis for formulating a rehabilitation program for occlusal disease, and they are also the basis for the design of capture motion markers...

AI Technical Summary

Problems solved by technology

However, the overlap and projection angle of X-ray images cannot quantitatively analyze the movement of certain points on the condyle

In 1921, B. McCollum developed a mechanical mandibular movement recorder, which recorded the movement of the mandible through the splint, facebow and tracing pen board. After many improvements, it has become the main research method of current clinical research, but it is still too cumbersome. and complex, not conducive to promotion

In the 1980s, the American Grbh company successfully developed the condyle motion tracer, which combined the classic condyle motion trace with the computer, but it still has its limitations, because the outer side of the condyle is covered with a layer of soft tissue, its motion cannot be observed directly

However, these devices have complex structures, high prices, and inconvenient operation, and the investment cost in equipment maintenance and material consumption is too high

[0004] However, my country's existing technical solution "Mandibular Movement Trajectory Recording System" only uses a marker to track the movement of the mandible, so the movement information it records can only represent the movement state of the mandible, that is, the entire jaw, and cannot really test the inside of the mandible. That is, the three-dimensional motion information of the mandible

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