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[Development of a computerized three-dimension system for displaying and analyzing mandibular helical axis pathways].

Li Chen, Hao Zhang, Hailan Feng

    Sheng Wu Yi Xue Gong Cheng Xue Za Zhi = Journal of Biomedical Engineering = Shengwu Yixue Gongchengxue Zazhi
    |April 15, 2015
    PubMed
    Summary

    This study presents a new 3D system for analyzing mandibular helical axis pathways. The system accurately displays and quantifies complex jaw movements, aiding in the study of mandibular kinematics.

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    Area of Science:

    • Biomedical Engineering
    • Biomechanics
    • Computational Anatomy

    Background:

    • Understanding complex mandibular movements is crucial for diagnosing and treating temporomandibular joint disorders.
    • Existing methods for analyzing jaw motion may lack precision or comprehensive 3D visualization capabilities.

    Purpose of the Study:

    • To develop and validate a computerized three-dimensional (3D) system for displaying and analyzing mandibular helical axis pathways.
    • To enable comprehensive quantification of mandibular kinematics using detailed helical axis parameters.

    Main Methods:

    • Utilized a six-degrees-of-freedom ultrasonic jaw movement recording device for data acquisition.
    • Reconstructed and segmented 3D digital models of the midface and mandible from CT scans.
    • Developed a system using Visualization ToolKit and Open Scene Graphics Library to process motion data, calculate transformation matrices, and display helical axis pathways via an eigenvalues method.

    Main Results:

    • Successfully developed a 3D system capable of simulating mandibular movements and calculating helical axis pathways.
    • Enabled the calculation and display of key helical axis parameters including rotation, translation, spatial orientation, position, and distance relative to reference points.
    • Demonstrated the system's ability to comprehensively describe entire mandibular movements.

    Conclusions:

    • The developed computerized 3D system provides a valuable tool for the detailed analysis of mandibular helical axis pathways.
    • This system has the potential to significantly contribute to research and clinical understanding of mandibular kinematics and related disorders.