Development of a high accuracy analytical system for medical treatment of malfunction of mandibular movement

由于下颌关节能够向旋转和平移方向运动，所以人类的下颌骨能够产生各种各样的运动。为了正确诊断咬合功能障碍，需要观察准确的下颌运动。本研究旨在开发一种三维下颌显示系统，为医学诊断咬合功能障碍提供有用的生物力学信息。该显示系统成功地将测量误差降低到0。1 .优化摄像机的配置，选择合适的摄像机帧率。我们开发了一种利用牙齿石膏模的CT数据为每位患者制作精确的下颌模型的方法。演示了上下齿间的接触状态和干涉检测。通过分析咀嚼肌肌长随时间的变化，阐明了咀嚼肌在咀嚼过程中的协同作用。提出了一种从三种基本运动模式综合咀嚼运动的方法。该方法为下颌运动功能障碍提供了统一的诊断方法。

The human mandible produces variety of movements because the mandibular joints are able to move to both rotational and translational directions. To make a proper diagnosis of the malfunction of occlusion, it needs to observe exact mandibular movements. This study aims to develop a 3-D mandibular display system that provides useful biomechanical information for medical diagnosis of the malfunction of occlusion.1. The display system was successfully to decrease the measurement error within 0. 1mm optimizing allocation of video cameras and selecting a proper frame rate of the cameras.2. We developed a method to produce a precise mandibular model for each patient by use of the CT data of gypsum mold of teeth. Contact states and detection of interference between up and down teeth were demonstrated.3. It was clarified that masticatory muscles cooperatively worked in mastication by analyzing time change of muscular lengths of masticatory muscles.4. We proposed a method to synthesize chewing motion from three basic motion modes. The method provides a unified estimation for malfunction of mandibular movement.