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

人类下颌骨产生各种运动，因为下颌关节能够向旋转和平移方向运动。为了正确诊断咬合障碍，需要准确观察下颌运动。本研究的目的是建立一个下颌骨三维显示系统，为临床诊断咬合功能障碍提供生物力学信息.该显示系统成功地将测量误差控制在0. 1mm优化摄像机配置，选择合适的摄像机帧率.我们开发了一种方法来产生一个精确的下颌骨模型，为每个病人使用的CT数据的石膏模型的牙齿。对上下齿的接触状态和干涉检测进行了研究.通过分析咀嚼肌肌长的时间变化，阐明咀嚼肌在咀嚼过程中的协同工作.提出了一种由三种基本运动模式合成咀嚼运动的方法。该方法为下颌运动功能障碍提供了一种统一的评估方法。

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.