A SYSTEM TO MONITOR MANDIBULAR MOVEMENTS IN REAL TIME

将开发一种系统来监测人类下颌的运动 高效、准确。该系统将由一台个人计算机组成 基于PC的数据采集和分析单元，一个无拘无束的口腔外 线束上连接了一组发光二极管(LED)，以及 两个固态探测器，用于跟踪太空中的LED。严谨 将开发摄影测量软件来计算LED的位置 三维空间，并计算任何所需点的运动包络 在下颌骨上，包括髁突中心。 有三个LED安装在线束的下颌部分和三个 安装在颅部，相对位置和方向 下颌骨相对于头盖骨的位置可以按速率确定 每秒超过30次。该系统将利用最近的 实现如此高数据速率的固态探测器技术的进展 有可能以适中的成本。它将不受 较老的机械和电磁系统。 这样的系统将立即在几个牙科领域得到应用 练习一下。它可以用来测量物理上的变化 牙列发育过程中上颌与下颌骨的关系 说话和咀嚼。因为一份详细的数学记录 功能动作将被存储，该系统可用于确定 牙齿修复后的功能变化，TMJ功能障碍的治疗， 正颌外科，或正畸治疗。

A system will be developed to monitor the movements of the human mandible efficiently and accurately. The system will consist of a Personal Computer (PC) based data acquisition and analysis unit, a non-restraining extra-oral harness to which is attached a set of Light Emitting Diodes (LED's), and two solid-state detectors to track the LED's in space. Rigorous photogrammetric software will be developed to compute the LED positions in three dimensions, and compute the envelopes of motion of any desired points on the mandible, including the condyle centers. With three LED's mounted on the mandibular portion of the harness and three mounted on the cranial portion, the relative position and orientation of the mandible with respect to the cranium can be determined at rates exceeding 30 times per second. The system will take advantage of recent advances in solid-state detector technology to make such high data rates possible at moderate cost. It will be free of the constraints posed by older mechanical and electromagnetic systems. Such a system would find immediate application in several areas of dental practice. It could be used to measure the changes in physical relationships between the upper and lower jaws during the processes of speech and mastication. Because a detailed mathematical record of the functional movements will be stored, the system could be used to determine functional change after dental restoration, treatment of TMJ disfunction, orthognathic surgery, or orthodontic treatment.