Kinuta Soichiro, Wakabayashi Kazumichi, Sohmura Taiji, Kojima Tetsuya, Mizumori Takahiro, Nakamura Takashi, Takahashi Junzo, Yatani Hirofumi
Division of Oromaxillofacial Regeneration, Course for Integrated Oral Sciences and Stomatology, Osaka University Graduate School of Dentistry, Suita, Japan.
Dent Mater J. 2005 Dec;24(4):661-6. doi: 10.4012/dmj.24.661.
The aim of this study was to confirm the precision of our simple and inexpensive jaw tracking system which combined the use of a digital camcorder and a motion capture software developed lately. A marker was attached to the mandibular incisors of the subject, and a mirror was assembled beside the subject's face to detect antero-posterior movement during chewing. Jaw movements, including the mirror images, were recorded by a digital camcorder. The movements were traced by a motion capture software and translated into 3D data using original handmade software. To confirm the beneficial performance of our system in measuring masticatory movement, the masticatory movements of five subjects were simultaneously recorded together with a conventional jaw tracking system. Trajectories obtained from both systems were similar, and the correlation coefficient values by simple regression analysis between both trajectories were 0.9 or higher for all subjects. It was confirmed that our system could record masticatory movement with sufficient precision equivalent to that of a conventional jaw tracking system.
本研究的目的是证实我们简单且低成本的下颌追踪系统的精确性，该系统结合了数码摄像机的使用和近期开发的动作捕捉软件。在受试者的下颌切牙上附着一个标记，并在受试者面部旁边安装一面镜子，以检测咀嚼过程中的前后运动。包括镜像在内的下颌运动由数码摄像机记录。这些运动由动作捕捉软件追踪，并使用原始的自制软件转换为三维数据。为了证实我们的系统在测量咀嚼运动方面的良好性能，同时使用传统下颌追踪系统记录了五名受试者的咀嚼运动。两个系统获得的轨迹相似，所有受试者两条轨迹之间通过简单回归分析得到的相关系数值均为0.9或更高。证实了我们的系统能够以与传统下颌追踪系统相当的足够精度记录咀嚼运动。
