三軸コイルを用いたチェアサイド用6自由度顎運動測定器の開発と応用

Jaw movement data include a lot of useful information for diagnosing stomatognathic functions. To clarify the relationship between occlusion and jaw movement, several types of jaw tracking devices that have capability to record jaw movement in six-degree-of-freedom have been developed in our department. The purposes of this study were to develop a new jaw tracking device which has high usability and high accuracy, and to examine data acquisition ability of the device. We utilized a pair of triaxial coils for improving performance of the device. Both usability and accuracy are essential to develop a stomatognathic function database with accurate jaw movement data. When we bring it to completion, we will be able to provide useful diagnostic criteria for making an examination of patients who have jaw movement-related problems. Forty-five asymptomatic (23 males and 22 females) and 35 symptomatic (17 males and 18 females, with temporomandibular disorders) adult volunteers were participated in this study after they underwent stomatognathic functional examinations. Jaw movement data were recorded with the newly developed device and analyzed quantitatively and qualitatively. Thirty-six jaw movement parameters were used in the quantitative analysis. Values of mean and standard deviation of jaw movement parameters were computed from control group (asymptomatic volunteers, 23 male and 22 female), and they were considered as reference values. Additionally, one well-experienced dentist evaluated jaw movement pathways of all subject on width, smoothness, symmetry and reproducibility of incisal trajectories qualitatively. The results of this study were as follows: 1. The new jaw-tracking device was developed with utilizing a pair of triaxial coils. This device showed ability of jaw movement recording with high accuracy. 2. Jaw movements of 80 subjects were measured with the newly developed device only in two and half months. 3. Quantitative and qualitative evaluations of jaw movement could be one of effective methods to diagnose temporomandibular disorders. 4. The stomatognathic function database will provide diagnostic and evaluating criteria for jaw movement to diagnose jaw movement-related problems and to evaluate the clinical outcome of treatments.

公開日:2010年1月24日で登録したコンテンツは、国立情報学研究所において電子化したものです。