Data base construction of head posture and tongue contact pattern at openbite patiants by means of wireless telemeter system

舌位错位是导致错(牙合)畸形的可能原因之一，但在日常活动中长时间测量其位置和运动尚无理想的测量系统。为了在自然条件下，利用牙腭弓电位仪和倾斜仪长时间测量舌位和头部姿势，研制了一套无线遥测系统。受试者包括正常咬合的成年女性(N组)和下颌前张合的女性前牙合患者(O组)。利用该系统对两组受试者在阅读和行走过程中的舌头接触位置和头部姿势进行测量。对两组数据进行比较，结果如下：1.O组舌面接触面积大于N组。两组患者在矢状面和额面的平均头部倾斜度差异无统计学意义。头部屈曲程度越大，舌头接触面积越大。复发病例术后舌面接触面积较稳定病例大。该系统适用于长时间测量舌位和头部姿势，不干扰受试者的日常活动。利用该系统可以显示正常牙合和前张牙合下颌前突患者舌位与头位的关系。

Malposition of the tongue is recognized as a possible cause of malocclusions, yet there has been no optimal system to measure its position and movement for long hours during daily activities.A wireless telemeter system was developed in order to measure the tongue position and head posture for long hours in natural condition by using Electro Dento-Palatography and Inclination meters.The subjects were consisted of female adults with Normal occlusion (N-group) and the female patients with mandibular prognathism with anterior Openbite (O-group). The contact position of tongue and the head posture were measured in both groups during reading and walking by using of this system. Data obtained from both groups were compared and the results were as follows :1. The contact area of tongue of the O-group was larger than that of the N-group.2. Average head inclinations in sagittal and frontal planes were not significantly different in two groups.3. Great degree of head flexion corresponded to a larger contact area of the tongue.4. Relapsed case showed larger contact area of tongue compared with stable case after surgery.5. This system was applicable to measure tongue position and head posture for long hours without interfering with the subjects' daily activities. Using this system, it was possible to demonstrate relationship between tongue position and head posture in normal occlusion and mandibular prognathism with anterior openbite.