Okamoto K, Okamoto Y, Shinoda K, Tamura Y
Department of Pediatric Dentistry, Asahi University School of Dentistry.
Shoni Shikagaku Zasshi. 1990;28(4):975-83.
The present study was designed to discuss the reproducibility and the clinical usage of the T-Scan system in children. A plastic model of a normal permanent dentition was used for the study. The model was pressed on the sensor of the T-Scan system in maximum intercuspation under various assigned pressures (10, 20, 30, 40 and 50 kg) which were controlled by a press machine (Auto Graph AG-5000C). The pressings were made under following conditions, such as 1) the sensor handle was fixed, 2) the sensor handle was free and 3) the sensor handle was free but the maxilla arch form was marked on the sensor by the silicone impressional material. The total number of tooth contacts were counted and sagittal and the vertical distance from midline to the tooth contacts were measured. The results obtained in the present study are summarized as follows: 1) The number of tooth contacts became stable, when the pressing sensor was exercised several times. 2) The more pressure raised on the sensor, the more the number of tooth contacts increased, and the more the coefficient of variation tended to decline. 3) The arch model displayed on the T-Scan system was not exactly represented in the actual dental arch. 4) Due to the marking by silicone impressional material on the sensor, the reproducibility of the T-Scan system was further improved.
本研究旨在探讨T-Scan系统在儿童中的可重复性及临床应用。研究使用了正常恒牙列的塑料模型。该模型在由压力机（Autograph AG-5000C）控制的各种指定压力（10、20、30、40和50千克）下，以最大牙尖交错位压在T-Scan系统的传感器上。按压在以下条件下进行，例如：1）传感器手柄固定；2）传感器手柄自由；3）传感器手柄自由，但上颌牙弓形态通过硅橡胶印模材料标记在传感器上。统计牙齿接触总数，并测量从中线到牙齿接触点的矢状向和垂直距离。本研究获得的结果总结如下：1）当按压传感器多次时，牙齿接触数变得稳定。2）传感器上施加的压力越大，牙齿接触数增加得越多，变异系数趋于下降得越多。3）T-Scan系统上显示的牙弓模型与实际牙弓并不完全一致。4）由于传感器上有硅橡胶印模材料的标记，T-Scan系统的可重复性进一步提高。
