Electronic determination of centres of rotation produced by orthodontic force systems.
Electronic determination of centres of rotation produced by orthodontic force systems.
复制标题
电子确定正畸力系统产生的旋转中心。
DOI：
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发表时间：
1990
影响因子：
2.6
通讯作者：
P. Gjessing
中科院分区：
文献类型：
--
作者：
E. Pedersen;K. Andersen;P. Gjessing
研制了一种用于测量二维齿面初始位移的低力应变片测量装置。模拟上颌中切牙的实验模型加载不同的已知和受控的力系统。由此产生的牙齿位移由旋转中心的位置和总牙齿移动的生成的旋转角来描述。研究了单个力、力矩以及产生不同力矩与力比的力-力矩组合的影响。根据这些结果，计算出平均根长的中切牙产生不同旋转中心的牙齿移动所需的力系。此外，该模型允许我们通过将结果与在类似模型上获得的分析和激光全息数据进行比较来测量测量设备的精度。一些初步的测量和结果，使用人体尸检材料。
A strain gauge measurement device with low force clip gauges, for measurement of initial tooth displacement in two dimensions has been developed. An experimental model simulating a maxillary central incisor is loaded with different known and controlled force systems. The resulting tooth displacements are described by the position of the centre of rotation and the generated angle of rotation for the total tooth movement. The effect of a single force, a moment, and force-moment combinations producing different moment to force ratios were studied. From these results the required force system needed to produce tooth movements with different centres of rotation for a central incisor of average root length are calculated. Furthermore, the model allows us to measure the accuracy of the measuring device by comparing results to analytical and laser holographic data, obtained on similar models. Some preliminary measurements and results, using human autopsy material are presented.