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首页> 外文期刊>Journal of Biomechanics >Measuring system for in vivo recording of force systems in orthodontic treatment-concept and analysis of accuracy.
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Measuring system for in vivo recording of force systems in orthodontic treatment-concept and analysis of accuracy.

机译：用于在正畸治疗概念中体内记录力系统的测量系统和准确性分析。

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The aim of our developments is three-dimensional in vivo recording of those orthodontic force systems inducing tooth movements during treatment with fixed appliances. The concept presented here is the first to permit the forces and torques of these statically multiply undetermined systems to be recorded in vivo. For this purpose the force systems transmitted to the teeth from the archwire are isolated from the respective tooth by means of divisible special-design brackets and introduced into a 3D force torque sensor via a gripping appliance. The sensor is fixed with a purpose-developed device relative to the patient's dental arch. The patient's head is positioned relative to the system by means of a bite fork as well as a forehead and chin support. Electrical measurement of the mechanical quantities is carried out by a six-axis force torque sensor with semiconductor strain gauge elements, an electronical evaluator and a mobile measuring computer (PC). Extensive calibration of the sensor system has shown that the measuring uncertainty of the electrical measuring is less than 2%. Precise spatial fixing of bracket slot and archwire in the therapeutic position is crucial to the measuring accuracy of the system, as even minimum displacements affect the force system to be measured. Movements of the measuring system up to 0.04 mm result from a therapeutic force of 1.5 N. The results of extensive in vitro studies have already demonstrated that the system developed by us is suitable for the specified in vivo measuring function.
机译：我们开发的目的是对那些在使用固定矫治器治疗期间引起牙齿移动的正畸力系统进行三维体内记录。这里介绍的概念是第一个允许在体内记录这些静态不确定的系统的力和扭矩的方法。为此，通过可分割的特殊设计支架将从弓丝传递到牙齿的力系统与相应的牙齿隔离，并通过抓取装置将其引入3D力扭矩传感器。传感器通过专用于患者牙弓的专用设备固定。通过咬叉以及前额和下巴支撑，患者的头部相对于系统定位。机械量的电气测量是通过带有半导体应变仪元件的六轴力扭矩传感器，电子评估器和移动测量计算机（PC）进行的。传感器系统的广泛校准表明，电气测量的测量不确定度小于2％。支架槽和弓丝在治疗位置的精确空间固定对于系统的测量精度至关重要，因为即使最小的位移也会影响要测量的力系统。 1.5 N的治疗力可将测量系统移动至0.04 mm。广泛的体外研究结果表明，我们开发的系统适用于指定的体内测量功能。

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