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首页> 外文期刊>Journal of Biomechanics >An analysis of the measurement principle of smart brackets for 3D force and moment monitoring in orthodontics.
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An analysis of the measurement principle of smart brackets for 3D force and moment monitoring in orthodontics.

机译：正畸学中用于3D力和力矩监测的智能支架的测量原理分析。

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Measuring the three-dimensional (3D) force-moment (F/M) systems applied for correcting tooth malposition is highly desirable for accurate spatial control of tooth movement and for reducing traumatic side effects such as irreversible root resorption. To date, suitable tools for monitoring the applied F/M system during therapy are lacking. We have previously introduced a true-scale orthodontic bracket with an integrated microelectronic stress sensor system for 3D F/M measurements on individual teeth with a perspective for clinical application. The underlying theoretical concept assumes a linear correlation between externally applied F/M systems and mechanical stresses induced within the smart bracket. However, in combined applications of F/M components the actual wire-bracket contacts may differ from those caused by separate applications of corresponding individual F/M components, thus violating the principle of linear superposition of mechanical stresses. This study systematically evaluates this aspect using finite element (FE) simulations and measurements with a real smart bracket. The FE analysis indicated that variability in the wire-bracket contacts is a major source for measurement errors. By taking the critical F/M combinations into account in the calibration of the real smart bracket, we were able to reduce the mean measurement error in five of the six F/M components to values <0.12 N and <0.04 N cm. Bucco-lingually directed forces still showed mean errors up to 0.21 N. Improving the force measurement accuracy and integrating components for telemetric energy and data transfer are the next steps towards clinical application of intelligent orthodontic appliances based on smart brackets.
机译：为了精确地控制牙齿移动并减少创伤性副作用（例如不可逆的牙根吸收），非常需要测量用于纠正牙齿位置不正的三维（3D）力矩（F / M）系统。迄今为止，缺乏用于在治疗期间监视所应用的F / M系统的合适工具。我们之前已经推出了具有集成微电子应力传感器系统的真比例正畸托槽，可对单个牙齿进行3D F / M测量，并具有临床应用前景。基本的理论概念假设外部应用的F / M系统与智能支架内引起的机械应力之间存在线性关系。但是，在F / M组件的组合应用中，实际的线架触点可能与相应的单个F / M组件的单独应用所引起的引线支架触点不同，从而违反了机械应力线性叠加的原理。这项研究使用有限元（FE）模拟和带有真实智能支架的测量系统地评估了这一方面。有限元分析表明，线架触点的可变性是导致测量误差的主要来源。通过在实际智能支架的校准中考虑关键的F / M组合，我们能够将六个F / M组件中的五个组件的平均测量误差减小到<0.12 N和<0.04 N cm。含舌舌的力仍然显示出高达0.21 N的平均误差。提高力的测量精度以及集成遥测能量和数据传输的组件是基于智能支架的智能正畸矫治器临床应用的下一步。

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