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Abstract：
Malocclusion has been seriously endangering human oral function. The most effective and mature therapy is orthodontic treatment. But the relationship between the shape of the T-loop and the orthodontic force is unclear, and the precise mathematical model has not been established. In this article, the dynamic orthodontic force prediction model of the T-loop was established by analyzing the treatment process of the T-loop. The model was based on the dynamic resistance model of waxy dental jaw, the theory of beam deformation, and the deformation characteristics of the T-loop. In the experimental process, 11 kinds of orthodontic archwires were used as experimental samples, including 2 kinds of common archwire materials, 7 kinds of cross-sectional sizes, and 10 kinds of clearance distances. The T-loop was put into the extraction space and immersed in 75°C constant temperature water for 2 min. And the experimental data were measured and collected by the dynamic force measuring device. The experimental results show that the cross-sectional size and the clearance distance are positively correlated with the orthodontic force. The influence of the clearance distance on the orthodontic force is greater than that of the cross-section size. The deviation rates between the experimental values of orthodontic force and the theoretical values are between 1.10% and 9.09%, which verifies the accuracy of the dynamic orthodontic force prediction model. The model can predict the orthodontic force, improve the treatment effect, shorten the treatment cycle, and provide reference and guidance for orthodontists to carry out orthodontic treatment safely and effectively.
摘要：
错牙合已严重危害人类口腔功能。最有效和最成熟的治疗方法是正畸治疗。但T型环的形状与正畸力的关系尚不清楚,精确的数学模型尚未建立。在这篇文章中,通过分析T环的治疗过程,建立了T环正畸力动态预测模型。该模型基于蜡质牙颌的动态阻力模型，梁变形理论，以及T型环的变形特性。在实验过程中,以11种正畸弓丝为实验样本,包括2种常见的弓丝材料，7种横截面尺寸，和10种间隙距离。将T-回路放入提取空间中并浸入75°C恒温水中2分钟。并利用动态测力装置对实验数据进行测量和采集。实验结果表明,正畸力的大小和间隙距离与正畸力呈正相关。间隙距离对正畸力的影响大于横截面尺寸的影响。正畸力实验值与理论值的偏差率在1.10%~9.09%之间,从而验证了动态正畸力预测模型的准确性。该模型可以预测正畸力，提高治疗效果,缩短治疗周期,为正畸医生安全有效地开展正畸治疗提供参考和指导。
