尖牙反牙合矫治人字形和 T 形曲组合正畸弓丝矫治力建模
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TP242 TH789

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黑龙江省自然科学基金项目(LH2021E081)、中国博士后基金特别资助项目(2018T110313)资助


Modeling of orthodontic force of herringbone and T-shaped loop combined orthodontic archwire for the treatment of canine crossbite
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    摘要:

    固定矫治技术是治疗牙齿反 最为有效的矫治手段,主要通过正畸弓丝释放的矫治力来达到反 矫治中的矫治空间预 留、反 牙齿回收的目的。 在牙齿反 畸形中,尖牙反 是最为常见的牙齿反 畸形,常使用人字形和 T 形组合曲关闭上颌牙 列间隙。 本文旨在正畸治疗前量化人字形和 T 形组合曲释放矫治力的情况,为正畸医师提供尖牙反 矫治的理论参考。 分析 人字形和 T 形组合曲的形变过程,将其形变过程分为弹性形变和弹塑性形变两类,并对两种形变下的矫治力微分方程进行了构 建,将其释放的矫治力分为闭隙矫治力和倾覆矫治力两种,完成了人字形和 T 形组合曲理论模型的建立,其次对有限元仿真值 与理论值的误差率进行计算,得到闭隙矫治力仿真值与理论值的误差率在 0. 43% ~ 8. 33% 之间,倾覆矫治力的仿真值与理论值 的误差率在 2. 13% ~ 9. 76% 之间,搭建实验测量平台得到了闭隙矫治力实验值与理论值误差率为 0% ~ 9. 30% 、倾覆矫治力实验 值与理论值的误差率为 0% ~ 9. 76% ,实验测量数据与理论值具有相同的非线性变化趋势,验证了人字形和 T 形组合曲理论预 测模型的正确性,该模型能帮助医师在治疗前对正畸力进行详细的定量分析,从而为个性化治疗方案的制定提供依据,更好地 满足患者需求。

    Abstract:

    Fixed orthodontic technique is the most effective method for the treatment of canine crossbite. The purpose of space reservation and tooth retraction in crossbite treatment is mainly achieved through the orthodontic force released by the orthodontic archwire. Among the tooth crossbite, the canine crossbite is the most common deformities of teeth. The combination of herringbone and T-shaped loop is often used to close the maxillary dental space. This article aims to quantify the release of orthodontic force by herringbone and T-shaped combination before orthodontic treatment. It can provide a theoretical reference for orthodontists in the treatment of crossbite. The deformation process of herringbone and T-shaped composite curve is analyzed, and the deformation process is divided into elastic deformation and elastoplastic deformation. The differential equations of the orthodontic force under the two kinds of deformation are established, and the released orthodontic force is divided into two kinds, including retraction force and overturning force. The theoretical model of herringbone and T-shaped combined loop is established. Secondly, the error rate of the finite element simulation data and the theoretical value are calculated, and the error rate between the simulated and theoretical values of the retraction correction force is 0. 43% ~ 8. 33% , and the error rate between the simulated and theoretical values of the overturning correction force is 2. 13% ~ 9. 76% . The experimental measurement platform is established. The error rate between the experimental and theoretical values of the retraction force is 0% ~ 9. 30% , and the error rate between the experimental and theoretical values of the overturning force is 0% ~ 9. 76% . The experimental measured data showed the same nonlinear variation trend with the theoretical values, which verified the correctness of the theoretical prediction model of the herringbone and T-shaped combination loop. This model can help physicians to conduct a detailed quantitative analysis of orthodontic force before treatment to provide a basis for the formulation of personalized treatment plans and better meet the needs of patients.

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姜金刚,李长鹏,李风潇,孙健鹏,张永德.尖牙反牙合矫治人字形和 T 形曲组合正畸弓丝矫治力建模[J].仪器仪表学报,2024,45(7):189-199

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  • 在线发布日期: 2024-10-24
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