论文部分内容阅读
目的 模拟和观察不同方向的颏兜力施加于下颌骨时颞下颌关节受力状况的变化。方法 在对颞下颌关节及下颌骨进行磁共振扫描和三维重建的基础上建立颞下颌关节的三维有限元模型。在颏点处施加 2 .94 N的颏兜力 ,力的方向在与 Frankfort平面成 0°- 90°角的范围内变化 ,观察关节区应力的变化情况。结果 当颏兜力的方向与 Frankfort平面的夹角由小到大变化时 ,关节各组成部分的应力值均发生相应的由大到小的变化 ,力的分布趋于均匀。结论 颏兜力的角度较大时有利于关节的组织健康 ,方向较接近水平的颏兜力有利于发挥颏兜抑制下颌生长的作用。
Objective To simulate and observe the changes of stress status of temporomandibular joint (TMJ) under different directions of chin and poncho force applied to the mandible. Methods Three-dimensional finite element model of temporomandibular joint was established on the basis of magnetic resonance scanning and three-dimensional reconstruction of temporomandibular joint and mandible. A chin strap force of 2.94 N was applied to the chin point, and the direction of the force was changed within the range of 0 ° to 90 ° from the Frankfort plane to observe the change of stress in the joint region. Results When the angle between the direction of chin and glove force and the plane of Frankfort changed from small to large, the stress values of all the components of joints changed correspondingly from small to large, and the force distribution tended to be uniform. Conclusions The greater chin-glove angle is beneficial to the health of joints and the closer chin-glove force is beneficial to the growth of mandibular growth inhibition.