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应用激光全息干涉计量术的二次曝光技术,对一具恒牙列早期女性尸体颅骨在模拟临床牵引上颌矫治的情况下加力300g向前牵引,测定上颌复合体受与(牙合)平面呈不同角度前牵引力时的微小三维位移场,为临床前牵引上颌提供生物力学依据。实验结果表明,上颌牙列受(牙合)平面方向及(牙合)平面上15°前牵引力时,上颌复合体逆时针转,上颌向前上移位,受(牙合)平面下15°前牵引力时,上颌复合体主要呈向前下的运动趋势,颌骨前份的上下之间发生挤压弯曲。牵引力方向不同,颅面骨的位移及旋转中心亦异。大小相同,方向不同的牵引力可以引起不同程度的颌面位移。
The application of laser holographic interferometry double exposure technology, a permanent dentition early female cadaveric calf in the simulated clinical traction maxillary orthopedic force 300g forward traction, measured maxillary complex by (occlusion) plane was The micro-three-dimensional displacement field at different angles of pre-traction provides a biomechanical basis for pre-clinical traction of the maxillary. The experimental results show that when the maxillary dentition is in the direction of (occlusal) plane and the traction force of 15 ° on the occlusal plane, the maxillary complex rotates counterclockwise and the maxilla moves upwards. Before the traction, the maxillary complex was mainly downward movement trend, the upper part of the mandible before squeezing between the bending. Different traction direction, the displacement of the craniofacial bone and the rotation center is also different. The same size, different traction can cause different degrees of maxillofacial displacement.