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本研究利用青少年上颌后缩骨性Ⅲ类颅面骨的三维有限元模型对由于前牵引方向的改变而导致的生物力学变化进行了相关的分析，以期为临床提供实验力学依据。
In this study, the use of three-dimensional finite element model of adolescent maxillofacial Class Ⅲ craniofacial cortex to analyze the biomechanical changes caused by the change of the pre-traction direction in order to provide experimental mechanics basis for the clinical.