[唇腭裂患者不同截骨术后面中份牵张成骨的三维有限元分析]
[Three-dimensional finite element analysis for external midface distraction after different osteotomy in patients with cleft lip and palate].
作者信息
Hou Min, Shi Guang-Yu, Pu Li-Chen, Zhang Lan-Cheng, Zhang Xi-Zhong, Liu Chun-Ming
机构信息
Department of Orthognathic Surgery, Stomatological Hospital Affiliated to Nankai University, Tianjin Stomatological Hospital, Tianjin 300041, China.
出版信息
Zhonghua Zheng Xing Wai Ke Za Zhi. 2010 Jul;26(4):248-51.
OBJECTIVE
To study three-dimensional finite element analysis for external midface distraction after different osteotomy in patients with cleft lip and palate (CLP).
METHODS
Three-dimensional FEM models of Le Fort I, II and III osteotomy in CLP patients were established. External midface distraction were simulated. An anteriorly and inferiorly directed 900 g force was applied to bilateral maxillary arch in directions 30 degrees to the occlusal plane. Biomechanical changes for the maxillary complex were investigated by means of finite element analysis.
RESULTS
Maxillary complex was advanced after different osteotomy. Constriction of alveolar crest and palate occurred in Le Fort I osteotomy, but not in Le Fort II and III osteotomy. Clockwise rotation occurred in Le Fort I osteotomy complex. Counterclockwise rotation occurred in Le Fort II and III osteotomy complex.
CONCLUSIONS
Three-dimensional finite element research on external midface distraction could provide reference for the preoperative design.
目的
研究唇腭裂患者不同截骨术后面中部牵张成骨的三维有限元分析。
方法
建立唇腭裂患者Le Fort I、II和III型截骨的三维有限元模型。模拟面中部牵张成骨。在与咬合平面呈30度角的方向上，对双侧上颌牙弓施加向前下方向900 g的力。通过有限元分析研究上颌复合体的生物力学变化。
结果
不同截骨术后上颌复合体均向前移动。Le Fort I型截骨术后牙槽嵴和腭部出现缩窄，而Le Fort II型和III型截骨术后未出现。Le Fort I型截骨复合体发生顺时针旋转。Le Fort II型和III型截骨复合体发生逆时针旋转。
结论
面中部牵张成骨的三维有限元研究可为术前设计提供参考。
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