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  • Title: [Three-dimensional finite element analysis for external midface distraction after different osteotomy in patients with cleft lip and palate].
    Author: Hou M, Shi GY, Pu LC, Zhang LC, Zhang XZ, Liu CM.
    Journal: Zhonghua Zheng Xing Wai Ke Za Zhi; 2010 Jul; 26(4):248-51. PubMed ID: 21046767.
    Abstract:
    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.
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