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Updated: Jun 7, 2026
Finite Element Analysis Model for Assessing Expansion Patterns from Surgically Assisted Rapid Palatal Expansion
Published on: October 20, 2023
[Three-dimensional finite element analysis for external midface distraction after different osteotomy in patients
Min Hou1, Guang-Yu Shi, Li-Chen Pu
1Department of Orthognathic Surgery, Stomatological Hospital Affiliated to Nankai University, Tianjin Stomatological Hospital, Tianjin 300041, China. houmin8181@sina.com
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.
