Biomechanical Study of Different Design Schemes for Mandibular Angle Osteotomy Line
10.16156/j.1004-7220.2025.04.012
- VernacularTitle:不同下颌角截骨线设计方案的生物力学研究
- Author:
Man CHEN
1
;
Yunzhang CHENG
;
Yu QIAN
;
Yichi ZHANG
;
Li LIN
;
Tianyi ZHANG
;
Gang CHAI
Author Information
1. 上海理工大学健康科学与工程学院,上海 200093;上海市介入医疗器械工程研究中心,上海 200093
- Publication Type:Journal Article
- Keywords:
mandible;
centric occlusion;
cortical/cancellous bone assignment;
gray value assignment;
osteotomy line;
finite element analysis
- From:
Journal of Medical Biomechanics
2025;40(4):878-885
- CountryChina
- Language:Chinese
-
Abstract:
Objective To conduct preoperative simulations of three different osteotomy line design schemes under centric occlusion based on two distinct material assignment methods,evaluate biomechanical properties of the models,and explore which osteotomy line design schemes are more suitable for different types of mandibles.Methods Three types of mandibles were selected,and CT images were obtained for three-dimensional(3D)reconstruction.Material assignment was completed using the cortical/cancellous bone assignment method and the gray value assignment method.Osteotomy was simulated according to the three osteotomy line design schemes,followed by finite element analysis.Results In all simulation results of the mandibles,the maximum stress was 81.10 MPa,the maximum strain was 0.035 52,and the maximum displacement was 432.4 μm.The stress distributions obtained by the cortical/cancellous bone assignment method showed a larger stress distribution range than that that by the gray value assignment methods,but the maximum stress,strain,and displacement were generally lower.For the outflare type and common type mandibles,Scheme 1 showed lower maximum stress,strain,and displacement under both material assignment methods,but no clearly suitable scheme was found for the retracted type.Conclusions The outflare type and common type mandibles are more suitable for adopting the osteotomy line design scheme of Scheme 1.For the retracted type,other mandibular angle osteotomy plastic surgery methods may be considered to ensure better biomechanical characteristics.Whether choosing the osteotomy line design scheme or the modeling material assignment method,it is necessary to make the final decision based on the specific analysis objective and resource conditions.
