解放军医学院学报2026，Vol.47Issue(5)：542-549,8.DOI:10.12435/j.issn.2095-5227.26020903
骨盆不连续髋关节翻修术中定制带翼假体的有限元分析
Finite element analysis of a customized flange acetabular component in revision total hip arthroplasty with pelvic discontinuity
摘要
Abstract
Background Despite the clinical application of custom flange acetabular components(CFAC),the design of the pubic flange and the necessity of adjunctive screw fixation remain controversial,primarily due to a lack of relevant biomechanical evidence.Objective To compare the biomechanical differences between two CFAC designs under load using finite element analysis,providing a theoretical basis for clinical decision-making and prosthesis optimization.Methods A three-dimensional pelvic model was reconstructed from CT data of a patient with a Paprosky type Ⅲ B acetabular defect and posterior column discontinuity.Two CFAC models were designed:a Dualflange construct without pubic flange fixation and a Triflange construct with pubic flange fixation.Finite element models were established using Abaqus software to simulate standing conditions.Peak stress and micromotion of the two prostheses and their fixation screws were evaluated and compared.Results In both designs,peak stress was observed at the junction between the iliac flange and the acetabular shell.The Triflange prosthesis exhibited a peak stress of 39.46 MPa,approximately 25%lower than that of the Dualflange prosthesis(52.62 MPa).Peak screw stress in the Triflange group was 33.59 MPa,approximately 27%lower than that in the Dualflange group(45.71 MPa).Micromotion analysis showed that the screws at the acetabular roof and ischial flange demonstrated more pronounced micromotion compared to others.Conclusion The addition of a pubic flange with fixation reduces peak stress and micromotion of both the CFAC prosthesis and its fixation screws.In complex acetabular defects of this type,pubic flange design and fixation may provide relevant clinical benefits.关键词
髋关节翻修术/髋臼缺损/定制带翼髋臼假体/有限元分析/骨盆不连续Key words
revision total hip arthroplasty/acetabular defect/customized flange acetabular component(CFAC)/finite element analysis/pelvic discontinuity分类
医药卫生引用本文复制引用
张祯,智信,倪明,柴伟..骨盆不连续髋关节翻修术中定制带翼假体的有限元分析[J].解放军医学院学报,2026,47(5):542-549,8.基金项目
北京市自然科学基金昌平创新联合基金项目(L234011) （L234011）
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