髋臼横断骨折双柱内固定的生物力学分析  

Biomechanical analysis of double-column internal fixation on acetabular transverse fracture

作　　者：吴淑琴[1] 

机构地区：[1]中北大学机械工程与自动化学院,山西省太原市030051

出　　处：《中国组织工程研究》2012年第22期4067-4070,共4页Chinese Journal of Tissue Engineering Research

基　　金：国家自然科学基金项目资助(30870603)~~

摘　　要：背景:骨盆髋臼骨折治疗的关键是精确的骨折复位和稳定的内固定。目的:分析比较3种髋臼横断骨折双柱内固定手术的生物力学特性,找到固定效果最好的双柱内固定手术方法。方法:建立各向异性的骨盆髋臼横断骨折模型,通过对最大位移、最大等效应力等评价指标的有限元综合分析,比较分析双柱螺钉、前柱螺钉后柱钢板、双柱钢板等3种双柱内固定方法在站立位置的生物力学性能差异。结果与结论:有限元分析双柱螺钉固定最大位移1.827mm,最大等效应力26.589MPa;前柱螺钉后柱钢板固定最大位移2.080mm,最大等效应力106.04MPa;双柱钢板固定最大位移2.987mm,最大等效应力200.37MPa。3种双柱内固定方法稳定性最好的是双柱螺钉固定,最后是双柱钢板固定。BACKGROUND： The key of pelvic and acetabular fracture treatment is accurate fracture reduction and stable internal fixation. OBJECTIVE： To analyze the biomechanical characteritics of three kinds of double-column internal fixation operation for acetabular transverse fracture in order to find the most stable method. METHODS： Anisotropic pelvic fracture model was established, and based on the maximum displacement, the maximum equivalent stress and other comprehensive evaluation indexes, the biomechanics of double-column screw, anterior-column screw and posterior-column plate, double-column plate on the standing position were analyzed. RESULTS AND CONCLUSION： Finite element analysis showed that the maximum displacement of double-column screw was 1.827 mm, maximum equivalent stress was 26.589 MPa; the maximum displacement of screw and posterior-column plate was 2.080 mm, maximum equivalent stress was 106.04 MPa; the maximum displacement of double-column plate was 2.987 mm, maximum equivalent stress was 200.37 MPa. The most stable method is double-column screw and the last one is double-column plate.

关 键 词：髋臼 横断骨折 内固定 有限元建模 生物力学 

分 类 号：R318[医药卫生—生物医学工程]