中国组织工程研究2017，Vol.21Issue(11)：1652-1657,6.DOI:10.3969/j.issn.2095-4344.2017.11.003
全髋关节置换假体不同角度的生物力学特点
Position and biomechanical characteristics of prosthesis in total hip arthroplasty
摘要
Abstract
BACKGROUND: Total hip arthroplasty is a commonly used treatment, but it is difficult to accurately determine the position of the pelvis, which is easy to cause pelvic displacement postoperatively. Additionally, the implant is likely to present with angle deviation, and the precise location and direction of prosthesis is difficult to identify.OBJECTIVE: To study the position and biomechanical characteristics of prosthesis in total hip arthroplasty.METHODS: (1) One male volunteer received CT examination, and a finite element model of the pelvic was established.Three acetabular placement positions (abduction angles of 0°, 20° and 25° combined with anteversion angles of 35°, 15°and 10°) were used to perform total hip arthroplasty, and the peak von Mises stress was detected under a load of 240 N.(2) Six cadaver specimens were collected and received the same interventions with the former experiment, and the stress changes at the bone cortex surrounding femoral shaft and acetabular anterior and posterior wall were measured using resistance strain technology.RESULTS AND CONCLUSION: (1) The peak von Mises stress in the acetabulum at abduction angle of 25° combined with anteversion angle of 10° increased by 25.7%. The peak von Mises stress in the acetabular cup at abduction angles of 0°, 20° and 25° combined with anteversion angles of 35°,15° and 10° was 135.21, 68.3 and 134.2 MPa, respectively.The peak von Mises stress in the lining at abduction angles of 0°, 20° and 25° combined with anteversion angles of 35°,15° and 10° was 6.8, 3.9 and 6.7 MPa, respectively. The peak von Mises stress in the femoral shaft at abduction angles of 0°, 20° and 25° combined with anteversion angles of 35°,15° and 10° was 127.1, 100.2 and 128.2 MPa,respectively. (2) The stress at the bone cortex surrounding femoral shaft and acetabular anterior and posterior wall at abduction angles of 0° and 25° combined with anteversion angles of 35° and 10° was significantly higher than that at abduction angle of 20° combined with anteversion angle of 15°. To conclude, an abduction angle of 20° combined with anteversion angle of 15° is conductive for functional recovery of the joint.关键词
骨科植入物/人工假体/全髋关节置换/假体位置/生物力学特性/有限元模型/CT扫描/力学加载/VonMises应力/电阻应变片技术/关节功能分类
医药卫生引用本文复制引用
王春成,李明哲..全髋关节置换假体不同角度的生物力学特点[J].中国组织工程研究,2017,21(11):1652-1657,6.基金项目
河南省教育科学"十二五"规划2013年度课题( [2013]-JKGHB-0098) the Project of the 12th Five-Year Plan of Henan Provincial Educational Science in 2013,No. [2013]-JKGHB-0098 （ [2013]-JKGHB-0098）
