Displacement of the Hip Center of Rotation After Arthroplasty of Crowe III and IV Dysplasia: A Radiological and Biomechanical Study

被引:60
作者
Abolghasemian, Mansour [1 ,2 ]
Samiezadeh, Saeid [3 ]
Jafari, Davood [1 ]
Bougherara, Habiba [3 ]
Gross, Allan E. [2 ]
Ghazavi, Mohammad T. [1 ]
机构
[1] Univ Tehran Med Sci, Shafa Hosp, Dept Orthoped Surg, Tehran, Iran
[2] Univ Toronto, Mt Sinai Hosp, Div Orthoped Surg, Toronto, ON M5G 1X5, Canada
[3] Ryerson Univ, Dept Mech & Ind Engn, Toronto, ON M5B 2K3, Canada
关键词
hip center of rotation; dysplasia; joint reaction force; abductor muscle force; ABDUCTOR MUSCLE STRENGTH; JOINT CENTER LOCATION; FOLLOW-UP; DEVELOPMENTAL DYSPLASIA; CONGENITAL DISLOCATION; SUPERIOR PLACEMENT; REPLACEMENT; REVISION; RECONSTRUCTION; POSITION;
D O I
10.1016/j.arth.2012.07.042
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
100224 [整形外科学];
摘要
To study the direction and biomechanical consequences of hip center of rotation (HCOR) migration in Crowe type III and VI hips after total hip arthroplasty, post-operative radiographs and CT scans of several unilaterally affected hips were evaluated. Using a three-dimensional model of the human hip, the HCOR was moved in all directions, and joint reaction force (JRF) and abductor muscle force (AMF) were calculated for single-leg stance configuration. Comparing to the normal side, HCOR had displaced medially and inferiorly by an average of 23.4% and 20.8%, respectively, of the normal femoral head diameter. Significant decreases in JRF (13%) and AMF (46.13%) were observed in a presumptive case with that amount of displacement. Isolated inferior displacement had a small, increasing effect on these forces. In Crowe type III and IV hips, the HCOR migrates inferiorly and medially after THA, resulting in a decrease in JRF, AMF, and abductor muscle contraction force. (C) 2013 Elsevier Inc. All rights reserved.
引用
收藏
页码:1031 / 1035
页数:5
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