臼假体位置对全髋关节置换术后假体受力及磨损的影响  

Influence of acetabular position on stress and wear of acetabular component after THA

作　　者：杨显春[1] 朱振安[1] 

机构地区：[1]上海交通大学医学院附属第九人民医院骨科,上海200011

出　　处：《医用生物力学》2008年第4期332-336,共5页Journal of Medical Biomechanics

摘　　要：全髋关节置换时臼假体的位置安放不当可导致术后脱位、增加骨-假体的应力,加快假体磨损。髋臼假体安放于轻度内上的位置可增加骨-假体界面的接触,从而降低了接触面应力,临床预后更好。计算机辅助导航系统广泛用于骨科手术中,它对空间长度和角度的定位有很好的精度。髋臼假体的外展角和前倾角显著影响THA术后假体的受力及磨损。本文还简要回顾了超高分子量聚乙烯材料磨损机制的研究进展。Improperly placed acetabular component in THA could lead to dislocation, abnormal stress concentration and increased wear of the lining. For patients with acetabulum bone defect, medially and inferior placed acetabular component could broaden the contact area between bone and prosthesis so that decreased contact stress and better clinical outcome can be expected. Orientation of placed acetabular also influences its stress distribution and wear markedlyM.o st researchers recommend that the acetabular compone...

关 键 词：全髋置换术 臼假体位置 受力 磨损 

分 类 号：R687.4[医药卫生—骨科学]