Long-term study of bone remodelling after femoral stem:: A comparison between dexa and finite element simulation

被引:52
作者
Herrera, Antonio [1 ,2 ]
Panisello, Juan J. [1 ,2 ]
Ibarz, Elena [3 ]
Cegonino, Jose [3 ]
Puertolas, Jose A. [4 ]
Gracia, Luis [3 ]
机构
[1] Miguel Servet Univ Hosp, Dept Orthopaed Surg & Traumatol, Zaragoza 50009, Spain
[2] Univ Zaragoza, Dept Surg, E-50009 Zaragoza, Spain
[3] Univ Zaragoza, Dept Mech Engn, E-50009 Zaragoza, Spain
[4] Univ Zaragoza, Dept Sci & Technol Mat, E-50009 Zaragoza, Spain
关键词
bone remodelling; finite element analysis; hip replacement prosthesis;
D O I
10.1016/j.jbiomech.2007.06.008
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
A hip replacement with a cemented or cementless femoral stem produces an effect on the bone called adaptive remodelling, attributable to mechanical and biological factors. The objective of all of cementless prostheses designs has been to achieve a perfect transfer of loads in order to avoid stress-shielding, which produces an osteopenia. In order to quantify this, the long term and mass produced study with dual energy X-ray absorptiometry (DEXA) is necessary. Finite element (FE) simulation makes possible the explanation of the biomechanical changes which are produced in the femur after stem implantation. The good correlation obtained between the results of the FE simulation and the densitometric study allow, on one hand, to explain from the point of view of biomechanical performance the changes observed in bone density in the long-term, where it is clear that these are due to a different transfer of load in the implanted model compared to the healthy femur; on the other hand, it validates the simulation model, in a way that it can be used in different conditions and at different time periods, to carry out a sufficiently precise prediction of the evolution of the bone density from the biomechanical behaviour in the interaction between the prosthesis and femur. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3615 / 3625
页数:11
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