study of bone remodeling of two models of femoral cementless stems by means of dexa and finite elements研究两个模型的骨重建股骨cementless茎用和有限元素.pdf

Gracia et al. BioMedical Engineering OnLine 2010, 9:22 /content/9/1/22 R E S E A R C H Open Access Research Study of bone remodeling of two models of femoral cementless stems by means of DEXA and finite elements 1 1 1 1 2,3 4,5 Luis Gracia , Elena Ibarz , Sergio Puértolas , José Cegoñino , Fernando López-Prats , Juan J Panisello and Antonio Herrera*4,5 * Correspondence: Abstract aherrera@salud.aragon.es Background: A hip replacement with a cemented or cementless femoral stem produces 4 Department of Surgery, University of Zaragoza, an effect on the bone called adaptive remodelling, attributable to mechanical and Domingo Miral s/n, 50009 biological factors. All of the cementless prostheses designs try to achieve an optimal load Zaragoza, Spain transfer in order to avoid stress-shielding, which produces an osteopenia. Full list of author information is available at the end of the article Long-term densitometric studies taken after implanting ABG-I and ABG-II stems confirm that the changes made to the design and alloy of the ABG-II stem help produce less proximal atrophy of the femur. The simulation with FE allowed us to study the biomechanical behaviour of two stems. The aim of this study was, if possible, to correlate the biological and mechanical findings. Methods: Both models with prostheses ABG-I and II have been simulated in five different