Title of article :
The contour of cementless femoral stem has minor effect on initial periprosthetic von Mises stress distribution. A 3- dimensional finite element analysis
Author/Authors :
Hu, Kong-Zu Shanghai Jiaotong University school of Medicine - the 6th Shanghai People s Hospital - Department of Orthopaedic Surgery, China , Zhang, Xian-Long Shanghai liaotong University school of Medicine - the 6th Shanghai People s Hospital - Department of Orthopaedic Surgery, China , Wang, Cheng-Tao Shanghai liaotong University - Institute of Biomedical Manufocturing and Life Quality Engineering, China , Ji, Wen-Ting Shanghai liaotong University - Institute of Biomedical Manufocturing and Life Quality Engineering, China
Abstract :
Objectives: To evaluate periprosthetic von Mises stress distribution with cementless femoral stems of various contours.Methods: The study was carried out at the Department of Orthopaedics, Shanghai 6th Hospital, Shanghai, China between May 2008 and February 2009. Finite element models of proximal femoral replacement with 4 cementless stems (Alloclassic, Ribbed Anatomic, VerSys, and Securi-fit) of various contours were set up. Under the loading conditions of walking and stair climbing, 3-dimensional periprosthetic von Mises stresses were calculated, and the stress distribution patterns were compared.Results: Periprosthetic stresses were increased in level 1, 2, and 3 under the 2 loading conditions, and more considerably in level 2 and 3. The stresses were higher on the medial side in all cases. No remarkable difference was found in the patterns between the 4 stems.Conclusion: The contour design of femoral stem has minor effect on initial periprosthetic von Mises stress distribution
Journal title :
Saudi Medical Journal
Journal title :
Saudi Medical Journal
