RT Journal Article
SR Electronic
T1 The contour of cementless femoral stem has minor effect on initial periprosthetic von Mises stress distribution. A 3-dimensional finite element analysis
JF Saudi Medical Journal
JO Saudi Med J
FD Prince Sultan Military Medical City
SP 947
OP 951
VO 30
IS 7
A1 Hu, Kong-Zu
A1 Zhang, Xian-Long
A1 Wang, Cheng-Tao
A1 Ji, Wen-Ting
YR 2009
UL http://smj.org.sa/content/30/7/947.abstract
AB OBJECTIVE: 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.