The contour of cementless femoral stem has minor effect on initial periprosthetic von Mises stress distribution. A 3-dimensional finite element analysis

Authors

• Kong-Zu Hu, Department of Orthopaedic Surgery, the 6th Shanghai People's Hospital, Shanghai Jiaotong University school of Medicine, Shanghai Jiaotong University, Shanghai, PR China.
• Xian-Long Zhang, Department of Orthopaedic Surgery, the 6th Shanghai People's Hospital, Shanghai Jiaotong University school of Medicine, Shanghai Jiaotong University, Shanghai, PR China.
• Cheng-Tao Wang, Department of Orthopaedic Surgery, the 6th Shanghai People's Hospital, Shanghai Jiaotong University school of Medicine, Shanghai Jiaotong University, Shanghai, PR China.
• Wen-Ting Ji, Department of Orthopaedic Surgery, the 6th Shanghai People's Hospital, Shanghai Jiaotong University school of Medicine, Shanghai Jiaotong University, Shanghai, PR China.

Abstract

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.

Article Type

Research Article

First Page

947

Last Page

951

Recommended Citation

Hu, Kong-Zu; Zhang, Xian-Long; Wang, Cheng-Tao; and Ji, Wen-Ting (2009) "The contour of cementless femoral stem has minor effect on initial periprosthetic von Mises stress distribution. A 3-dimensional finite element analysis," Saudi Medical Journal: Vol. 30: Iss. 7, Article 17.
DOI: https://doi.org/10.15537/1658-3175.4779