Three-dimensional finite element analysis of stress distribution in necrotic femoral head before and after tantalum rod implantation
10.3969/j.issn.2095-4344.2016.26.013
- VernacularTitle:股骨头坏死区钽棒置入前后应力分布的三维有限元分析
- Author:
Gang ZHU
;
Ligui ZHANG
;
Zhong ZHENG
;
Mingjie XU
;
Ming YANG
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2016;20(26):3883-3889
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND:Tantalum rod implant technology is a new method of early osteonecrosis treatment. Current research on stress distribution before and after tantalum rod implant in different sizes of femoral head necrosis area is few. OBJECTIVE:To analyze the stress distribution before and after tantalum rod implantation in different sizes of necrotic femoral head area using three-dimensional finite element method. METHODS:Three-dimensional finite element models of normal femoral head and necrotic femoral head of 15, 20 and 30 mm diameterwere constructed. Eight measuring points were chosen on two tiers of each necrotic model to detect the stress distribution and its alteration before and after tantalum rod implantation. RESULTS AND CONCLUSION:(1) Stress concentration werefound on every necrotic femoral head, most pronounced on the one with 30 mm lesion. (2) Tantalum implant appeared to reduce the stress concentration generaly. Comparison of the peak points of these models indicated most significant benefit in 15 mm lesion, next in 30 mm lesion, last in 20 mm lesion. (3) Results indicate that larger lesion entails more concentrated stress distribution and more likely to colapse. Tantalum rod implantation can delay the development of necrosis of the femoral head, andismost effective in smal lesion.
