Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (17): 3052-3055.doi: 10.3969/j.issn.1673-8225.2012.17.004

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Influence of step width and abduction angle on necrotic femur head by three-dimensional finite element method 

Tian Feng-de, Zhao De-wei, Guo Lin, Yang Lei, Chen Bing-zhi   

  1. Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian  116001, Liaoning Province, China
  • Received:2011-09-21 Revised:2011-11-29 Online:2012-04-22 Published:2012-04-22
  • Contact: Zhao De-wei, Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, Liaoning Province, China tianfengde@163.com
  • About author:Tian Feng-de★, Master, Attending physician, Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, Liaoning Province, China
  • Supported by:

     the National Natural Science Foundation of China, No. 30670542*

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Abstract:

BACKGROUND: Now, effects of step width and abduction angle of hip joint in daily life on necrotic femur head are not well known, and related experimental studies are few.
OBJECTIVE: To study the influence of step width and abduction angle on necrotic femur head with three-dimensional finite element method.
METHODS: One male patient who suffered avascular necrosis of femoral head with his right femoral (ARCO II) were treated with spiral CT scan at the proximal femur. Three-dimensional finite element models were established by professional medical modeling software (MIMICS and HYPERMESH). Boundary conditions and loading conditions were set. Finite element analysis software ANSYS was used to perform calculations.
RESULTS AND CONCLUSION: Along with increase of step width (0-60°) and abduction angel (0-10°), the value of maximum stress distributed on the necrotic femoral head increased. It is indicated that step width and abduction angle can affect stress distribution on the necrotic femur head, patients should reduce step width and abduction angle during the treatment and rehabilitation.

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