Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (13): 2462-2466.doi: 10.3969/j.issn.1673-8225.2010.13.045

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Finite element mechanical analysis on fracture hip supporting joint for treatment of femoral neck fracture

Shi Zhen-man1, Shi Jiang1, Wang Xin1, Guo Shu-zhang1, Wu Yue2, Peng Jiang1   

  1. 1 Military Orthopedic Center, Urumqi General Hospital of Lanzhou Military Area Command of Chinese PLA, Urumqi   830000, Xinjiang Uygur Autonomous Region, China; 2 Department of Precision Instrument, Tsinghua University, Beijing   100084, China
  • Online:2010-03-26 Published:2010-03-26
  • About author:Shi Zhen-man, Chief physician, Military Orthopedic Center, Urumqi General Hospital of Lanzhou Military Area Command of Chinese PLA, Urumqi 830000, Xinjiang Uygur Autonomous Region, China gszlch@yahoo.com.cn
  • Supported by:

    A Grant from Tenth Five-Year Plan of Chinese PLA, No. 04Z04*

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Abstract:

BACKGROUND: For treatment of femoral neck fracture, all therapies with the exception of joint replacement encounter the problems including slow healing, poor prognosis, various complications, and unable to bear weight for long time. Fracture hip supporting joint (FHSJ) is a novel unlimited hip support implement that possesses the double functions of fracture fixation and joint supporting and can be used to prevent and treat the complications of femoral neck fracture in young people.
OBJECTIVE: To investigate the mechanical effects of FHSJ on treatment of femoral neck fracture.
METHODS: Three types of two-dimensional finite element models were constructed by AutoCAD: normal hip (group A), femoral neck fracture fixed with two screws (group B), and femoral neck fracture fixed with two screws and FHSJ (group C). The grids of two-dimensional four nodal point elements were divided by ANSYS (PLANE82). Under the identical condition, the calculations were performed respectively.
RESULTS AND CONCLUSION: The stress peak value of femoral head weight-bearing zone was 1.029 and 1.63 MPa in group A and group B, respectively, and that in the group C was 0.1-0.4 MPa. The stress peak value of the screws was 37.186 and 7.474 MPa in the group B and group C, respectively. These results indicate that FHSJ installation based on fixation of multiple screws could promote the recovery of femoral head and neck, which exhibits promising prospects in treatment of femoral neck fracture in young people.

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