Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (9): 1605-1608.doi: 10.3969/j.issn.1673-8225.2012.09.020

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Stress relaxation study of tibial fractures treated by three types of fixation devices 

Wu Zhi-feng1, Li Yan-ling2, Liu Guang-yao3, Ma Hong-shun4   

  1. 1The Armed Police Corps Hospital of Jilin Province, Changchun  130028, Jilin Province, China; 2College of Traffic, Jilin University, Changchun  130022, Jilin Province, China; 3China-Japan Friendship Hospital of Jilin University, Changchun  130031, Jilin Province, China; 4Department of Engineering Mechanics, Nanling Campus, Jilin University, Changchun  130022, Jilin Province, China
  • Received:2011-07-25 Revised:2011-09-16 Online:2012-02-26 Published:2012-02-26
  • Contact: Liu Guang-yao, Doctor, Professor, China-Japan Friendship Hospital of Jilin University, Changchun 130031, Jilin Province, China lgy@jlu.edu.cn
  • About author:Wu Zhi-feng★, Studying for master’s degree, Attending physician, The Armed Police Corps Hospital of Jilin Province, Changchun 130028, Jilin Province, China mhs@jlu.edu.cn

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Abstract:

BACKGROUND: Bone mechanics is a branch of biomechanics. Biomechanical property research of fractures after internal and external fixation is an important method to estimate the fixed-effects.
OBJECTIVE: To compare the stress relaxation properties of tibial fractures fixed by three different internal and external fixation devices.
METHODS: The simulated tibial fractures were fixed by the intramedullary nails, plate, and external fixation respectively. Axial compression stress relaxation experiment was performed in the specimens of the three groups using electronic universal testing machine.
RESULTS AND CONCLUSION: Axial compression stress relaxation curves of the specimens fixed with internal and external fixation in each group showed that the stress relaxation at 7 200 s in the external fixation group was higher than those of the plate fixation group and the intramedullary nail fixation group, but the differences were not significant (P > 0.05). The results preliminary showed that the effects of plate fixation, intramedullary nail fixation, and external fixation on stress relaxation property of bone in femoral neck fractures were similar.

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