Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (52): 9734-9737.doi: 10.3969/j.issn.1673-8225.2011.52.010

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Design and biomechanical characteristics of adjustable multi-plane unilateral external fixator

Shen Lu-feng1, Li Zhen-su2, Dong Xie-ping3, Wu Xiao-hui1, Wang Jin-cheng1   

  1. 1Department of Orthopedics Traumatology, People’s Hospital of Jiangxi Province, Nanchang  334000, Jiangxi Province, China
    2Department of Orthopedics, Zaozhuang City People’s Hospital in District, Zaozhuang  277000, Shandong Province, China
    3Second Department of Orthopedics, People’s Hospital of Jiangxi Province, Nanchang  334000, Jiangxi Province, China
  • Received:2011-06-22 Revised:2011-11-25 Online:2011-12-24 Published:2011-12-24
  • Contact: Dong Xie-ping, Chief physician, Master’s supervisor, Second Department of Orthopedics, People’s Hospital of Jiangxi Province, Nanchang 334000, Jiangxi Province, China dongxieping@medmail.com.cn
  • About author:Shen Lu-feng★, Master, Physician, Department of Orthopedics Traumatology, People’s Hospital of Jiangxi Province, Nanchang 334000, Jiangxi Province, China shenlufeng2007@yahoo.cn
  • Supported by:

    National “Eleventh Five-Year” Science and Technology Support Project, No. 2008BAI68B06*; Traditional Chinese Medicine Project of Jiangxi Province Health Department, No. 04B15*

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Abstract:

BACKGROUND: Fracture patients after treated with damage control fixation, when needed a secondary fixation under conditions improved, another appropriate nail point for re-fixation is necessary, or complicated components is configured before fixation to adjust the original nail position.
OBJECTIVE: To design a adjustable multi-plane unilateral external fixation device for opening extremities comminuted fracture fixation and secondary non-invasive reduction and fixation under abnormal medical conditions, and to detect biomechanics of the device.
METHODS: Totally 24 femur specimens of the adult large pigs were prepared to construct 12 comminuted fracture models, then divided into experimental group with self-installing adjustable multi-plane unilateral external fixation and control group with installation of AO external fixation. Biomechanical testing was done separately in axial, shear and rotary conditions.
RESULTS AND CONCLUSION: There were no significant difference of anti-stress, anti-bending and anti-rotation in the experimental and control groups. The adjustable multi-plane unilateral external fixation can install nail arbitrary for temporary reduction and fixation within 1/3 perimeter of the injured limb. When secondary fixation, original components can fix firmly without re-set screw.

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