Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (4): 629-632.doi: 10.3969/j.issn.1673-8225.2011.04.014

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Biomechanical changes in bone anchor fixation of tibial anterior tendon in orthopedic surgery of congenital clubfoot 

Chen Bo, Du Yuan-li, Li Yu-peng, Wang Hua, Wu Bin, Ru Neng, Le Jin-bo   

  1. Department of Orthopaedics, People’s Hospital of China Three Gorges University, Yichang  443000, Hubei Province, China
  • Received:2010-09-05 Revised:2010-10-10 Online:2011-01-22 Published:2011-01-22
  • About author:Chen Bo★, Master, Associate chief physician, Department of Orthopaedics, People’s Hospital of China Three Gorges University, Yichang 443000, Hubei Province, China chenbo71@sina.com
  • Supported by:

    Yichang Health Science and Technology Development Program of Hubei Province in 2009, No. A09301-14 

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Abstract:

BACKGROUND: In orthopedic surgery for congenital clubfoot, the tibial anterior tendon is commonly reattached to the cuneiform bone with wire, which should be pulled out by second surgery and might induce infection. Bone anchor has been attempted to fix tibial anterior tendon.
OBJECTIVE: To explore the biomechanical properties of bone anchor to fix tibial anterior tendon in orthopedic surgery of congenital clubfoot.
METHODS: The anterior tibial tendon and the cuneiform bone were dissected from the amputated children's leg, which were fixed with a Mitek GII bone anchor or No. 2 Ethibond suture. All samples were subjected to biomechanical vertical pull testing until failure.
RESULTS AND CONCLUSION: In the bone anchor fixation failure mode: all 10 bone anchors were pulled out without suture broken or anchor damaged. The average maximum pullout load was 137 N. In The suture fixation failure mode: 10 No. 2 Ethibond sutures all broke, and the average maximum pullout load was 92 N. Biomechanical properties of bone anchor are better than suture, which achieve the strength to fix the anterior tibial tendon in orthopedic surgery of congenital clubfoot.

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