1. Varus tension testing of fixation devices used in proximal tibial osteotomy
- Author
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Y, Zhang, L M, Shall, P G, Kiritsis, L, Wolfinbarger, and J R, Fairclots
- Subjects
Surgical Staplers ,Tibia ,Humans ,Bone Plates ,Biomechanical Phenomena ,Bone Wires ,Orthopedic Fixation Devices ,Osteotomy ,Prosthesis Failure - Abstract
Varus tension testing was performed on 26 matched pairs of tibias after high tibial osteotomy with three different fixation techniques--Coventry stepped staple, Mansat staple blade, and modified tension-band. Biomechanical testing revealed that in group I the Coventry stepped staple and Mansat staple blade yielded similar force at failure values of 132.44 +/- 29.29 and 137.34 +/- 40.84, respectively. In group II, the varus force at failure value was 170.45 +/- 83.95 for the modified tension band device versus 115.27 +/- 67.21 for the Coventry stepped staple device. In group III, the varus force at failure value was 180.26 +/- 82.36 for the modified tension band device versus 109.14 +/- 60.96 for the Mansat staple blade. The findings in this study suggest that the modified tension band technique provides a greater varus force at failure value, approximately 160-170%, compared to the other two techniques. In addition, this device is easy to apply and less expensive, and most orthopaedic surgeons are already familiar with its use.
- Published
- 1995