Biomechanical characterization of double-bundle femoral press-fit fixation techniques.

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA
M EttingerM Jagodzinski

Abstract

Press-fit fixation of patellar tendon bone anterior cruciate ligament autografts is an interesting technique because no hardware is necessary. To date, no biomechanical data exist describing an implant-free double-bundle press-fit procedure. The purpose of this study was to characterize the biomechanical properties of three double-bundle press-fit fixations. In a controlled laboratory study, the patellar-, quadriceps- and hamstring tendons of 10 human cadavers (age: 49.2 ± 18.5 years) were used. An inside out press-fit fixation with a knot in the semitendinosus and gracilis tendons (SG) combined with an additional bone block, with two quadriceps tendon bone block grafts (QU) was compared with press-fit fixation of two bone patellar tendon bone block (PT) grafts in 30 porcine femora. Constructs were cyclically stretched and then loaded until failure. Maximum load to failure, stiffness and elongation during failure testing and cyclical loading were investigated. The maximum load to failure was 703 ± 136 N for SG fixation, 632 ± 130 N for QU and 656 ± 127 N for PT fixation. Stiffness of the constructs averaged 138 ± 26 N/mm for SG, 159 ± 74 N/mm for QU, and 154 ± 50 N/mm for PT fixation. Elongation during initial cyclical loading ...Continue Reading

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Citations

Jul 4, 2013·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·M EttingerM Jagodzinski
Jun 23, 2011·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·M EttingerM Jagodzinski
Jan 29, 2016·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·M EttingerM Petri

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