Biomechanical properties of the central third patellar tendon graft: effect of rotation.
The results of this study suggest that the central third of the patellar tendon may be stronger than previously reported. The mean ultimate load of a 15-mm bone-patellar tendon-bone composite was 4389 N (+/- 709 N); of the 10-mm wide composites, 2977 N (+/- 516 N); and of the 7-mm composites, 2238 N (+/- 316 N). Twisting the graft 90 degrees increased the strength (P < 0.05). Further twisting to 180 degrees had no significant effect compared with twisting to 90 degrees. This study supports the practice of using smaller (10 mm) bone-patellar tendon-bone grafts to avoid the potential complications of patellar fracture and graft impingement in the notch, and suggests the value of rotating the graft prior to tibial fixation.
Cooper
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W. B. Carrell Memorial Clinic, Dallas, TX 75204, USA.
D000328:Adult; D016118:Anterior Cruciate Ligament / Q000502:physiology / Q000601:surgery*; D001696:Biomechanical Phenomena; D002102:Cadaver; D005260:Female; D006801:Humans; D008297:Male; D010329:Patella / Q000601:surgery; D013710:Tendons / Q000502:physiology* / Q000637:transplantation*; D019415:Torque; D016474:Weight-Bearing