Fixation strength of tibial inlay graft with one versus two screws: a cadaveric study.
Various modes of fixation have been advocated for posterior cruciate ligament reconstruction. This study compared pullout forces and modes of failure for 2 commonly used techniques. Ten Achilles tendon-bone plug grafts were fixed to tibial troughs using either one 6.5-mm or two 4-mm cancellous screws positioned anatomically and tested to failure. The constructs did not differ statistically in mean pullout forces (385.2 and 358.8 N for the 6.5-mm and 4-mm screw constructs, respectively). The 2-screw construct failed by pullout, whereas the single-screw fixation failed through fracture. This study provides insight into the fixation used for posterior cruciate ligament reconstruction.
Munjal
Sandeep
S
Physicians' Clinic of Iowa, Cedar Rapids, Iowa, USA.
Rauh
Michael A
MA
Carney
Kimberly
K
Fineberg
Marc S
MS
Mihalko
William
W
D016118:Anterior Cruciate Ligament / Q000601:surgery*; D000070598:Anterior Cruciate Ligament Injuries; D001863:Bone Screws; D016025:Bone Transplantation / Q000295:instrumentation / Q000379:methods; D002102:Cadaver; D019544:Equipment Failure Analysis; D005593:Fracture Fixation, Internal / Q000295:instrumentation* / Q000379:methods*; D006801:Humans; D013977:Tibia / Q000637:transplantation*