BIOMECHANICAL COMPARISON BETWEEN BIOSCREW AND TITANIUM-ALLOY INTERFERENCE SCREWS FOR BONE-PATELLAR TENDON-BONE GRAFT FIXATION IN ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION
Dnm. Caborn et al., BIOMECHANICAL COMPARISON BETWEEN BIOSCREW AND TITANIUM-ALLOY INTERFERENCE SCREWS FOR BONE-PATELLAR TENDON-BONE GRAFT FIXATION IN ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION, Arthroscopy, 13(2), 1997, pp. 229-232
This investigation compared the maximum load at failure of BioScrew (L
invatec Corp, Large, FL) and titanium ahoy interference screw femoral
fixation using a human cadaveric model that approximated the anatomica
l orientation and physiological strain rate of in vivo bone-patellar t
endon-bone (BPTB) graft loading following anterior cruciate ligament r
econstruction. Eighteen fresh-frozen human BPTB allografts (10-mm wide
, 10-mm thick, 25-mm long bone plugs) with either BioScrew or titanium
alloy (Ti 6A14V) screw (7 x 25 mm) fixation were compared for maximum
load at failure at a strain rate of 20 mm/minute. Nine cadaver femurs
with bone mineral densities of 0.88 +/- 0.18 g/cm(2) (anterior/poster
ior) and 1.3 +/- 0.24 g/cm(2) (lateral) received the allografts. No st
atistical differences were observed in maximum load at failure (P = .9
5) or failure mode (P = .11) between specimens fixed with either screw
type. When biomechanically tested with anatomic orientation and at fu
nctionally relevant strain rates, the BioScrew provided maximum load a
t failure equal to a titanium alloy screw.