POSTER ABSTRACTS - ISAKOS

23 cases Presenter an isolated ACL injury in the
unilateral knee were prospectively examined. All
23 underwent ACLR using hamstrings at 80 N
force for graft fixation, and underwent the metal
removal at a mean of 13 months after ACLR. There
were 12 males and 11 females, with a mean age at
ACLR of 27 years. Lateral radiographs of the knee
in passive terminal extension under anesthesia
were obtained at just before ACLR, at just after
ACLR, and at the time of metal removal. We
investigated the temporal changes in the tibial
position against the femur on the lateral
radiographs using computer analysis.
Results:
The mean side-to-side difference on KT-2000 in 20
degree flexion was 5.9 (SD: 2.2) mm at before
ACLR, and was 1.8 (SD: 1.0) mm at metal removal.
On lateral radiographs in passive terminal
extension, the mean side-to-side difference in
tibial position against the femur at just before
ACLR, at just after ACLR, and at metal removal,
was 1.8 (SD: 2.5) mm, -1.5 (SD: 2.5) mm, and 1.6
(SD: 2.9) mm, respectively. Statistical significance
was not found between at just before ACLR and at
metal removal. However, the side-to-side
difference in tibial position at the metal removal
was correlated to that at just after ACLR (r=0.57,
p