Femoral tunnel increase smaller with interference screw versus cortical button fixation in ACLR .
Tunnel widening after ACL reconstruction with aperture screw fixation or all-inside reconstruction with suspensory cortical button fixation: Volumetric measurements on CT and MRI scans
Knee. 2017 Oct;24(5):1047-105433 patients scheduled for ACL reconstruction were included in this study to compare the effects of different fixation methods on postoperative tunnel widening. Patients were randomized to reconstruction using aperture screw fixation or suspensory cortical button fixation. Tunnel volume was measured over a 6 month period using MRI and CT scans. The results at 6 months indicated no differences between the two groups for tibial tunnel volume (117.7+/-24.1% button group vs. 113.9+/-10.3% screw group (p=0.565)). While the femoral tunnel volume at 6 months was significantly greater in the button group (143.2+/-34.4%) compared to the screw group (119.8+/-19.2%) (p=0.023).
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