Twenty-four males were divided into four groups for this study: intact, ACL deficient, single-bundle reconstructed, and double-bundle reconstructed. Kinematic data were collected using a 10-camera optoelectronic motion analysis system while the participants performed high-demand landing and pivoting tasks. The evaluation period was defined as the time from when the tested foot made contact with the ground to takeoff, and the range of tibial rotation was measured.
Rotation was significantly reduced in the single-bundle ACL reconstructed knees (7.8掳聽卤聽3.4掳) and double-bundle ACL reconstructed knees (7.5掳聽卤聽2.6掳) in comparison with ACL-deficient knees (13.5掳聽卤聽3.7掳; p聽<聽0.05). There was no significant difference in terms of tibial rotation between the intact knees (6.5掳聽卤聽3.5掳) and the single-bundle or double-bundle ACL reconstructed knees after >2 years of follow up (p聽>聽0.05).
By using a dynamic functional biomechanical assessment, we demonstrate that the single-bundle ACL reconstruction technique using a composite hamstring tendon graft and the double-bundle ACL reconstruction technique can adequately restore excessive tibial rotation during high-demand activities such as landing and pivoting.