O3392 KINEMATIC EVALUATION OF DIFFERENT SURGICAL TECHNIQUES OF RECONSTRUCTION OF THE POSTEROLATERAL CORNER OF THE KNEE

Abstract

Aims: It was the aim of the present study to evaluate the resulting 3D kinematics following different surgical techniques of reconstruction in a combined posterior cruciate ligament (PCL)/posterolateral structures (PLS) injury model. Methods: In nine human cadaveric knees, 3D kinematics were recorded during the path of ßexion-extension using a computer based method. Additional laxity tests were conducted at 30¡ and 90¡ of ßexion. Testing was performed before and after cutting the PLS and PCL, followed by PCL reconstruction alone. Reconstructing the posterolateral corner, three surgical techniques were compared: 1) biceps tenodesis (BT), 2) posterolateral corner sling procedure (PLCS), and 3) bone patellar-tendon bone allograft reconstruction (BPTB). Results: Posterior as well as rotational laxity were closely restored to intact values by all tested procedures. Compared to the intact knee, 3D kinematics revealed signiþcant internal tibial rotation for 1) BT (mean = 3.9¡, p = 0.043) and for 3) BPTB allograft (mean = 4.3¡, p = 0.012). 2) PLCS demonstrated a tendency to internal tibial rotation between 0¡ and 60¡ of ßexion (mean = 2.2¡, p = 0.079). Varus/valgus rotation as well as anterior/posterior translation did not show signiþcant differences for any of the tested techniques. Conclusion: The present study showed that despite satisfying results in static laxity testing, pathological 3D knee kinematics were not restored to normal, demonstrated by a non-physiological internal tibial rotation during the path of ßexion-extension.