An evaluation of reconstructed ACL impingement on PCL using MRI

The PCL Index Is Correlated With the Control of Rotational Kinematics That Is Achieved After Anatomic Anterior Cruciate Ligament Reconstruction

“…These authors suggested that with the knee slightly flexed and resting on a pillow, the femur drops back slightly in relation to the tibia, resulting in some redundancy in the length of the PCL, and in this way, the change in the shape of the PCL is better demonstrated. 4,33 Similar to other studies that reported on the PCL index in the extended knee, 18,27,30 we also found differences between ACL-reconstructed patients and controls. This may be caused by anterior tibial subluxation occurring even in the fully extended knee or as a result of a position of internal rotation in the ACL-reconstructed knee.…”

“…18,30 After ACL reconstruction (ACLR), the PCL index has been described mainly with reference to impingement of ACL grafts on the PCL. 27 Although the PCL index is commonly used in clinical practice as an outcome measure 11 of ACLR, there is still no scientific evidence to demonstrate its clinical value and the relationship with knee joint laxity and kinematics that is achieved after anatomic ACLR.…”

Anterior Cruciate Ligament Reconstruction in Patients with Generalized Joint Laxity

“…However, the posterior tibial tunnel can result in an impingement of the graft on the PCL. This was also reported by Nishimori et al67) With a posteriorly placed tibial tunnel, they reported that 52% (22 out of 42) of reconstructed ACL grafts had impingement on the PCL at the 12 month follow-up. Moreover, posterior placement of the tibial tunnel can result in an elongation of the graft in extension and also vertical tilting of the graft, which might not be ideal for withstanding the anterior draw forces.…”

Effect of Femoral Socket Position on Graft Impingement After Anterior Cruciate Ligament Reconstruction

“…Impingement by the reconstructed ACL on the native PCL has been documented in prior MRI studies. 15 However, the bone-morphing software is not validated for morphing soft tissue structures. Moving the femoral tunnel down the wall effectively lateralizes the position of the femoral insertion.…”