Outcomes of Combined Posterolateral Knee Reconstruction: ACL vs PCL Injuries
Overview
This study compared post-operative sports activity and work ability in patients undergoing combined posterolateral corner reconstruction (PLC-R) with either anterior cruciate ligament (ACL) or posterior cruciate ligament (PCL) reconstruction. Results demonstrated superior functional outcomes, higher return-to-sport rates, and better work ability in ACL-based injuries compared to PCL-based injuries.
Background
Posterolateral corner (PLC) injuries of the knee often occur with concomitant ligamentous injuries, particularly involving the ACL or PCL. These injuries cause instability and pain, potentially accelerating osteoarthritis. While combined PCL-PLC injuries have been studied extensively, less is known about combined ACL-PLC injuries. Biomechanically, PLC insufficiency increases varus load on the ACL graft, suggesting combined reconstruction is necessary to restore knee kinematics and improve outcomes.
Data Highlights
Parameter
ACL-Based Injury Group
PCL-Based Injury Group
Post-operative Tegner Activity Scale
Higher scores (exact values not provided)
Lower scores
Return-to-Sport Rate
Higher
Lower
Work Ability
Better post-operative work intensity
Reduced work ability
Time to Return to Work
Shorter
Longer
Key Findings
Patients with combined ACL-PLC injuries achieved higher post-operative sports activity levels compared to those with PCL-PLC injuries.
Return-to-sport rates were significantly greater in the ACL-based injury group.
Work ability and intensity post-operatively were better preserved in patients with ACL-based injuries.
Time to return to work was shorter in the ACL group compared to the PCL group.
Combined reconstruction of PLC with ACL or PCL is necessary to restore knee biomechanics and improve functional outcomes.
Clinical Implications
Clinicians should anticipate better functional recovery and earlier return to sports and work in patients undergoing combined PLC and ACL reconstruction compared to those with PCL-based injuries. Tailored patient education regarding expected outcomes and rehabilitation timelines is essential, especially for PCL-PLC injury patients who may experience prolonged recovery and reduced work capacity.
Conclusion
Combined posterolateral corner reconstruction yields superior post-operative sports and work outcomes in ACL-related injuries compared to PCL-related injuries. These findings support the importance of injury-specific rehabilitation and patient counseling.
References
Technical University of Munich Study 2011-2017 -- Outcomes of Combined Posterolateral Knee Reconstruction
A small observational study in collegiate football players found microbiome associations after nonconcussive head impacts, though findings were limited by severe underpowering and high attrition
Female athletes are two to eight times more likely to tear their anterior cruciate ligament (ACL) than their male counterparts performing the same sport at the same level. They are also at greater risk for other ligament and tendon injuries, such as ankle sprains.
