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Updated: Jul 4, 2026

Arthroscopic Excision of Posterior Cruciate Ligament Cysts Using a Double Posteromedial Approach

Arthroscopic Excision of Posterior Cruciate Ligament Cysts Using a Double Posteromedial Approach

Published on: October 20, 2023

Double-bundle PCL and posterolateral corner reconstruction components are codominant.

Craig S Mauro¹, Jon K Sekiya, Kathryne J Stabile

¹Department of Orthopaedic Surgery, University of Pittsburgh, 3200 South Water Street, Pittsburgh, PA 15203, USA.

Clinical Orthopaedics and Related Research

|June 5, 2008

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Meniscal Repair in the Setting of Revision Anterior Cruciate Ligament Reconstruction: 6-Year Follow-up Results From the MARS Cohort.

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This study reveals that reconstructing both posterior cruciate ligament (PCL) bundles and posterolateral corner (PLC) components is crucial. These structures work together, sharing loads to protect the knee from further damage.

Area of Science:

Orthopedic surgery
Biomechanics
Knee reconstruction

Background:

A comprehensive biomechanical understanding of combined posterior cruciate ligament (PCL) and posterolateral corner (PLC) knee reconstruction is needed.
Standardized surgical techniques are essential for restoring knee anatomy and preventing osteoarthritis.

Purpose of the Study:

To determine the in situ force patterns of individual components in a combined double-bundle PCL and PLC reconstruction.
To evaluate the biomechanical interaction between PCL bundles and PLC structures during knee flexion.

Main Methods:

Ten human cadaveric knees were tested using a robotic system.
Sequential cutting and reconstruction of PCL and PLC components were performed.
Knees were subjected to posterior tibial load and external tibial torque at various flexion angles.

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Last Updated: Jul 4, 2026

Arthroscopic Excision of Posterior Cruciate Ligament Cysts Using a Double Posteromedial Approach

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Published on: October 20, 2023

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Main Results:

Posterolateral corner deficiency increased anterolateral bundle forces at 30° (posterior tibial load) and 90° (external tibial torque).
No significant differences in in situ forces were observed between PCL bundles under any loading condition.
Popliteus tendon and popliteofibular ligament exhibited similar in situ forces across all flexion angles.

Conclusions:

The PCL bundles and PLC components function in a load-sharing, codominant manner, providing mutual protection.
The findings support the simultaneous reconstruction of both PCL bundles and both PLC components for optimal knee stability and function.