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Posterior cruciate ligament architecture: evaluation under microsurgical dissection
C A Makris1, A D Georgoulis, C D Papageorgiou
1Department of Orthopaedic Surgery, University of Ioannina Medical School, Ioannina, Greece. grakos@otenet.gr
Summary
The posterior cruciate ligament (PCL) has a complex anatomy with four distinct fiber regions, not just two bands. Understanding these PCL fiber regions is crucial for accurate diagnosis and treatment.
Area of Science:
- Orthopedic surgery
- Anatomy
- Biomechanics
Background:
- The posterior cruciate ligament (PCL) is vital for knee stability.
- Traditional understanding describes the PCL as two distinct bands.
- A more detailed anatomical description may improve clinical understanding.
Purpose of the Study:
- To verify the fiber anatomy of the PCL.
- To measure PCL dimensions and attachment sites.
- To test the hypothesis that PCL anatomy is more complex than previously described.
Main Methods:
- Microdissection of 24 fresh-frozen cadaveric knees using microscopy.
- Measurement of PCL dimensions with a micrometer.
- Observation of fiber region behavior during simulated joint motion.
Main Results:
- Four distinct PCL fiber regions were identified: anterior, central, posterior-longitudinal, and posterior-oblique.
- These regions were anatomically separable but functionally distinct.
- Different fiber regions exhibited varying isometricity and tension patterns throughout knee flexion, with anterior fibers being most non-isometric and posterior fibers most isometric.
Conclusions:
- The PCL's complex, multi-regional anatomy has significant implications for arthroscopic evaluation.
- This detailed anatomical knowledge aids in interpreting findings from anterior and posterior lateral portals.
- Understanding PCL fiber function is essential for selecting appropriate PCL treatments.