AANA19 Knee Access Pass-The Biomechanical Effects of Lateral Release on Lateral Patellar Displacement at Varying Flexion Angles-Dr. Jourdan Cancienne, M.D., PhD.

The Biomechanical Effects of Lateral Release on Lateral Patellar Displacement at Varying Flexion Angles-Dr. Jourdan Cancienne, M.D., PhD.

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Video Summary

This study quantitatively assessed the effect of limited lateral retinacular release on patellar lateral stability using cadaveric knees. Testing showed significant increases in lateral patellar displacement at all knee flexion angles after release, especially at full extension, with over 30% greater displacement compared to intact specimens. Unlike prior larger releases, this targeted approach better reflects modern anatomical understanding. Results suggest lateral release should not be routinely used for patellar instability correction, as it may increase instability and risk medial instability if isolated. Limitations include specimen age and assumed normal knee alignment. Caution is urged when combining this procedure with other treatments.

Keywords

patellar lateral stability

lateral retinacular release

cadaveric knee study

patellar displacement

patellar instability treatment