The medial patellar retinaculum contains the MPFL as its primary component, connecting the medial patella to the medial joint capsule. Torn in lateral patellar dislocation.
| Origin | Vastus medialis aponeurosis and the medial femoral epicondyle region |
|---|---|
| Insertion | Medial border of the patella and the medial tibial condyle |
Provides the primary medial patellar constraint through the MPFL, transmits VMO force to the patella, and is disrupted in lateral patellar dislocation.
Medial retinaculum tear with osteochondral lesions of medial patella and lateral femoral condyle is the classic triad of acute patellar dislocation. MPFL reconstruction is the standard for recurrent instability.
First-time dislocation tearing the medial retinaculum and MPFL with osteochondral injuries, managed conservatively first event, reconstructed for recurrence.
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