It usually possesses a median ridge that divides the proximal patella into medial and lateral facets, and the medial facet is generally smaller. The patellar tendon is mainly composed of rectus ...

All 80 patients had bone bruising of their lateral femoral condyle in a pattern consistent with transient patellar dislocation. In addition, patellar derangements were described in 40 of the patients.

The undersurface of the patella was evaluated using the Outerbridge Rating System [8] and the location of wear (medial or lateral facet or central ridge) was recorded. The Outerbridge Rating ...