Patello-femoral joint

Patella is an ovoid sesamoid bone embedded in the Quadriceps muscle. Patello-femoral joint is part of the Knee joint. But functionally the joint is distinct from the condyloid tibio-femoral articulation.

Anatomy of the patella:

• patella is triangular with apex directed downwards

• anterior surface of the patella is gently convex

• deep  surface is only partially articulating and changes throughout the ROM of the knee.

• the joint surfaces are not very congruent. Upper3/4th part of the posterior surface is articular

• articular surface has a convex medial facet and a concave lateral facet



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