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Patellofemoral dislocation

The word 'dislocation' implies that the two bones of a joint totally leave their normal relationship, and the joint assumes an abnormal position. So patellofemoral dislocation refers to this happening in the joint between the patella (kneecap) and the femur (thighbone), where the patella jumps completely out of the walls of the groove in the femur bone, and the joint looks horribly deformed.

This may occur without there having been an injury if the person was born or developed with abnormal joint anatomy. It may happen in a person with normal anaatomy as a consequence of a high speed injury, during which soft tissue restraints are torn (eg the medial patellofemoral ligament or MPFL).

The unstable kneecap (forum discussions and other resources)

09 Jul, 2014

In this paper, I have gathered together several papers and discussions about patellar instability from this site that may be useful...

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