Patellar Instability

Abstract

Patellar instability is defined as abnormal, clinically symptomatic, lateral or, in rare cases, medial translation of the patella out of the trochlear groove. Instability includes dislocations as well as subluxations, both of which can be either traumatic or atraumatic. One of the considerations in the management of patellar instability is whether the instability is due to an acute patellar dislocation or chronic/recurrent instability. The article reviews the pathophysiology and clinical presentation of patellar instability and reviews the management options for acute and for chronic/recurrent instability. Two surgical techniques are reviewed in detail: anteromedialization and MPFL reconstruction. Video is available.

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