The term “Patellar instability” encompasses not only symptomatic patellar instability but also dislocations as well as subluxations. The management of patellar instability requires a thorough understanding of the factors which are involved in providing patellar stability and the factors which cause instability. For assessing patellar instability various clinical examinations have been advocated. Reduction of patellar dislocation is an easy, safe and simple. Surgery is indicated in the presence of correctable and defined anatomical abnormalities. This is done only after adequate rehabilitation procedures have failed to help the patient regain functional control of their knees. Unfortunately none of these measures is specifically tailor made for patellar instability. The management of patellar instability continues to evolve and improve. Non operative management is still recommended for primary acute patellar dislocation. Once conservative options have failed the surgical management is specifically based on the underlying pathological condition. 

Keywords: Patellar Instability; Trochleoplasty; Medial Patellofemoral Ligament.