Orthopaedic Surgery

Answer 2 15%. Fithian et al3 evaluated epidemiologic factors associated with patellar dislocation and found that patients with a first-time dislocation had an average 17% incidence of instability over a 2- to 5-year follow-up period. Patients with a previous history of dislocation had a 49% recurrence rate. Garth et al4 also noted a 15% recurrence rate for patients with a first-time dislocation and a 40% redislocation rate in patients presenting with a history of prior dislocation. REFERENCES 3.  Fithian DC, Paxton EW, Stone ML, et al. Epidemiology and natural history of acute patellar dislocation. Am J Sports Med 2004;32:1114-21. Click here to return to the questions

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