Nonoperative Treatment of Patellar Instability

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The treatment of patellar instability is challenging and typically begins with nonoperative methods. Clinical decisions are made on an individual basis and may vary according to a number of factors. First-time patellar dislocations most commonly occur during sports participation. Initial evaluation, including patient history, physical examination, and appropriate imaging, determines care. Although nonoperative treatment consists primarily of regressive immobilization and physical therapy, there is little evidence to support particular protocols for either. Factors that may contraindicate nonoperative treatment include osteochondral lesions and recurrent instability. In these cases, surgery is considered. Reported recurrence rates after nonoperative treatment of acute patellar dislocation are 15% to 44%. Well-designed studies are needed to determine not only the outcomes of nonoperative versus surgical treatment of patellar instability but also the risk factors that may predict poor outcomes in either group.

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