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Comparison between surgical and nonsurgical treatment for primary patellar dislocations in adolescents: a systematic review and meta-analysis of comparative studies
Zhang K, Jiang H, Li J, Fu W
Orthopaedic Journal of Sports Medicine 2020 Sep;8(9):2325967120946446
systematic review

BACKGROUND: Whether surgical or nonsurgical management is more appropriate for primary patellar dislocations (PPDs) in adolescents (younger than 18 years) remains controversial. PURPOSE(S): To compare the clinical outcomes of surgical versus nonsurgical treatment for adolescents and children with PPDs. STUDY DESIGN: Systematic review; level of evidence 3. METHOD(S): There were 2 reviewers who independently searched the PubMed, Embase, Ovid, and Cochrane databases for English-language studies of randomized controlled trials (RCTs), quasi-RCTs, and observational studies comparing surgical with nonsurgical treatment for PPDs. The primary outcomes were redislocations, the Kujala score, and the Knee injury and Osteoarthritis Outcome Score (KOOS), and the secondary outcome was subsequent surgery. RESULT(S): A total of 6 studies were included in our systematic review and meta-analysis. Among patients younger than 18 years, surgery was associated with a lower redislocation rate compared with nonsurgical treatment within 5 years of treatment (risk ratio (RR) 0.58 (95% CI 0.37 to 0.91); p = 0.02; I2 = 47%) but not beyond 5 years (RR 0.80 (95% CI 0.59 to 1.07); p = 0.14; I2 = 34%). However, surgery resulted in worse Kujala and KOOS scores compared with nonsurgical treatment. Yet, the treatment difference between the 2 groups tended to decrease over time. CONCLUSION(S): The available evidence suggests that for adolescents with PPDs, surgery was superior to nonsurgical treatment in the short term to reduce the redislocation rate but resulted in poorer outcomes of knee function based on the Kujala and KOOS scores. However, the superiority of either surgical or nonsurgical treatment in adolescents did not appear to persist in the long term.

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