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Distal radius metaphyseal (DRM) fractures are very frequent childhood fractures. Whether additional percutaneous pinning improves the outcome remains controversial. In this review, we tried to systematically evaluate the effect of percutaneous pinning on re-displacement, secondary reduction, radiographs, function, and complications in children with displaced DRM fractures.PubMed, Medline, Embase, Cochrane Library, and Web of Science databases were explored systematically to identify randomized controlled trials (RCTs) and clinical controlled trials (CCTs) comparing cast immobilization alone or following reduction to additional percutaneous pinning in the treatment of pediatric displaced DRM fractures. Two reviewers independently screened eligible articles and extracted relevant information from each article. The methodological quality of eligible articles was evaluated using the Cochrane Collaboration risk assessment tool (RCTs) and modified Jadad scale (CCTs).A total of 4 RCTs and 3 CCTs met the inclusion criteria, with a total patient count of 1144 children. The results showed that additional percutaneous pinning significantly reduced the rate of re-placement (Chi-square tests, P < .001) and complications (Chi-square tests, P = .030). The superior results, both radiographically and functionally seemed to be temporary. No difference was found between the 2 groups after longer-term follow-up.This systematic review suggested that compared with casting following reduction, percutaneous pinning had a positive effect on maintaining the initial reduction and reducing fracture complication rate of displaced DRM fractures in children, but with no significant improvement in function and radiographic outcome at the long-term follow-up. We suggest clinicians think twice before percutaneous pinning of displaced pediatric DRM fractures.