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The purposes of this study were to evaluate the outcome of pediatric patients who have undergone Maxwell-Brancheau arthroereisis (MBA) subtalar implants for the treatment of painful pediatric flatfoot deformities. In a retrospective study, 39 patients (68 feet) were evaluated clinically and radiographically. The mean age of the patients was 12 years (range, 6-16 years). The mean period of follow-up was 24 months (range, 6-61 months). Statistical evaluation was performed on all radiographic measurements. Additional surgical procedures (gastrocnemius recession, Achilles tendon lengthening, Kidner posterior tibial tendon advancement) were performed in 22 of 68 feet. There were 10 (15%) complications, which consisted of 10 reoperations in 10 feet. Implants were exchanged in 9 feet because of implant migration, undercorrection, and overcorrection. There was 1 reoperation (in 1 foot) for implant removal because of persistent sinus tarsi pain. Radiographic evaluation demonstrated an improvement of all parameters determined. The parameters that were evaluated include talonavicular joint coverage, as well as lateral and anterior-posterior talocalcaneal angles. There were significant changes noted in pre- and postoperative measurements (P < .001). The MBA implant is effective for the correction of painful, flexible flatfoot deformity in children in short-term follow-up. However, this is a multiplanar deformity, and additional procedures may be needed in addition to the MBA.

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