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Long-Term Results of the “Horseman” Procedure for Severe Idiopathic Flatfoot in Children: A Retrospective Analysis of 41 Consecutive Cases With Mean 8.9 Year Duration of Follow-Up JFAS Article in Press
The “horseman” procedure is a surgical technique used to correct the talocalcaneal joint displacement of severe idiopathic flatfoot in children while maintaining the reduction with a temporary talocalcaneal screw. While this technique has been used since the early 1960s, very little has been reported on its results. Our objectives were to estimate the correction, functional results, and postoperative complications of the “horseman” procedure. We conducted a retrospective study on 23 consecutive patients (41 cases) who underwent the “horseman” procedure for a talocalcaneal joint displacement. Mean follow-up was 8.9 (range 1 to 28) years, and 8 patients (12 feet) had reached bone maturity at last follow-up. Mean age at surgery was 6.6 (range 4 to 9.5) years. At last follow-up, all the patients were asymptomatic except 2 [8.7%] (4 [9.8%] cases). The talocalcaneal divergence on anteroposterior and lateral radiographic views was reduced by 8.9° and 11.4°, respectively, after the surgery, and the correction was maintained with loss of 0.7° and 2.9°, respectively, at final follow-up. The talonavicular coverage angle was reduced by 25° without loss of correction at last follow-up. The calcaneal pitch angle did not change after the surgery. Mean American Orthopedic Foot and Ankle Society score increased from 88.7 of 100 (63 of 100 to 93 of 100) preoperatively to 99 of 100 (97 to 100 of 100) at last follow-up. No major complication occurred. The “horseman” procedure allows an immediate and lasting correction of severe idiopathic flatfoot in children
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