Ponseti Method After Walking Age - A Multi-Centric Study of 429 Feet: Results, Possible Treatment Modifications and Outcomes According to Age Groups.

Objective: Ponseti method is suitable to treat neglected clubfoot after the walking age. However, limited evidence exists on its effectiveness, outcomes and rate of relapse. Methods: 429 clubfeet in 303 patients with no previous treatment and older than one-year were treated with the Ponseti method in 15 centers from seven countries. The median age at treatment onset was three years, and the median follow-up of 1.3 years. Standard Ponseti Method was applied. Bilateral abduction brace was recommended after casting. Patients were classified according to group ages (<2 years, 2-4 years, >4-8years, >8 years). Feet were evaluated by Pirani score and a clinical outcome classification. Relapses were described in a subset of 103 clubfeet with minimal follow-up of two years. Results: Ponseti method was able to correct the deformity in 87% (373 of 429) of neglected clubfeet, after a mean of 6.8 casts. Residual equinus was treated with percutaneous sectioning of the Achilles tendon in 356 (83%) of 429 clubfeet. A bilateral foot abduction brace was prescribed and used in 70% of children. Relapses occurred in 31% (32 of 103) of clubfeet and were associated with age less than 4 years at treatment onset, and bracing noncompliance. Conclusion: The Ponseti method is effective to correct neglected clubfeet. Relapses occurred in one-third of clubfeet, mainly in children younger than four years and in noncompliance with the brace. Our study reinforces the recommendation for the Ponseti method with no major modification to treat neglected clubfoot in patients after walking age.