Correction results of atypical clubfeet managed with modified Ponseti technique: A meta-analysis
Abstract
A meta-analysis validating the Modified Ponseti Technique for resistant, atypical clubfeet. While initial correction is universally achievable, the study quantifies the significantly higher burden of relapse and complications compared to idiopathic cases.
Mastering the Resistant Atypical Foot
Key Finding
"The Modified Ponseti technique achieved 100% initial correction, but relapse rates (19.8%) and complication rates (16.8%) remain roughly 4x higher than standard idiopathic clubfoot."
Background: Atypical (or complex) clubfeet present with distinct characteristics—short, stubby feet, deep plantar creases, and severe equinus—that resist standard Ponseti casting. These feet are prone to cast slippage and iatrogenic deformities. This meta-analysis aimed to benchmark the expected outcomes of the Modified Ponseti protocol to set realistic prognostic expectations.
Methods: The authors analyzed 10 studies comprising 240 patients (354 feet) with atypical/complex clubfeet. The intervention was the Modified Ponseti technique (abduction limited to 40°, knee flexed to 110°). Primary outcomes were the number of casts for correction and Percutaneous Achilles Tenotomy (PAT) rates. Secondary outcomes included relapse rates, complications, and the need for additional soft tissue surgery.
Results: Initial correction was achieved in all cases, requiring a mean of 6 casts. However, the pathology demanded aggressive intervention: 98.3% of cases required a tenotomy. The overall complication rate was high at 16.8% (primarily slippage and sores), and the relapse rate was 19.8% (95% CI 10.1-29.5%). Additionally, 7.2% of feet required further soft tissue releases beyond simple tenotomy.
Conclusion: The Modified Ponseti technique is the definitive standard for atypical clubfoot, guaranteeing initial correction. However, surgeons must counsel parents that this is a high-maintenance diagnosis: expect a significantly rockier course with higher risks of relapse and secondary surgery compared to routine cases.