The 10-Year Functional Outcome of Ponseti Treatment of Idiopathic and Arthrogrypotic Clubfeet With an Age-Matched Control.

Abstract

Background: The Ponseti method is accepted as an effective primary conservative treatment for idiopathic clubfoot (IC) using serial casting, percutaneous Achilles tenotomy, and prolonged bracing. The outcomes of its use in treating rigid clubfoot in arthrogryposis are unclear. This study assesses the outcomes of the Ponseti method in children with IC and arthrogrypotic clubfoot at an average age of 10 years.

Methods: Outcomes of the Ponseti method were retrospectively studied in ambulatory children ages 8.0 to 12.9 years in the gait lab between 2004 and 2024. Children were excluded due to the presence of nonidiopathic or nonarthrogryposis-related clubfoot and history of posteromedial release. The Ponseti treatment included serial casting and Achilles tenotomy in infancy, followed by night bracing until age 5 in both cohorts. Clubfoot groups were compared with typically developing children by analyses of foot pressure data, passive range of motion, Gross Motor Function Measure Dimension-D, and Pediatric Outcomes Data Collection Instrument. Surgical history was also recorded. A subsection of these children visited the gait lab at age 4.0 to 6.9 years (2003 to 2021) and data from their visits were abstracted for a longitudinal study.

Results: One hundred seventy-seven children were reviewed (48 with clubfoot associated with arthrogryposis, 129 with IC) with an average age of 9.4±0.9 years. Repeat surgical intervention was used in 33% of IC feet and 44% of arthrogrypotic clubfeet. Residual equinovarus and limitations in range of motion were present in both clubfoot groups compared with typically developing feet (P<0.05). The foot deformity and passive range of motion restrictions were more severe in children with arthrogrypotic clubfeet (P<0.05). The arthrogrypotic clubfoot group additionally exhibited limited gross motor and global function (P<0.001). In 5-year to 10-year comparisons, both subgroups showed more limitations in ankle motion but improvements in dynamic equinovarus deformity and function at age 10 years (P<0.05).

Conclusions: Despite residual deformity, children with idiopathic clubfoot achieve typical functional outcomes through Ponseti treatment. Children with arthrogrypotic clubfeet exhibit functional limitations, but the Ponseti method is effective in improving foot position while minimizing the need for surgical intervention.

Level of evidence: Level III-therapeutic studies-investigating the results of treatment.