Outcome and Prognosis
Approximately 50% of clubfeet in newborns can be corrected nonoperatively. Ponseti reports an 89% success rate using his technique (including an Achilles tenotomy). Others report success rates of 10-35%. Most series report 75-90% satisfactory results of operative treatment (appearance and function of the foot). The amount of motion in the joints of the foot and ankle correlates with the degree of patient satisfaction.21,22,23
Satisfactory results were obtained in 81% of cases, and the range of ankle movement was a major factor in determining the functional result, which again was influenced by the degree of talar dome flattening (suggesting that the primary bone deformity present at birth dictates the eventual result of treatment). Forty-four percent of patients had no dorsiflexion beyond neutral, and 38% of patients required further surgery (nearly two thirds of these were bony procedures).
Recurrence rates of deformity were reported at around 25%, with a range of 10-50%. Menelaus reported a 38% recurrence rate.24,25
The best results were obtained with children older than 3-4 months with a foot large enough to perform the surgery without compromise (longer than 8 cm, as specified by Simons26,27 ). The age at operation is directly related to the result. Less than satisfactory results may be associated with overcorrection, which occurs in approximately 15% of cases.
Previous surgery seems to have a deleterious effect on the result.
Future and Controversies
As small infants with operated clubfeet have grown into heavy adults, they have been prone to painful stiff feet, despite good correction.
Deitz and Cooper published a 30-year follow-up study of patients treated with the Ponseti method.28 These cases had comparatively pain-free supple feet. The Ponseti method is gaining mainstream acceptance as evidenced by the emergence of Ponseti clubfeet centers at major teaching hospitals across the United States.
Of the patients who have been monitored long term, those who are heavy and those in jobs involving long periods on their feet (especially performing manual labor) were found to be more likely to have painful feet. This correlated with the trend seen in the general population at large.
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References
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Further Reading
Keywords
congenital talipes equinovarus, CTEV, rockerbottom foot, rockerbottom deformity, foot deformity, clubfeet, clubfoot surgery
Follow-up: Clubfoot