Hi Mindy,
I'm sorry your son is having difficulty .. it must be hard to have it happen all of a sudden after so many good years.. It's great that he's so active.
I have seen one journal article which mentioned a late relapse .. here's the abstract.
"Clin Orthop Relat Res. 2003 Jun;(411):188-92. Related Articles, Links
Late recurrence of clubfoot deformity: a 45-year followup.
Dobbs MB, Corley CL, Morcuende JA, Ponseti IV.
Washington University School of Medicine, Department of Orthopaedic Surgery, St. Louis, MO 63110, USA. mattdobbs@earthlink.net
Idiopathic clubfoot is one of the most common congenital deformities. Regardless of the mode of treatment, clubfoot has a tendency to relapse until the age of 5 years. Relapses are rare in patients after 5 years of age. A 45-year followup of a patient with idiopathic clubfoot treated as a newborn with the Ponseti method is reported. The patient had both clubfeet well-corrected as seen clinically and radiographically with this method. However, recurrent deformities developed bilaterally when the patient was 8 years old. Because of the late recurrence of this deformity, the patient had a thorough neurologic evaluation, which was normal. Treating physicians should be aware of the possibility of late recurrence in patients who have had complete correction of their clubfoot deformity."
It doesn't say anything further in the abstract.. but maybe you could get a full copy of the article, or even contact Dr. Dobbs.
It's possible that a tendon transfer would be helpful.. there's information on that procedure below:
Link to a messageboard post including text about Dr. Ponseti's 2001 article regarding relapses:
http://groups.yahoo.com/group/nosurgery4clubfoot/message/13223
Another post on relapses, including info from Global Health booklet:
http://health.groups.yahoo.com/group/nosurgery4clubfoot/message/20810
The Global Health booklet on clubfoot treatment. See page 26 for info on ATTT. There are even pictures showing the procedure being done:
http://www.global-help.org/publications/cf-english.pdf
I don't know if this helped or not, but wanted to respond.. I hope you are able to figure something out and get everything back on track.
Best wishes,
Teresa and Claire
age 4 1/2, left cf