The Journal of Bone and Joint Surgery (American). 2007;89:487-493.
doi:10.2106/JBJS.F.00169
© 2007 The Journal of Bone and Joint Surgery, Inc.
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 Pediatrics Test 12: Spring 2007 (publication date May 15, 2007; expiration ...
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Early Clubfoot Recurrence After Use of the Ponseti Method in a New Zealand Population

Geoffrey F. Haft, MD1, Cameron G. Walker, PhD2 and Haemish A. Crawford, FRACS3

1 Sioux Valley Clinic, Van Demark Orthopedic Specialists, 1210 West 18th Street, Suite G-01, Sioux Falls, SD 57104. E-mail address: haftg{at}mac.com
2 Department of Engineering Science, University of Auckland, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand. E-mail address: cwalker{at}math.auckland.ac.nz
3 Department of Paediatric Orthopaedics, Starship Children's Hospital, Private Bag 92 024, Park Road, Auckland 5, New Zealand. E-mail address: hcrawford{at}akldbonejointsurg.co.nz

Investigation performed at Starship Children's Hospital, Auckland, New Zealand

Disclosure: The authors did not receive any outside funding or grants in support of their research for or preparation of this work. Neither they nor a member of their immediate families received payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity. No commercial entity paid or directed, or agreed to pay or direct, any benefits to any research fund, foundation, division, center, clinical practice, or other charitable or nonprofit organization with which the authors, or a member of their immediate families, are affiliated or associated.

A commentary is available with the electronic versions of this article, on our web site (www.jbjs.org) and on our quarterly CD-ROM (call our subscription department, at 781-449-9780, to order the CD-ROM).

Background: Nonoperative treatment of idiopathic clubfoot has become increasingly accepted worldwide as the initial standard of care. The Ponseti method has become particularly popular as a result of published short and long-term success rates in North America. The purpose of the current study was to examine the early rate of clubfoot recurrence following the use of the Ponseti treatment method in a New Zealand population and to analyze patient characteristics to identify factors predictive of recurrence.

Methods: Fifty-one consecutive babies with a total of seventy-three clubfeet treated by the Ponseti technique were followed prospectively for a minimum of two years from the start of treatment. Recurrence, defined as the need for any subsequent operative treatment, was analyzed with respect to the severity at presentation, the time of presentation, the number of casts needed to obtain the initial correction, any family history of clubfoot, ethnicity, and the compliance with postcorrection abduction bracing. Recurrence was classified as minor, defined as requiring a tendon transfer or an Achilles tendon lengthening, or major, defined as requiring a full posterior or posteromedial surgical release to achieve a corrected plantigrade foot.

Results: Twenty-one (41%) of the fifty-one patients had a recurrence, which was major in twelve of them and minor in nine. The parents of twenty-six babies (51%) complied with the abduction bracing protocol, and only three of these children had a major recurrence. Compliance with abduction bracing was associated with the greatest risk reduction for recurrence (odds ratio, 0.2; p = 0.009). When the parents had not complied with the bracing protocol, the patient had a five times greater chance of having a recurrence. With the numbers studied, no significant relationships were found between recurrence and the severity at presentation, the time of presentation, the number of casts needed to obtain correction, ethnicity, or a family history of clubfoot.

Conclusions: Compliance with the postcorrection abduction bracing protocol is crucial to avoid recurrence of a clubfoot deformity treated with the Ponseti method. When the parents comply with the bracing protocol, the Ponseti method is very effective at maintaining a correction, although minor recurrences are still common. When the parents do not comply with the bracing protocol, many major and minor recurrences should be expected.

Level of Evidence: Prognostic Level II. See Instructions to Authors for a complete description of levels of evidence.


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