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Surgical treatment of calcaneal deformity in a select group of patients with myelomeningocele

Authors
 Kun Bo Park  ;  Hui Wan Park  ;  Sun Young Joo  ;  Hyun Woo Kim 
Citation
 Journal of Bone and Joint Surgery - American Volume, Vol.90A(10) : 2149-2159, 2008 
Journal Title
 Journal of Bone and Joint Surgery - American Volume 
ISSN
 0021-9355 
Issue Date
2008
MeSH
Adolescent ; Bone Diseases, Developmental/etiology ; Bone Diseases, Developmental/physiopathology ; Bone Diseases, Developmental/surgery* ; Calcaneus* ; Child ; Child, Preschool ; Cohort Studies ; Female ; Foot Deformities, Acquired/etiology ; Foot Deformities, Acquired/physiopathology ; Foot Deformities, Acquired/surgery* ; Gait/physiology ; Humans ; Lumbar Vertebrae ; Male ; Meningomyelocele/complications* ; Meningomyelocele/physiopathology ; Retrospective Studies ; Sacrum ; Tendon Transfer/methods* ; Treatment Outcome
Keywords
Adolescent ; Bone Diseases, Developmental/etiology ; Bone Diseases, Developmental/physiopathology ; Bone Diseases, Developmental/surgery* ; Calcaneus* ; Child ; Child, Preschool ; Cohort Studies ; Female ; Foot Deformities, Acquired/etiology ; Foot Deformities, Acquired/physiopathology ; Foot Deformities, Acquired/surgery* ; Gait/physiology ; Humans ; Lumbar Vertebrae ; Male ; Meningomyelocele/complications* ; Meningomyelocele/physiopathology ; Retrospective Studies ; Sacrum ; Tendon Transfer/methods* ; Treatment Outcome
Abstract
BACKGROUND: The surgical treatment of calcaneal deformity in patients with myelomeningocele has not been uniformly successful in correcting the deformity and preventing recurrence. The purpose of the present study was to examine the results of posterior transfer of the anterior tibial tendon with concurrent procedures in an attempt to balance the muscular forces on the foot and ankle and to obtain a plantigrade foot. We investigated whether surgery improved pressure distribution over the plantar surface of the foot and whether concurrent abnormal movements observed at the knee, hip, and pelvis influenced the surgical outcome. METHODS: Thirty-one feet in eighteen patients who were able to walk were included in the study. The mean age at the time of surgery was seven years and four months, and the mean duration of follow-up was forty-seven months. Eight patients were classified as having an L5-level myelomeningocele, and ten patients were classified as having a sacral level myelomeningocele. A tibialis anterior tendon transfer was performed in all patients, and accompanying osseous deformities were also corrected in twelve feet. Measurements on plain radiographs, the results of gait analyses, and dynamic foot pressures that were determined before surgery and at the time of the final follow-up were compared. RESULTS: No recurrence or worsening of the deformity was observed in any of the patients, and no other types of foot deformity developed after surgery. Postoperative kinematic studies showed a significant (p < 0.0001) increase in peak plantar flexion and a significant decrease in peak dorsiflexion force of the ankle in the stance phase of gait. Peak pressures under the forefoot and midfoot were increased after surgery, and the relative amount of weight-bearing on the heel as compared with the forefoot was shifted toward more equal weight-bearing. However, less improvement in foot-pressure distribution was observed in patients with increased pelvic rotation before surgery. Those patients also had decreased knee extension in stance phase and increased hip abduction and pelvic obliquity both before and after surgery in comparison with patients who had normal pelvic rotation. CONCLUSIONS: Appropriately combined corrective surgical procedures for the treatment of calcaneal deformity in patients with myelomeningocele can effectively reduce the pressure placed on the calcaneus, increase pressures in the forefoot and midfoot, and prevent recurrence of the calcaneal deformity. However, in the presence of excessive pelvic movement in the coronal and transverse planes and decreased knee extension in stance phase, adequate improvement in pressure distribution over the plantar surface of the foot is not likely to occur after this type of foot surgery. LEVEL OF EVIDENCE: Therapeutic Level IV. See Instructions to Authors for a complete description of levels of evidence.
Full Text
http://jbjs.org/content/90/10/2149
DOI
10.2106/JBJS.G.00729
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Hyun Woo(김현우) ORCID logo https://orcid.org/0000-0001-8576-1877
Park, Hui Wan(박희완)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/107188
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