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Inicio Revista Española de Cirugía Ortopédica y Traumatología (English Edition) Behavior of the first cuneiform in the surgical correction of metatarsus adductu...
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Vol. 52. Issue 2.
Pages 84-93 (March - April 2008)
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Vol. 52. Issue 2.
Pages 84-93 (March - April 2008)
Original paper
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Behavior of the first cuneiform in the surgical correction of metatarsus adductus
Comportamiento de la primera cuña en la corrección quirúrgica del metatarso adducto
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J. Knörra,
Corresponding author
knorr.j@chu-toulouse.fr

Corresponding author: Service de Chirurgie Orthopédique et Traumatologie Pédiatrique. Hôpital des Enfants. 330 Avenue de Grande Bretagne. 31059 Toulouse.
, F. Accadbleda, J. Jégub, A. Abida, J. Sales De Gauzya, J.P. Cahuzaca
a Service de Chirurgie Orthopédique et Traumatologie Pédiatrique. Hôpital des Enfants. Centre Hospitalier Universitaire de Toulousse. Toulousse. France
b Service d’Epidemiologie. Centre Hospitalier Universitaire de Toulousse. Toulousse. France
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Purpose

Metatarsus adductus is an adduction deformity of the forefoot. Our purpose is to uphold the claim that the main anomaly is to be found on the cuneiform side of the cuneo-metatarsal joint and that the growth of the medial cuneiform is fundamental for correction further to capsulotomy.

Materials and methods

This is a radiological study of 23 children with idiopathic or clubfoot-related metatarsus adductus subjected between 1982 and 2000 to a release of the cuneiform metatarsal joint.

X-rays were taken of the 30 operated feet and of 12 contralateral feet used as controls. The following measurements were made: cuneiform-metatarsal angle, distal inclination angle of the medial cuneiform bone, angle formed between the latter surface and the first metatarsal and the proximal articular angle of the first metatarsal. The mean pre-op, immediate post-op and post-op final values of these angles were compared using the relevant statistical tests.

Results

As regards idiopathic metatarsus adductus, the cuneiform metatarsal angle went from a preop value of 150.4° to 170.2° at the end of follow-up; the distal inclination angle of the medial cuneiform went from 62° to 81.1°; and the angle formed between the latter surface and the first metatarsal and the proximal articular angle of the first metatarsal went from 88.4° to 89.1°.

With respect to clubfoot-related metatarsus adductus, the cuneiform metatarsal angle went from a preop value of 155.3° to 169.7°, the distal inclination angle of the medial cuneiform went from 61.9° to 79.7°, and the angle formed between the latter surface and the first metatarsal and the proximal articular angle of the first metatarsal went from 88.3° to 90°. On the healthy side, the angle values showed virtually no changes.

Conclusions

The obliqueness of the medial cuneiform-metatarsal joint is closely related to metatarsus adductus. Post-surgical correction also takes place at the expense of this bone, which tends to fill the space created by the capsulotomy.

Key words:
metatarsus adductus
medial cuneiformmetatarsal obliqueness
first cuneiform bone
capsulotomy
Objetivo

El metatarso adducto (MTA) es una deformación en adducción del antepié. Nuestro objetivo es apoyar la hipótesis por la cual la principal anomalía se encuentra en el lado cuneiforme de la articulación cuneo-metatarsiana, y que el crecimiento de la primera cuña es fundamental en la corrección tras la capsulotomía.

Material y método

Se trata de un estudio radiológico realizado con 23 niños con MTA idiopático o secundario a pie zambo, operados entre los años 1982 y 2000, con liberación de la articulación cuneo-metatarsiana. Se realizaron radiografías de los 30 pies operados, y de 12 pies contralaterales utilizados como controles, con las siguientes mediciones: ángulo cuneo-metatarsiano (FMCA), ángulo de inclinación distal de la primera cuña (DCAA), ángulo entre esta superficie y la del primer metatarsiano (PENTE) y ángulo proximal articular del primer metatarsiano (PMAA). Se compararon las medias de estos ángulos tomadas en pre, post-operatorio inmediato y final del seguimiento, mediante los pertinentes tests estadísticos.

Resultados

Respecto al MTA idiopático, el FMCA aumentó de 150,4° en el preoperatorio a 170,2° al final, el DCAA pasó de 62° a 81,1°, y el PMAA de 88,4° a 89,1°. Respecto al MTA secundario a pie zambo, el FMCA aumentó de 155,3° a 169,7°, el DCAA pasó de 61,9° a 79,7°, y el PMAA de 88,3° a 90°. En el lado sano los ángulos apenas se modificaron.

Conclusiones

La oblicuidad de la articulación cuneo-metatarsiana medial está estrechamente relacionada con el metatarso adducto. La corrección post-quirúrgica se hace también a expensas de este hueso, que tiende a rellenar el espacio creado por la capsulotomía.

Palabras clave:
metatarso adducto
oblicuidad cuneometatarsiana medial
primera cuña
capsulotomía
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Copyright © 2008. Sociedad Española de Cirugía Ortopédica y Traumatología (SECOT). All rights reserved
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