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Archives of Orthopaedic and Trauma Surgery

Erschienen in:

28.03.2023 | Orthopaedic Surgery

Minimally invasive Chevron Akin (MICA) osteotomy for severe hallux valgus

verfasst von: Gustavo Araujo Nunes, Kepler Alencar Mendes de Carvalho, Gabriel Ferraz Ferreira, Miguel Viana Pereira Filho, Andre Donato Baptista, Roberto Zambelli, Jordi Vega

Erschienen in: Archives of Orthopaedic and Trauma Surgery | Ausgabe 9/2023

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Abstract

Introduction

The minimally invasive Chevron Akin (MICA) osteotomy has been widely used to treat hallux valgus (HV). The purpose of this study was to present a case series of patients with severe HV undergoing surgical treatment using the MICA procedure and to evaluate the clinical and radiographic outcomes.

Materials and methods

Retrospective study including 60 consecutive feet (52 patients) undergoing MICA for severe HV. The data were collected pre- and post-operatively at the last follow-up. Patients were clinically evaluated by the visual analog pain scale (VAS) and AOFAS hallux MTP-IP score. Radiographic assessments included measurements of hallux valgus angle (HVA), intermetatarsal angle (IMA), metatarsal (MT) length, distal metatarsal articular angle (DMAA), and plantar translation of MT head. The complications were recorded during the follow-up.

Results

The mean age was 59.9 years, and the mean follow-up was 20.5 months. The average AOFAS increased from 41.2 to 90.9 points, and the VAS from 8.1 to 1.3 at the last follow-up. The average HVA decreased from 41.2º to 11.6º, the IMA from 17.1º to 6.9º, and the DMAA from 17.9º to 7.8º. The average shortening of the first metatarsal and the plantar translation of the MT head was 5.1 mm and 2.8 mm, respectively. The most observed complication was hardware discomfort, observed in 5 feet (8.3%). There were two cases of recurrence (3.3%).

Conclusion

MICA technique was demonstrated in this series of cases to be an effective procedure for severe HV, with a low rate of recurrence and an acceptable rate of complications.

Level of evidence

IV; case series.

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Titel: Minimally invasive Chevron Akin (MICA) osteotomy for severe hallux valgus
verfasst von: Gustavo Araujo Nunes
Kepler Alencar Mendes de Carvalho
Gabriel Ferraz Ferreira
Miguel Viana Pereira Filho
Andre Donato Baptista
Roberto Zambelli
Jordi Vega
Publikationsdatum: 28.03.2023
Verlag: Springer Berlin Heidelberg
Erschienen in: Archives of Orthopaedic and Trauma Surgery / Ausgabe 9/2023
Print ISSN: 0936-8051
Elektronische ISSN: 1434-3916
DOI: https://doi.org/10.1007/s00402-023-04849-3

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Minimally invasive Chevron Akin (MICA) osteotomy for severe hallux valgus