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Scientific Articles   |    
Percutaneous Distal Osteotomy of the Fifth Metatarsal for Correction of Bunionette
Bruno Magnan, MD; Elena Samaila, MD; Michele Merlini, MD; Manuel Bondi, MD; Silvio Mezzari, MD; Pietro Bartolozzi, MD
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Disclosure: None of the authors received payments or services, either directly or indirectly (i.e., via his or her institution), from a third party in support of any aspect of this work. None of the authors, or their institution(s), have had any financial relationship, in the thirty-six months prior to submission of this work, with any entity in the biomedical arena that could be perceived to influence or have the potential to influence what is written in this work. Also, no author has had any other relationships, or has engaged in any other activities, that could be perceived to influence or have the potential to influence what is written in this work. The complete Disclosures of Potential Conflicts of Interest submitted by authors are always provided with the online version of the article.

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Clinica Ortopedica Università di Verona, P.le L.A. Scuro 10, 37134 Verona, Italy. E-mail address for B. Magnan: brunomagnan@virgilio.it
Investigation performed at the Orthopaedic Department, University of Verona, Verona, Italy

Copyright © 2011 by The Journal of Bone and Joint Surgery, Inc.
J Bone Joint Surg Am, 2011 Nov 16;93(22):2116-2122. doi: 10.2106/JBJS.J.01177
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Abstract

Background: 

Distal osteotomy of the fifth metatarsal is indicated in the surgical treatment of bunionette and varus deformities of the fifth toe in patients with a valgus deviation of the fifth metatarsal. The aim of this study was to evaluate the results of a subcapital percutaneous osteotomy of the fifth metatarsal in the treatment of this disorder.

Methods: 

From 1996 to 2006, thirty consecutive percutaneous distal osteotomies of the fifth metatarsal were performed in twenty-one patients for the treatment of a painful prominence of the head of the fifth metatarsal. Combined procedures were performed, including a first metatarsal osteotomy in sixteen feet for hallux valgus treatment and a distal open osteotomy of the second metatarsal for painful dorsal dislocation of the second metatarsophalangeal joint in eight feet. The patients were assessed at a mean of ninety-six months with a radiographic and clinical protocol that made use of the American Orthopaedic Foot & Ankle Society (AOFAS) Lesser Toe Metatarsophalangeal-Interphalangeal Scale.

Results: 

The AOFAS score improved from a mean and standard deviation of 51.9 ± 10.2 points preoperatively to 98.4 ± 2.6 points at the time of final follow-up. In 73% of feet there was complete resolution of pain at the fifth metatarsophalangeal joint without any functional limitation (AOFAS score of 100). In 20% of the cases the AOFAS score was 95 points with some decrease in function and a need to use comfortable shoes. In the remaining 7% of patients the AOFAS score was 93 points with mildly asymptomatic malalignment. No nonunions or recurrences were observed.

Conclusions: 

The percutaneous procedure described here is a reliable technique to perform a distal transverse osteotomy of the fifth metatarsal to correct a painful varus fifth-toe deformity with prominence of the fifth metatarsal head. The clinical results are comparable with those reported with traditional open techniques, with the advantages of a minimally invasive surgical procedure, substantially shorter operating time, and a reduced risk of complications.

Level of Evidence: 

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

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    References

    Accreditation Statement
    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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