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Distal Chevron Osteotomy Increases Anatomic Intermetatarsal Angle in Hallux Valgus by Jeremy Y. Chan; Naudereh Noori; Stephanie Chen; Glenn B. Pfeffer; Timothy P. Charlton; David B. Thordarson is a Medicine article available to read on EtoBox.

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## Background: Distal chevron metatarsal osteotomy (DCO) is a common technique to address hallux valgus (HV), which involves coronal translation of the capital fragment resulting in a nonanatomic first metatarsal. The purpose of this study was to evaluate the radiographic effect of the DCO on the anatomic vs the mechanical axis of the first metatarsal. Our hypothesis was that patients undergoing DCO would have improvement in the mechanical metatarsal axis but worsening of the anatomic axis. ## Methods: This was a retrospective case series of consecutive patients who underwent DCO for HV. The primary outcomes were the change in anatomic first–second intermetatarsal angle (a1-2IMA) vs mechanical first–second intermetatarsal angle (m1-2IMA). Secondary outcomes included the change in hallux valgus angle (HVA) and medial sesamoid position. ## Results: 40 feet were analyzed with a mean follow-up of 21.2 weeks. The a1-2IMA increased significantly (mean, 4.1 degrees) whereas the m1-2IMA decreased significantly (mean, 4.6 degrees) following DCO. There was a significant improvement in HVA (mean, 12.5 degrees). Medial sesamoid position was improved in 21 feet (52.5%). Patients with no improve

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Author

Jeremy Y. Chan; Naudereh Noori; Stephanie Chen; Glenn B. Pfeffer; Timothy P. Charlton; David B. Thordarson

Publisher

SAGE Publications

Published

2020

Language

EN

Field

Medicine (Health Sciences)