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Quantitative Geometry of the Distal First Metatarsal Axis Guide Concept
Meyr, Andrew J. Stern, Stephen F.
Meyr, Andrew J.
Stern, Stephen F.
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Journal article
Date
2009-01-01
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Department
Podiatric Surgery
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DOI
https://doi.org/10.3827/faoj.2009.0201.0001
Abstract
The axis guide concept was introduced as an intra-operative tool to assist the surgeon in estimating the transverse and sagittal plane motion of the capital fragment during lateral transposition of a distal first metatarsal osteotomy for the surgical correction of the hallux abductovalgus deformity. The intention of this investigation was an attempt to provide a quantitative estimate to the previously qualitative axis guide concept. The Law of Cosines was applied to the morphologic characteristics of a sawbone first metatarsal model. Measurements were calculated based on 1/4, 1/3, and 1/2 lateral transpositions of the capital fragment of the first metatarsal. An average of all measurements resulted in a change of the absolute first metatarsal position of 1mm for every 10˚ change in axis guide orientation in both the transverse and sagittal planes. It is the authors’ hope that this data can be used to further understanding of the perioperative evaluation and surgical correction of the hallux abductovalgus deformity.
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Citation
Meyr A, Stern S. Quantitative Geometry of the Distal First Metatarsal Axis Guide Concept. The Foot & Ankle Journal [Internet]. 2009 Jan 1;2(1). Available from: https://faoj.wordpress.com/2009/01/01/quantitative-geometry-of-the-distal-first-metatarsal-axis-guide-concept/ doi: 10.3827/faoj.2009.0201.0001
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International Foot & Ankle Foundation
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The Foot and Ankle Online Journal, Vol. 2
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