Mechanical comparison of the Youngswick, sagittal V, and modified Weil osteotomies for hallux rigidus in a sawbone model

The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons
Laura LaMarStuart Wertheimer

Abstract

The purpose of this study was to compare the mechanical properties of 3 osteotomies often used for hallux rigidus. Maximum load, failure energy, stiffness, and fracture pattern were determined for 3 different test models as well as a control group. Twenty-eight first metatarsal polyurethane sawbone models were equally divided into 4 groups. The osteotomy groups tested consisted of a Youngswick, sagittal V, and modified Weil-type osteotomy of the first metatarsal. Each osteotomy was fixated with a 2.7-mm cortical screw, all 16 mm in length, and a small diameter smooth wire, both placed perpendicular to the osteotomy. Each model was then loaded to failure in a servo-hydraulic material testing machine. Results for maximum load to failure for all 4 constructs showed a mean range of 15.1 to 33.7 N, a mean energy to failure ranging from 0.04 to 0.8 J, and stiffness from 1.5 to 3.4 N/mm. Significant differences in peak load and stiffness (P = .015 for peak load, P = .025 for stiffness) were found between the sagittal V group versus the control and between the modified Weil and sagittal V group (P = .037 for peak load, P = .017 for stiffness). There were no significant differences in the energy to failure between the 4 groups (P > .083...Continue Reading

References

Dec 23, 2003·The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons·Keith JacobsonMatthew S Rockett
Jun 11, 2004·The Journal of Arthroplasty·Richard S Laskin, Burak Beksac
Apr 16, 2005·Foot and Ankle Clinics·K-H KristenS H Weitzel

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Citations

Oct 30, 2012·The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons·Todd B Haddon, Stephan J LaPointe
Jun 15, 2011·Clinics in Podiatric Medicine and Surgery·Brian L Freeman, Mark A Hardy
Nov 3, 2010·The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons·Thomas S Roukis

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