Comparison of 2D-3D Measurements of Hallux and First Ray Sagittal Motion in Patients With and Without Hallux Valgus

Foot & Ankle International
Jessica E SwansonWard M Glasoe

Abstract

Clinicians base treatment decisions on measures of hallux and first ray motion in the management of first metatarsophalangeal joint disorders. Women account for a majority of the patients. This study assessed the reliability of a 2D approach for the measurements of sagittal motion, and compared the result to a Cardan (3D) angle criterion standard and evaluated how hallux valgus (bunion) deformity affected the comparisons. Twenty-nine women (controls n = 10; bunion n = 19) were examined using a retrospective repeated measures design. Weightbearing magnetic resonance (MR) images were acquired to replicate the position of the foot during the stance phase of gait. The images were reconstructed into virtual bone models using computer processes, whereby measures of hallux and first ray motion were represented by 2D and 3D methods of measurement. An examiner measured 2D motion on the image data sets using a goniometer, and reliability was assessed. The 3D Cardan angle result was derived from a matrix calculation. The 2D-3D comparison of measurements was evaluated with an analysis of variance (ANOVA) model across gait conditions, run separate for groups. The 2D measurement was reliable (ICC ≥ 0.98, SEM ≤ 0.89 degrees). There was no met...Continue Reading

References

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Citations

May 26, 2017·Foot & Ankle International·Elizabeth A CodyScott J Ellis
Mar 25, 2019·Foot & Ankle International·Ward M Glasoe, Thomas C Michaud
Apr 17, 2020·Sensors·Pedro V Munuera-MartínezGuillermo Lafuente-Sotillos
Aug 3, 2017·Journal of the American Podiatric Medical Association·Michael W RodriguezWard M Glasoe

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