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Logo for the Journal of Rehab R&D
Volume 42 Number 6, November/December 2005
Pages 809 — 820

Abstract - Foot and ankle ligament morphometry

Chimba Mkandawire, PhD;1-2 William R. Ledoux, PhD;1,3-4 Bruce J. Sangeorzan, MD;1,3 Randal P. Ching, PhD1,3-4*

1Department of Veterans Affairs Puget Sound Health Care System, Rehabilitation Research and Development Center
of Excellence for Limb Loss Prevention and Prosthetic Engineering, Seattle, WA; Departments of  2Bioengineering, 3Orthopaedics and Sports Medicine, and 4Mechanical Engineering, University of Washington, Seattle, WA
Abstract — This study primarily measured and established a morphometric spectrum of cross-sectional areas for foot and ankle ligaments with the use of a new freeze-fracture technique that was independent of ligament cross-sectional shape. Ligament morphometry measurements were made on a total of 121 bone-ligament-bone preparations that were harvested from 26 fresh (unembalmed) male cadaver feet. We used the traditional digital caliper method to measure length and the freeze-fracture technique to measure cross-sectional area. Cross-sectional area values ranged from 21.36 to 170.48 mm2 and length values from 5.01 to 37.45 mm. In addition, area-to-length ratios ranged from 0.60 to 27.02 mm. Compared with the freeze-fracture technique, the digital caliper method, which assumed that ligament cross-sectional shape was rectangular, resulted in an approximately 35% difference in cross-sectional area.
Key words: ankle, area, biomechanics, cadaver, calipers, foot, freeze-fracture, ligaments, measurement, models.

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