Supraspinatus Tendons Have Different Mechanical Properties Across Sex

Journal of Biomechanical Engineering
K A BonillaLouis J Soslowsky

Abstract

Sex differences in the mechanical properties of different musculoskeletal tissues and their impact on tendon function and disease are becoming increasingly recognized. Tendon mechanical properties are influenced by the presence or absence of sex hormones and these effects appear to be tendon- or ligament-specific. The objective of this study was to determine how sex and hormone differences in rats affect supraspinatus tendon and muscle properties. We hypothesized that male supraspinatus tendons would have increased cross-sectional area but no differences in tendon material properties or muscle composition when compared to supraspinatus tendons from female or ovariectomized (OVX) female rats. Uninjured supraspinatus tendons and muscles from male, female, and OVX female rats were collected and mechanical and histological properties were determined. Our analysis demonstrated decreased dynamic modulus and increased hysteresis and cross-sectional area in male tendons. We found that male tendons exhibited decreased dynamic modulus (during low strain frequency sweep and high strain fatigue loading), increased hysteresis, and increased cross-sectional area compared to female and OVX female tendons. Despite robust mechanical differences...Continue Reading

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Citations

Aug 15, 2019·Connective Tissue Research·Brianne K ConnizzoAlan J Grodzinsky
Jan 22, 2021·Journal of Materials Science. Materials in Medicine·Anna SorushanovaDimitrios I Zeugolis
Nov 5, 2020·Annals of Biomedical Engineering·Julianne HuegelLouis J Soslowsky
Jul 18, 2021·Medical & Biological Engineering & Computing·Emily Newell, Mark Driscoll
Oct 23, 2021·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Ryan M CastileSpencer P Lake

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