Several features of the tendon-to-bone attachment were examined allometrically to determine load transfer mechanisms. The humeral head diameter increased geometrically with animal mass. Area of the attachment site exhibited a near isometric increase with muscle physiological cross section. In contrast, the interfacial roughness as well as the mineral gradient width demonstrated a hypoallometric relationship with physiologic cross-sectional area (PCSA). The isometric increase in attachment area indicates that as muscle forces increase, the attachment area increases accordingly, thus maintaining a constant interfacial stress. Due to the presence of constant stresses at the attachment, the micrometer-scale features may not need to vary with increasing load.
Allometry of the Tendon Enthesis: Mechanisms of Load Transfer Between Tendon and Bone
Department of Orthopedic Surgery,
New York, NY 10032;
New York, NY 10032
Manuscript received January 13, 2015; final manuscript received September 1, 2015; published online September 23, 2015. Assoc. Editor: Silvia Blemker.
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Deymier-Black, A. C., Pasteris, J. D., Genin, G. M., and Thomopoulos, S. (September 23, 2015). "Allometry of the Tendon Enthesis: Mechanisms of Load Transfer Between Tendon and Bone." ASME. J Biomech Eng. November 2015; 137(11): 111005. https://doi.org/10.1115/1.4031571
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