2003
DOI: 10.1114/1.1569267
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Effects of Creep and Cyclic Loading on the Mechanical Properties and Failure of Human Achilles Tendons

Abstract: The Achilles tendon is one of the most frequently injured tendons in humans, and yet the mechanisms underlying its injury are not well understood. This study examines the ex vivo mechanical behavior of excised human Achilles tendons to elucidate the relationships between mechanical loading and Achilles tendon injury. Eighteen tendons underwent creep testing at constant stresses from 35 to 75 MPa. Another 25 tendons underwent sinusoidal cyclic loading at 1 Hz between a minimum stress of 10 MPa and maximum stres… Show more

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Cited by 214 publications
(241 citation statements)
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“…Exercise may have induced an increased capacity of tenocytes to repair microdamage, but no analysis was performed on the metabolic activity of the cells within the tendon in this study. In addition, fatigue resistance is a difficult characteristic to measure objectively with biological relevance, although some attempts have been made in other species (31,47,63).…”
Section: Discussionmentioning
confidence: 99%
“…Exercise may have induced an increased capacity of tenocytes to repair microdamage, but no analysis was performed on the metabolic activity of the cells within the tendon in this study. In addition, fatigue resistance is a difficult characteristic to measure objectively with biological relevance, although some attempts have been made in other species (31,47,63).…”
Section: Discussionmentioning
confidence: 99%
“…While there is an active debate regarding the relative continuity/interconnectivity of collagen fibrils and how collagen fibrils are effectively cross-linked and/or interwoven to provide structural integrity (Provenzano and Vanderby, 2006), a large number of studies suggest that collagen fibrils are relatively short and assume a discontinuous fibril network (Birk et al, 1997;Dahners et al, 2000;Mosler et al, 1985;Thurmond and Trotter, 1994;Trotter and Koob, 1989). Thus tendon is widely modeled as a fiber reinforced composite material in which force is laterally transferred between neighboring fibrils (Ciarletta et al, 2008;Haut, 1986;Humphrey and Yin, 1987;Korhonen et al, 2003;Lanir, 1978;Mommersteeg et al, 1996;Preston and Meyer, 1971;Wren et al, 2003). However, the mechanism that governs lateral load transfer among collagen fibrils is largely unknown.…”
Section: Introductionmentioning
confidence: 99%
“…The material testing system is the most direct and valid method for assessing in-vitro tendon elastic properties [20,21]. However, this method cannot be applied in-vivo.…”
Section: Discussionmentioning
confidence: 99%