New aspects of the etiology of tendon rupture

Knörzer, E.; Folkhard, W.; Geercken, W.; Boschert, C.; Koch, Michel H. J.; Hilbert, B. J.; Krahl, H; Mosler, E.; Nemetschek-Gansler, H.; Nemetschek, Th.

doi:10.1007/bf00455845

Cited by 52 publications

(5 citation statements)

References 8 publications

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“…Recent investigations suggest that a significant cause of rupture of the Achilles tendon m a y be repeated microtrauma [9,11,19]. Experiments have shown that during stress structural disturbances with sliding of the fibrous tissue takes place before rupture.…”

Section: Discussionmentioning

confidence: 99%

The blood supply of the Achilles tendon

Schmidt-Rohlfing

Schneider³

et al. 1992

International Orthopaedics

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Section: Discussionmentioning

confidence: 99%

The blood supply of the Achilles tendon

Schmidt-Rohlfing

Schneider³

et al. 1992

International Orthopaedics

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“…The manifestation of tendinopathy is commonly ascribed to the progression of cumulative microtrauma to higher structural levels of the tissue and successive matrix breakdown (Kannus, 1997 ; Cook and Purdam, 2009 ). The degenerative cascade might also be related to the discontinued mechanotransduction of ruptured fibrils (Knörzer et al, 1986 ) and the associated catabolic responses of under-stimulated fibroblasts (Arnoczky et al, 2007 ). As both scenarios (i.e., mechanical over- or understimulation) are based on initial strain-induced damage, it seems plausible that an imbalanced adaptation of muscle and tendon could increase the risk of overload-induced tendinopathy.…”

Section: Implications and Concepts For Preventionmentioning

confidence: 99%

Imbalances in the Development of Muscle and Tendon as Risk Factor for Tendinopathies in Youth Athletes: A Review of Current Evidence and Concepts of Prevention

2017

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Tendons feature the crucial role to transmit the forces exerted by the muscles to the skeleton. Thus, an increase of the force generating capacity of a muscle needs to go in line with a corresponding modulation of the mechanical properties of the associated tendon to avoid potential harm to the integrity of the tendinous tissue. However, as summarized in the present narrative review, muscle and tendon differ with regard to both the time course of adaptation to mechanical loading as well as the responsiveness to certain types of mechanical stimulation. Plyometric loading, for example, seems to be a more potent stimulus for muscle compared to tendon adaptation. In growing athletes, the increased levels of circulating sex hormones might additionally augment an imbalanced development of muscle strength and tendon mechanical properties, which could potentially relate to the increasing incidence of tendon overload injuries that has been indicated for adolescence. In fact, increased tendon stress and strain due to a non-uniform musculotendinous development has been observed recently in adolescent volleyball athletes, a high-risk group for tendinopathy. These findings highlight the importance to deepen the current understanding of the interaction of loading and maturation and demonstrate the need for the development of preventive strategies. Therefore, this review concludes with an evidence-based concept for a specific loading program for increasing tendon stiffness, which could be implemented in the training regimen of young athletes at risk for tendinopathy. This program incorporates five sets of four contractions with an intensity of 85–90% of the isometric voluntary maximum and a movement/contraction duration that provides 3 s of high magnitude tendon strain.

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“…However, especially in the case of modeling arterial failure, a phenomenological model for anisotropic damage is limiting. In this study, we implemented an elastoplastic formulation of collagen fiber damage based on observations made during uniaxial tension experiments and reported studies on tendons [48, 49].…”

Section: Discussionmentioning

confidence: 99%

Failure properties and microstructure of porcine aortic adventitia: fiber level damage vs tissue failure

Ayyalasomayajula

Pierrat

Badel

2023

Preprint

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Aortic aneurysm rupture is a sudden local event with high mortality. It is generally accepted that the adventitia acts as the final barrier protecting the aorta from over-expansion. Currently, the knowledge of microscopic structural determinants of the tissue's mechanical response and failure is very limited. The purpose of this study is to provide data on the directional failure properties of the adventitia, combined with micro-structural imaging and structure based constitutive modeling to quantify fiber-scale rupture criteria. Eleven healthy porcine aortas were used in this study. Cylindrical portions of the abdominal section were excised, cut-open longitudinally, the medial and adventitial layers separated methodically. Picrosirius red staining was used to image the collagen fiber morphology via an optical microscope. Subsequently, dog-bone shaped specimens were subjected to uniaxial testing until failure while being recorded by a Nikon digital camera. A fiber-scale damage model was utilized to explain the tissue-scale failure. The ultimate tensile stress in the circumferential and longitudinal directions were recorded to be 0.96 +\- 0.29 MPa and 0.85 +\- 0.36 MPa respectively. Meanwhile, the ultimate stretch to failure in the circumferential and longitudinal directions were recorded to be 1.72 +\- 0.16 and 1.88 +\- 0.13 respectively. Further, correlation between the failure properties of the tissue and mean fiber orientation have been reported. Finally, the critical fiber stretch for damage initiation and eventual tissue failure were identified to be 1.19 +\- 0.07 and 1.24 +\- 0.05 for circumferential and longitudinal specimens respectively. Our approach provides valuable insight into the (patho)physiological mechanical role of collagen fibers at different loading states. This study is useful in enhancing the utilization of structurally motivated material models for predicting arterial tissue failure.

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New aspects of the etiology of tendon rupture

Cited by 52 publications

References 8 publications

The blood supply of the Achilles tendon

The blood supply of the Achilles tendon

Imbalances in the Development of Muscle and Tendon as Risk Factor for Tendinopathies in Youth Athletes: A Review of Current Evidence and Concepts of Prevention

Failure properties and microstructure of porcine aortic adventitia: fiber level damage vs tissue failure

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