Belastbarkeit von Kapsel- und Sehnengewebe

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Bibliographische Detailangaben
Englischer übersetzter Titel:Load capacity of capsular and tendinous tissue
Autor:Wilhelm, K.; Kreusser, T.
Erschienen in:Sportverletzung, Sportschaden
Veröffentlicht:4 (1990), 1, S. 14-21, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource Elektronische Ressource (online)
Sprache:Deutsch
ISSN:0932-0555, 1439-1236
DOI:10.1055/s-2007-993592
Schlagworte:
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Erfassungsnummer:PU199209044610
Quelle:BISp

Abstract des Autors

Aufgrund der genannten Untersuchungsergebnisse im makro-, mikro- und submikroskopischen Bereich von Kapsel- und Sehnengewebe sowie auch anhand eigener experimenteller Untersuchungen, vor allem hinsichtlich der Belastbarkeit und der chronischen Gewebsschaedigung, ergeben sich wesentlich hoehere Belastungswerte als bisher angenommen. So liegt die Rissfestigkeit bei statischer Beanspruchung um 50 , bei dynamischer Beanspruchung 100 hoeher als die meisten bisher bekannten Hoechstbelastbarkeitswerte. Die dynamische Rissfestigkeit uebersteigt dabei die statische um ein Drittel. Die Hoehe der Belastbarkeit nimmt mit dem Alter ab, das Maximum der Belastbarkeit liegt in der dritten Altersdekade. Die Rissfestigkeit steht in Abhaengigkeit vom kleinsten Querschnitt der Sehne. Querschnitt und Rissfestigkeit nehmen im Alter gesichert ab. Rechnerisch wie auch histologisch nachgewiesen, kann unter unguenstigen Belastungssituationen auch eine gesunde Sehne durchaus reissen und kann in einem gesunden Muskel-Sehnen-Knochensystem somit die eigentliche Schwachstelle darstellen. Verf.-Referat

Abstract des Autors

The data referred to in this article show that the load capacity values of capsular and tendinous tissue are significantly higher than had been assumed so far; this applies to the macroscopic as well as the microscopic and submicroscopic ranges and is also based on our own experimental studies, which were mainly focussed on load capacity and tissue damage. For example, the tear resistance to static load is 50 % higher and to dynamic load 100 % higher than most of the maximum load data known so far. Thus, the dynamic tear resistance exceeds the static resistance by one third. The maximum load capacity decreases with increasing age; the peak value is attained at about the third decade of life. Tear resistance is related to the smallest cross-section of the tendon. It has been safely established that cross-section and tear resistance decrease with advancing age. There is definite mathematical and histological proof that even a healthy tendon can tear under unfavourable load conditions and can thus well be the weakest link in a healthy muscle-tendon-bone System. This fact assumes increasing importance in these times of increasing leisure and sports activities practised by persons of all age brackets. The commonly used terms of “load” and “load capacity” thus acquire a new dimension. We know that the load exercised on a tendon is permanently increased especially in sports activities. We also know that load capacity can be promoted. Hence, it depends on us to learn how to master the functioning of the tendon and to develop measures to help to avoid acute and chronic tendon damage. What happened to Achilles is happening a thousand times over today (Fig. 13). We know he suffered a subcutaneous rupture of the calcaneal tendon, the powerful tendon at the back of the heel (the right heel was the only vulnerable part of his body). Achilles had been inactive for a long time, grieving about Agamemnon having taken away his beloved Briseis, and was thus in a completely untrained condition when he suddenly sprang to life again at the death of his best friend Patroclus, throwing himself furiously into the fray and challenging Hector, chasing him many times around Troy before conquering him. That in itself was a formidable feat! Not to be satisfied, he continued to rage against Troy. The fateful rupture of the tendon oecurred when he hurled a stone at Troy's gate. The ancients made a myth of incidents they could not explain, and blamed them on the gods. Today we can analyse much more sanely what really happened.