Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/344330
Type: Artigo
Title: Static tensioning promotes hamstring tendons force relaxation more reliably than cycling tensioning
Author: Piedade, Sergio Rocha
Dal Fabbro, Inacio Maria
Mischan, Martha Maria
Piedade, Cezar, Jr.
Maffulli, Nicola
Abstract: Graft elongation might be a major reason for increased anterior laxity after anterior cruciate ligament (ACL) reconstruction. This study analyzed the force relaxation values and their stabilization when single strands of the gracilis and semitendinosus tendons underwent cyclic and static tensioning at 2.5% strain level, and compared the efficiency of static and cyclic tensioning in promoting force relaxation. Methods: Eighteen gracilis tendons and 18 semitendinosus tendons from nine male cadavers (mean age: 22.44 years) were subjected to 10 in vitro cyclic loads at 2.5% strain level, or to a static load at 2.5% strain level. Results: During cyclic loading, the reduction in force values tended to stabilize after the sixth cyclic load, while, in the case of static loading, this stabilization occurred by the second minute. Comparing static and cyclic loading, the gracilis tendon had similar mechanical responses in both conditions, while the semitendinosus tendon showed greater force relaxation in static compared with cyclic loading. Conclusions: Considering that the semitendinosus tendon is the main component of the hamstring graft, its biomechanical response to loading should guide the tensioning protocol. Therefore, static tensioning seems more effective for promoting force relaxation of the semitendinosus tendon than cyclic tensioning. The gracilis tendon showed a similar mechanical response to either tensioning protocols.
Subject: Medicina esportiva
Ligamento cruzado anterior
Country: Países Baixos
Editor: Elsevier
Rights: Fechado
Identifier DOI: 10.1016/j.knee.2017.04.017
Address: https://www.thekneejournal.com/article/S0968-0160(17)30099-6/fulltext
Date Issue: 2017
Appears in Collections:FEAGRI - Artigos e Outros Documentos
FCM - Artigos e Outros Documentos

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