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dc.contributor.authorPiedade, Sérgio Rocha
dc.contributor.authorDal Fabbro, Inácio Maria
dc.contributor.authorMischan, Martha Maria [UNESP]
dc.contributor.authorPiedade, Cezar [UNESP]
dc.contributor.authorMaffulli, Nicola
dc.date.accessioned2018-12-11T17:32:31Z
dc.date.available2018-12-11T17:32:31Z
dc.date.issued2017-08-01
dc.identifierhttp://dx.doi.org/10.1016/j.knee.2017.04.017
dc.identifier.citationKnee, v. 24, n. 4, p. 775-781, 2017.
dc.identifier.issn1873-5800
dc.identifier.issn0968-0160
dc.identifier.urihttp://hdl.handle.net/11449/178880
dc.description.abstractBackground 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.en
dc.format.extent775-781
dc.language.isoeng
dc.relation.ispartofKnee
dc.sourceScopus
dc.subjectAnterior cruciate ligament
dc.subjectGraft tensioning
dc.subjectHamstring graft
dc.subjectSports medicine
dc.subjectTendon stress–strain
dc.titleStatic tensioning promotes hamstring tendons force relaxation more reliably than cycling tensioningen
dc.typeArtigo
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversity of Salerno
dc.contributor.institutionMile End Hospital
dc.description.affiliationExercise and Sports Medicine Group School of Medical Sciences UNICAMP Campinas Brazil Department of Orthopaedic and Traumatology School of Medical Sciences UNICAMP
dc.description.affiliationSchool of Agricultural Engineering UNICAMP
dc.description.affiliationDepartment of Biostatistics UNESP
dc.description.affiliationDepartment of Agricultural Rural Engineering UNESP
dc.description.affiliationDepartment of Musculoskeletal Disorders Faculty of Medicine and Surgery University of Salerno
dc.description.affiliationCentre for Sports and Exercise Medicine Barts and The London School of Medicine and Dentistry Mile End Hospital, 275 Bancroft Road
dc.description.affiliationUnespDepartment of Biostatistics UNESP
dc.description.affiliationUnespDepartment of Agricultural Rural Engineering UNESP
dc.identifier.doi10.1016/j.knee.2017.04.017
dc.rights.accessRightsAcesso aberto
dc.identifier.scopus2-s2.0-85019587292
dc.identifier.file2-s2.0-85019587292.pdf
dc.relation.ispartofsjr1,244
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