Collagen Changes and Realignment Induced by Low-Level Laser Therapy and Low-Intensity Ultrasound in the Calcaneal Tendon

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dc.contributor.authorWood, Viviane Timm [UNIFESP]
dc.contributor.authorPinfildi, Carlos Eduardo [UNIFESP]
dc.contributor.authorNeves, Marco Aurelio Invaldi [UNIFESP]
dc.contributor.authorParizoto, Nivaldo Antonio
dc.contributor.authorHochman, Bernardo Sergio [UNIFESP]
dc.contributor.authorFerreira, Lydia Masako [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2016-01-24T14:05:15Z
dc.date.available2016-01-24T14:05:15Z
dc.date.issued2010-08-01
dc.description.abstractBackground and Objective: the treatment of calcaneal tendon injuries requires long-term rehabilitation Ultrasound (US) and low-level laser therapy (LLLT) are the most used and studied physical agents in the treatment of tendon injuries, however, only a few studies examined the effects of the combination of US and LLLT. Therefore, the purpose of this study was to investigate which treatment (the exclusive or combined use of US and LLLT) most effectively contribute to tendon healing.Study Design/Materials and Methods: This was a controlled laboratory study with 50 rats whose Achilles tendon was injured by direct trauma. the rats were randomly divided into five groups and treated for 5 consecutive days, as follows: group 1 (control) received no treatment; group 2 was treated with US alone, group 3 was treated with LLLT alone, group 4 was treated first with US followed by LLLT, and group 5 was treated first with LLLT followed by US On the sixth post-injury day, the tendons were removed and examined by polarized light microscopy. the organization of collagen fibers was assessed by birefringence measurements Picrosirius-stained sections were examined for the presence of types I and Ill collagen.Results: There was a significantly higher organization of collagen fibers in group 2 (US) than in the control group (P=0.03). the amount of type I collagen found in groups 2 (US), 3 (LLLT), and 5 (LLLT+US) was significantly higher than that in the control group (P <= 0.01), but no significant differences were found between treatment groups. There were no differences in the amount of type III collagen between groups.Conclusion: Ultrasound, LLLT, and the combined use of LLLT and US resulted in greater synthesis of type I collagen; US was also effective in increasing collagen organization in the early stages of the healing process Lasers Surg. Med. 42 559-565, 2010 (C) 2010 Wiley-Liss, Inc.en
dc.description.affiliationUniversidade Federal de São Paulo, Div Plast Surg, BR-04023002 São Paulo, Brazil
dc.description.affiliationUniv Fed Sao Carlos, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Div Plast Surg, BR-04023002 São Paulo, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipDivision of Plastic Surgery of the Federal University of São Paulo (UNIFESP)
dc.description.sponsorshipLaboratory of Vitreous Materials (LaMaV)
dc.description.sponsorshipDepartment of Materials of the Federal University of Sao Carlos (UFSCar)
dc.description.sponsorshipBioset Industria de Tecnologia Eletronica Ltda
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt
dc.format.extent559-565
dc.identifierhttps://dx.doi.org/10.1002/lsm.20932
dc.identifier.citationLasers in Surgery and Medicine. Hoboken: Wiley-liss, v. 42, n. 6, p. 559-565, 2010.
dc.identifier.doi10.1002/lsm.20932
dc.identifier.issn0196-8092
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/32762
dc.identifier.wosWOS:000281009400015
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofLasers in Surgery and Medicine
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dc.subjectAchilles tendonen
dc.subjectBirefringenceen
dc.subjectDiode laseren
dc.subjectPhysical therapyen
dc.subjectPicrosirius reden
dc.subjectTendon injuriesen
dc.subjectUltrasonographyen
dc.titleCollagen Changes and Realignment Induced by Low-Level Laser Therapy and Low-Intensity Ultrasound in the Calcaneal Tendonen
dc.typeinfo:eu-repo/semantics/article
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