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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/47520
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dc.creatorAmanda Miyuki Terayamapt_BR
dc.creatorFrancine Benettipt_BR
dc.creatorJuliana Maria de Araújo Lopespt_BR
dc.creatorJéssica Galbiati Barbosapt_BR
dc.creatorIsabela Joane Prado Silvapt_BR
dc.creatorGustavo Sivieri Araújopt_BR
dc.creatorAndré Luiz Fraga Brisopt_BR
dc.creatorLuciano Tavares Angelo Cintrapt_BR
dc.date.accessioned2022-11-29T00:05:59Z-
dc.date.available2022-11-29T00:05:59Z-
dc.date.issued2020-03-20-
dc.citation.volume24pt_BR
dc.citation.spage3911pt_BR
dc.citation.epage3921pt_BR
dc.identifier.doihttps://doi.org/10.1007/s00784-020-03258-9pt_BR
dc.identifier.issn14363771pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/47520-
dc.description.resumoObjectives: We evaluated the effects of low-level laser therapy (LLLT) using an infrared laser (IRL) and a red laser (RL) on the pulp of molar teeth in rats after dental bleaching to assess inflammation, collagen fiber maturation, and tertiary dentin formation. Materials and methods: Eighty Wistar rats (Rattus norvegicus, albinus) were randomly divided into eight groups with 10 hemimaxillae in each of the following: control; bleached (Ble, 35% hydrogen peroxide [H2O2]); Ble-1IRL and Ble-1RL (one IRL [808 nm, 30 s, 3 J] or RL [660 nm, 15 s, 1.5 J] application immediately after H2O2); Ble-3IRL and Ble-3RL (three [immediately, 24 h, and 48 h] IRL or RL applications after H2O2); and 3IRL and 3RL (three IRL or RL applications without bleaching). The rats were euthanized after 2 and 30 days for histological evaluation of inflammation (hematoxylin-eosin) and maturation of collagen fibers (picrosirius red). Additionally, the dentin deposition in the specimens obtained at 30 days was quantified via microtomography of the pulp chamber volume. Statistical analyses were performed (P < 0.05). Results: Initially, severe damages to the pulp were observed in the Ble and Ble-1RL groups. Ble-1IRL and Ble-3RL groups showed lower inflammation. The bleached groups had a greater amount of mature collagen fibers than the control group. The Ble-3IRL group had a greater number of immature fibers than the Ble group. At 30 days, there was an absence of inflammation and equal proportion of mature and immature collagen fibers. All bleached groups showed a reduction in the volume of the pulp chamber. Conclusion: Three consecutive applications of RL and one IRL application can minimize damage to the pulp of bleached teeth, whereas three IRL applications can minimize pulp fibrosis. However, LLLT did not prevent deposition of tertiary dentin. Clinical relevance: This study describes LLLT protocols capable of minimizing inflammation and maturation of collagen fibers in pulp tissue after dental bleaching. However, the protocols proved insufficient for reducing the formation of tertiary dentin in bleached teeth.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPESP - Fundação de Amparo à Pesquisa do Estado de São Paulopt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentFAO - DEPARTAMENTO DE ODONTOLOGIA RESTAURADORApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relationPrograma Institucional de Internacionalização – CAPES - PrIntpt_BR
dc.relation.ispartofClinical Oral Investigationspt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectDental bleachingpt_BR
dc.subjectDental pulppt_BR
dc.subjectHydrogen peroxidept_BR
dc.subjectLow-level laser therapypt_BR
dc.subjectTertiary dentinpt_BR
dc.subject.otherDentinpt_BR
dc.subject.otherTooth bleachingpt_BR
dc.subject.otherDental pulppt_BR
dc.subject.otherHydrogen peroxidept_BR
dc.subject.otherLow-level light therapypt_BR
dc.titleInfluence of low-level laser therapy on inflammation, collagen fiber maturation, and tertiary dentin deposition in the pulp of bleached teethpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://link.springer.com/article/10.1007/s00784-020-03258-9pt_BR
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