Tooth Discoloration Induced by Endodontic Phenothiazine Dyes in Photodynamic Therapy
dc.contributor.author | Figueiredo, Romulo Aguiar | |
dc.contributor.author | Anami, Lilian Costa [UNESP] | |
dc.contributor.author | Mello, Isabel | |
dc.contributor.author | Carvalho, Erica dos Santos | |
dc.contributor.author | Habitante, Sandra Marcia | |
dc.contributor.author | Raldi, Denise Pontes | |
dc.contributor.institution | Univ Taubate | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.contributor.institution | Univ Manitoba | |
dc.date.accessioned | 2015-03-18T15:54:42Z | |
dc.date.available | 2015-03-18T15:54:42Z | |
dc.date.issued | 2014-08-01 | |
dc.description.abstract | Objective: This study sought to assess if discoloration of tooth structures occurs after photodynamic therapy (PDT) and to determine the efficacy of a protocol to remove the photosensitizers. Background data: PDT has been used in root canal treatment to enhance cleaning and disinfection of the root canal system. PDT uses a low power laser in association with a dye as a photosensitizer. Photosensitizers can induce staining of the dental structures, resulting in an unaesthetic appearance. Methods: Forty teeth were randomly divided into four groups according to the photosensitizer used and pre-irradiation time: 0.01% methylene blue for 5 min (MB5); 0.01% methylene blue for 10 min (MB 10); 0.01% toluidine blue for 5 min (TB5); and 0.01% toluidine blue for 10 min (TB 10). Specimens were irradiated with a 660 nm diode laser with a 300 mu m diameter optical fiber, at 40 mW power setting for 3 min. Immediately after, the photosensitizers were removed with Endo-PTC cream +2.5% sodium hypochlorite (NaOCl). The shade was measured by a Vita Easyshade spectrophotometer based on the CIELAB color system (L*a*b* values) at three different experimental times: before PDT (T0), immediately after PDT (T1), and after removal of the photosensitizer (T2). Results: The results showed a decrease in the averages of the L*a*b* coordinate values after PDT (T1) in all the groups, when compared with the number at T0, with a significant statistical difference in group MB10. After photosensitizer removal (T2), all the values of the coordinates increased with significant statistical differences (p < 0.05) between T1 and T2 in L* and a*. Conclusions: It can be concluded that both methylene blue and toluidine blue dyes cause tooth discoloration, and that Endo-PTC cream associated with 2.5% NaOCl effectively remove these dyes, regardless of the pre-irradiation time used for PDT. | en |
dc.description.affiliation | Univ Taubate, Dept Dent, Sao Paulo, Brazil | |
dc.description.affiliation | UNESP Sao Paulo State Univ, Inst Sci & Technol, Dept Dent Mat & Prosthodont, Sao Paulo, Brazil | |
dc.description.affiliation | Univ Manitoba, Div Endodontol, Dept Restorat Dent, Winnipeg, MB, Canada | |
dc.description.affiliationUnesp | UNESP Sao Paulo State Univ, Inst Sci & Technol, Dept Dent Mat & Prosthodont, Sao Paulo, Brazil | |
dc.format.extent | 458-462 | |
dc.identifier | http://dx.doi.org/10.1089/pho.2014.3722 | |
dc.identifier.citation | Photomedicine And Laser Surgery. New Rochelle: Mary Ann Liebert, Inc, v. 32, n. 8, p. 458-462, 2014. | |
dc.identifier.doi | 10.1089/pho.2014.3722 | |
dc.identifier.issn | 1549-5418 | |
dc.identifier.uri | http://hdl.handle.net/11449/116995 | |
dc.identifier.wos | WOS:000340526100006 | |
dc.language.iso | eng | |
dc.publisher | Mary Ann Liebert, Inc | |
dc.relation.ispartof | Photomedicine And Laser Surgery | |
dc.relation.ispartofjcr | 1.620 | |
dc.relation.ispartofsjr | 0,443 | |
dc.rights.accessRights | Acesso restrito | |
dc.source | Web of Science | |
dc.title | Tooth Discoloration Induced by Endodontic Phenothiazine Dyes in Photodynamic Therapy | en |
dc.type | Artigo | |
dcterms.rightsHolder | Mary Ann Liebert, Inc | |
unesp.campus | Universidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia, São José dos Campos | pt |