Skip navigation
Universidade Federal da Bahia |
Repositório Institucional da UFBA
Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/15643
Tipo: Artigo de Periódico
Título: Effect of Chemical Substances in Removing Methylene Blue After Photodynamic Therapy in Root Canal Treatment
Título(s) alternativo(s): Photomedicine and Laser Surgery
Autor(es): Carvalho, Erica dos Santos
Mello, Isabel
Albergaria, Sílvio José
Habitante, Sandra Márcia
Marques, José Luiz Lage
Raldi, Denise Pontes
Autor(es): Carvalho, Erica dos Santos
Mello, Isabel
Albergaria, Sílvio José
Habitante, Sandra Márcia
Marques, José Luiz Lage
Raldi, Denise Pontes
Abstract: The disadvantage of photodynamic therapy (PDT) is in the photosensitizing agents that may stain the tooth structure. There is no register of PDT studies evaluating protocols to minimize that concern. The present study evaluated the efficiency of chemical adjuncts in methylene blue dye (MB) removal after PDT. Materials and methods: Forty single-rooted teeth, after root canal preparation, were filled with 0.01% MB for 5 min, and irradiated with diode laser 660 nm at 40 mW for 240 sec (total energy 9.6 J). The specimens were divided into four groups (n = 10), according to the chemical adjuncts used for dye removal: (a) 2.5% sodium hypochlorite (NaOCl); (b) 2.5% NaOCl + Endo-PTC cream; (c) 70% ethyl alcohol and (d) saline (control). The crowns were sectioned and fixed in a device. Photographs were taken before the PDT (T0), immediately after (T1) and upon dye removal (T2). The chromatic alterations were evaluated using Adobe Photoshop and K values were determined in four fixed points of each crown. Results: K values (dental staining) increased in all groups when comparing T0 and T1. The effectiveness of the tested adjuncts was, in decreasing order: G1 (−3.11) > G2 (−2.97) > G3 (−1.28) > G4 (−1.19), not observing significant statistical differences (p < 0.05) between G1 and G2 and also between G3 and G4. Conclusions: Protocols to remove photosensitizing dyes should be applied after PDT in order to minimize dental stain. The protocols tested in this study by using 2.5% NaOCl, associated or not with Endo-PTC cream, were effective in avoiding tooth staining caused by MB during PDT.
Palavras-chave: Chemical Compounds
Methylene Blue
Photochemotherapy
Dental Pulp Cavity
Tipo de Acesso: Acesso Aberto
URI: http://repositorio.ufba.br/ri/handle/ri/15643
Data do documento: 2011
Aparece nas coleções:Artigo Publicado em Periódico (Faculdade de Odontologia)

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
Silvio José Albergaria.pdf247,09 kBAdobe PDFVisualizar/Abrir
Mostrar registro completo do item Visualizar estatísticas


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.