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.
Root surface treatments with high-powered diode laser irradiation prior to delayed replantation reduced the occurrence of external root resorption compared to no treatment or sodium fluoride treatment at up to 60 days.
Background and objective: 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 ¼ 10), according to the chemical adjuncts used for dye removal: (a) 2.5% sodium hypochlorite (NaOCl); (b) 2.5% NaOCl þ 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 (À3.11) > G2 (À2.97) > G3 (À1.28) > G4 (À1.19), 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.
DL, with or without FGF, reduced the occurrence of external root resorption and ankylosis. Periodontal healing was favored and some fiber reinsertion occurred only when FGF was used.
A avulsão é uma sequela de traumatismo grave, caracterizada pela total desarticulação do dente com seu alvéolo. O tratamento após a avulsão de um dente permanente deve ser o reimplante imediato, caso não seja possível, deve ser mantido em um meio que permita a viabilidade das células do ligamento periodontal. Este trabalho foi realizado com o objetivo de avaliar o conhecimento dos dentistas clínicos e acadêmicos do último ano de Odontologia sobre os meios de armazenamento e reimplante dentário. O estudo é descritivo, com amostra de conveniência de clínicos e formandos (n=100), que responderam questionários sobre a avulsão dentária e o meio utilizado para transportar tais dentes. Com relação à realização do reimplante, 94% responderam que fariam e 6% não teriam capacidade de fazer. Dentre os que fariam, 91 % lavariam antes de reposicionar o dente no alvéolo, sendo que 53% com soro fisiológico, 42% com água corrente, 3% com leite e 2% com água destilada. A maioria encaminharia para um endodontista (72%), entretanto, 19% não encaminharia para um especialista. Quanto ao meio de armazenamento antes do reimplante, 57% julgaram ser na própria boca, 19% num frasco com leite, 18% num frasco com soro e 6% num frasco com saliva. Sobre o período ideal para o reimplante, 83% julgaram ser imediatamente após a avulsão, 15% entre 30 minutos e 1 hora e 2% entre 1 a 4 horas. O conhecimento sobre o manejo dos dentes avulsionados na comunidade odontológica é satisfatório, entretanto, ainda se percebe alguns equívocos com relação ao tema.
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