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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Does photodynamic therapy with methylene blue affect the mechanical properties and bond strength of glass-fiber posts in different thirds of intraradicular dentin?

Texto completo
Autor(es):
de Oliveira, Murilo Silva [1, 2] ; da Silva, Paloma Pereira [1, 2] ; de Melo, Fernanda Santos [1, 2] ; Teixeira Martinez, Carolina Martins [1, 2] ; Angelo Cintra, Luciano Tavares [1, 2] ; Gomes-Filho, Joao Eduardo [1, 2] ; dos Santos, Paulo Henrique [1]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Sao Paulo State Univ UNESP, Aracatuba Sch Dent, Dept Dent Mat & Prosthodont, Aracatuba, SP - Brazil
[2] Sao Paulo State Univ UNESP, Aracatuba Sch Dent, Dept Restorat Dent, Discipline Endodont, Aracatuba, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Photodiagnosis and Photodynamic Therapy; v. 30, JUN 2020.
Citações Web of Science: 1
Resumo

Background: There are few studies on the influence of methylene blue as a photosensitiser on the mechanical properties and adhesion of glass-fiber posts to intraradicular dentin. Thus, this in vitro study aimed to evaluate the influence of photodynamic therapy with a methylene blue photosensitizer on the Martens hardness, elastic modulus, and bond strength of glass-fiber posts in different thirds of intraradicular dentin. Methods: Eighty bovine teeth were divided into the following five groups: a control using deionized water, and four other groups according to the methylene blue concentration (50 mg/L or 100 mg/L) and substrate treatment (with or without red laser action). Ultramicrohardness test was used to evaluate the mechanical properties in different regions of the root dentin (n = 8). Push-out analysis was evaluated using a universal testing machine (n = 8). Data were subjected to the Kruskal-Wallis test, followed by Dunn's test for comparing groups, and the Friedman test for comparing thirds (alpha = 0.05). Representative scanning electron microscopy images were obtained. Results: In general, methylene blue in distinct concentrations, with or without laser action, did not cause differences in the mechanical properties or bond strength in different regions of root dentin (P > 0.05). Methylene blue at a higher concentration, activated with laser, produced lower bond strength values in the middle third of the root canal (P < 0.05). Conclusions: Methylene blue at 50 mg/L had no influence on the mechanical properties of the bovine tooth and the bond strength of the glass-fiber posts to intraradicular dentin. (AU)

Processo FAPESP: 15/06056-3 - Influência da terapia fotodinâmica na resistência de união de pinos de fibra de vidro à dentina radicular
Beneficiário:Paloma Pereira da Silva
Modalidade de apoio: Bolsas no Brasil - Iniciação Científica