Effect of simplified chemical moisture control protocols on the bond durability of fiber posts cemented to root dentin / Efeito de protocolos simplificados de controle químico de umidade na durabilidade da união de pinos de fibra cimentados à dentina radicular

• Autor(a) principal: Rocha, Ricardo Lopes
• Data de Publicação: 2020
• Outros Autores: Dourado, Maria Olívia Alves, Dayrell, Andreza Costa, Pinheiro, Marcos Luciano Pimenta, Câmara, João Victor Frazão, Pierote, Josué Junior Araujo, Araújo, Cintia Tereza Pimenta de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Veras
• DOI: 10.34117/bjdv6n8-585
• Texto Completo: https://ojs.brazilianjournals.com.br/ojs/index.php/BRJD/article/view/15605
• topic: Tooth Root; Post and Core Technique; Humidity.

Objective: Investigate the influence of simplified chemical moisture control protocols on the bond durability of fiber posts through an evaluation of push-out bond strength.  Materials and methods: Forty-eight roots from single-rooted human teeth were treated endodontically and randomly distributed among groups with different dehydration protocols (n = 8): simplified ethanol wet bonding/100 (100G) – irrigation with 100% ethanol; simplified ethanol wet bonding/50 (50G) – irrigation with 50% ethanol; wet bonding (WG) – removal of excess water with paper. Fiber posts were cemented with the Ambar/Allcem (FGM) luting system, following the manufacturer's instructions. The bonded roots were cut cross-sectionally, producing slices 1 mm in thickness. The specimens were tested for push-out bond strength after 24 h (T1) and 12 months (T2) of storage. Specimens from each group were also processed for the nanoleakage analysis. The statistical analysis was performed considering a 5% significance level. Results: Significant differences were found among groups at T1 (p = 0.01) and T2 (p = 0.007). Bond stability in 100G was maintained after one year of aging, demonstrating greater bond strength (9.51 ± 3.28) in comparison to the other groups, with no significant differences in the analysis of the roots by thirds. The nanoleakage results confirmed that the simplified 100% ethanol wet bonding method improved the quality of the interface. Conclusions: Simplified 100% ethanol wet bonding contributes to the bond stability of the fiberglass posts on root dentin.