Effect of ultrasonic cleaning on the bond strength of fiber posts in oval canals filled with a premixed bioceramic root canal sealer
Bengoa Fernando Pena, Arze Maria Consuelo Magasich, Noguera Cristobal Macchiavello, Moreira Luiz Felipe Nunes, Kato Augusto Shoji, Da Silveira Bueno Carlos Eduardo,
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( Bengoa Fernando Pena ) - Universidad Andres Bello Faculty of Dentistry Department of Endodontics
( Arze Maria Consuelo Magasich ) - Private practice
( Noguera Cristobal Macchiavello ) - Private practice
( Moreira Luiz Felipe Nunes ) - Universidade Vale do Rio Doce Faculty of Dentistry Department of Endodontics
( Kato Augusto Shoji ) - Instituto de Pesquisas Sao Leopoldo Mandic Faculdade Sao Leopoldo Mandic
( Da Silveira Bueno Carlos Eduardo ) - Instituto de Pesquisas Sao Leopoldo Mandic Faculdade Sao Leopoldo Mandic
Abstract
Objective: This study aimed to evaluate the effect of ultrasonic cleaning of the intracanal post space on the bond strength of fiber posts in oval canals filled with a premixed bioceramic (Bio-C Sealer [BIOC]) root canal sealer.
Materials and Methods: Fifty premolars were endodontically prepared and divided into 5 groups (n = 10), based on the type of root canal filling material used and the post space cleaning protocol. A1: gutta-percha + AH Plus (AHP) and post space preparation with ultrasonic cleaning, A2: gutta-percha + BIOC and post space preparation with ultrasonic cleaning, B1: gutta-percha + AHP and post space preparation, B2: gutta-percha + BIOC and post space preparation, C: control group. Fiber posts were cemented with a self-adhesive luting material, and 1 mm thick slices were sectioned from the middle and cervical third to evaluate the remaining filling material microscopically. The samples were subjected to a push-out test to analyze the bond strength of the fiber post, and the results were analyzed with the Shapiro-Wilk, Bonferroni, Kruskal-Wallis, and Mann-Whitney tests (p < 0.05). Failure modes were evaluated using optical microscopy.
Results: The results showed that the fiber posts cemented in canals sealed with BIOC had lower bond strength than those sealed with AHP. The ultrasonic cleaning of the post space improved the bond strength of fiber posts in canals sealed with AHP, but not with BIOC.
Conclusions: BIOC decreased the bond strength of fiber posts in oval canals, regardless of ultrasonic cleaning.
키워드
Endodontics; Push-out bond strength; Sealer; Ultrasonic tips
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