Effect of S. mutans biofilm on the hybrid ceramic-resin cement bond strength assessed by different methods
Braz. j. oral sci
; 22: e239389, Jan.-Dec. 2023. ilus
Article
em En
| LILACS, BBO
| ID: biblio-1509457
Biblioteca responsável:
BR218.1
ABSTRACT
Aim:
The purpose of this study was to investigate the biofilm effect on the hybrid ceramic-resin cement bond strength (BS) by comparing two methods.Methods:
Teeth were distributed into groups (n=5), according to the resin cement (Maxcem Elite-(MC) or NX3 Nexus-(NX)) and degradation method (24h or 7 days in distilled water; 7 or 30 days incubated with biofilm and 30 days in sterile media). Treated surfaces of Vita Enamic blocks (5x6x7mm) were luted to treated or no treated dentin surfaces and light-cured. After 24h, beams were obtained (1x1x10mm) and stored accordingly. The flexural bond strength (FBS) was assessed by four-point bending test. Additional beams were obtained from new teeth (n=5), stored for 24h or 7 days in distilled water, and submitted to a microtensile bond strength (µTBS) assay. Failure modes were determined by scanning electron microscopy (100X). The flexure strength of the cements (n=10) was assessed by a four-point bending test. Data were analyzed by 1 and 2-ways ANOVA, and Tukey's test (α=0.05).Results:
There was no significant difference between the degradation methods for the FBS groups. For the µTBS, the significant difference was as follows NX 7days > NX 24h > MC 7days = MC 24h. Failure mode was mainly adhesive and mixed, but with an increase of cohesive within cement and pre-failures for the MC groups assessed by µTBS. NX had better performance than MC, regardless of the method.Conclusions:
The biofilm had no effect on the materials BS and FBS test was a useful method to evaluate BS of materials with poor performanceAssuntos
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Texto completo:
1
Índice:
LILACS
Assunto principal:
Resistência à Tração
/
Microscopia Eletrônica de Varredura
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Colagem Dentária
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Biofilmes
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Cimentos de Resina
Idioma:
En
Revista:
Braz. j. oral sci
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2023
Tipo de documento:
Article