Dentin bond strength evaluation between a conventional and universal adhesive using etch-and-rinse strategy

• Published in: Brazilian journal of oral sciences Vol. 20; p. e219342
• Main Authors: Moreira de Freitas Guimarães, Genine, Modena, Karin Cristina da Silva, Sugio, Carolina Yoshi Campos, de Luccas Bueno, Tamires, Silvério Agulhari, Maria Angélica, Atta, Maria Teresa
• Format: Journal Article
• Language: English
• Published: Universidade Estadual de Campinas 08-02-2021
• Subjects: Dentin; Dentin-bonding agents; Methacrylates; Microscopy, confocal
• ISSN: 1677-3225; 1677-3225
• DOI: 10.20396/bjos.v20i00.8659342

Aim: The aim of this study was to compare the microtensile bond strength (μTBS) and the characteristics of the adhesive interface of Scotchbond Universal - SU – etch-and-rise mode (3M ESPE) and Adper Scotchbond Multi-Purpose - MP (3M ESPE) to dentin over time. Methods: Class I cavity preparations were performed in 60 human molars that were randomly divided according to the dentin bonding system (DBS) used (n=30): (1) Acid conditioning + SU and (2) Acid conditioning + MP. For bonding strength (BS) analysis, 30 teeth (n = 15) were sectioned into sticks and submitted to the microtensile test in a universal testing machine after 24 hours and 12 months. The adhesive interface of the others 30 teeth was analyzed in a confocal microscope after 24 hours and 12 months. The data of μTBS were analyzed by two-way repeated measures ANOVA and Tukey’s HSD (α = 0.05). Results: SU presented the lowest DBS compared to MP (p=0.000). Time did not influenced DBS for both adhesive systems (p=0.177). Confocal microscopy analysis showed no cracks between both adhesive systems tested. Conclusion: The results indicate that MP - μTBS showed a better performance compared to SU in total-etch mode.