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

Genine Moreira De Freitas Guimarães,Maria Teresa Atta,Tamires De Luccas Bueno,Carolina Yoshi Campos Sugio,Maria Angélica Silvério Agulhari,Karin Cristina Da Silva Modena

doi:10.20396/bjos.v20i00.8659342

Genine Moreira De Freitas Guimarães, Maria Teresa Atta + Show 4 more

Open Access

https://doi.org/10.20396/bjos.v20i00.8659342

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Abstract

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.

Highlights

Since the introduction of the adhesive systems, over 50 years ago, the union interface to dentin remains the weakest link in restorative treatment[1,2,3,4]
Non-significant differences were detected in the microtensile bond strength among the adhesives tested and the periods evaluated (p = 0.1772) as well as the interaction dentin bonding system (DBS)/time (p=0.570)
This study compared the μTBS of dentin, using a universal (SU) and a conventional adhesive (MP) in the etch-and-rinse mode

Summary

Introduction

Since the introduction of the adhesive systems, over 50 years ago, the union interface to dentin remains the weakest link in restorative treatment[1,2,3,4]. Many studies have shown excellent short-term and immediate adhesion effectiveness[5,6], the durability and stability of the adhesive interface on dentin remain questionable[7,8] due to its inherent characteristics. As a disadvantage, if all the collagen exposed after acid etch is not completely covered by the adhesive systems, matrix metalloproteinases (MMPs) are activated, when they have free access to water, causing restoration failures and post-operative sensitivity[8,11,12]

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