Bond Strength of Two Universal Adhesive Systems to Human Dentin Using Different Strategies

Overview

Journal Acta Odontol Latinoam

Specialty Dentistry

Date 2023 Feb 7

PMID 36748733

Authors

Daniel Jb Dutra

Natalia Tt Branco

Hugo H Alvim

Claudia S Magalhaes

Ricardo R Oliveira

Allyson N Moreira

Affiliations

Soon will be listed here.

Abstract

Materials And Method: Thirty-six human teeth were prepared (n=6) and treated following different adhesive strategies: G1: SBU-etch-and-rinse, applied on dry dentin; G2: SBUetch- and-rinse, applied on moist dentin; G3: SBU-self-etching; G4: AU-etch-and-rinse, applied on dry dentin; G5: AU-etch-and-rinse, applied on moist dentin; G6: AU-self-etching. The specimens were submitted to μTBS test, failure analysis, and scanning electron microscopy (SEM). Data were analyzed with ANOVA and Tukey's tests (p<0.05).

Results: Microtensile bond strength was significantly lower in G1 than G2 and G3. AU adhesive performed worse than the SBU system, except in G5. Cohesive and mixed failures predominated in G1 and G2, while adhesive failures predominated in G3 and G5.

Conclusions: Universal adhesives are an interesting innovation, but there are still doubts about their performance, mainly regarding the different protocols provided by the manufacturers. The conventional adhesive strategy on moist dentin demonstrated higher μTBS for both adhesives. The use of the selfetching strategy with the SBU showed promising results.

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