Effects of Dentine Pretreatment Solutions Containing Flavonoids on the Resin Polymer-Dentine Interface Created Using a Modern Universal Adhesive

Overview

Journal Polymers (Basel)

Publisher MDPI

Date 2021 Apr 30

PMID 33918441

Citations 4

Authors

Andres Davila-Sanchez

Mario Felipe Gutierrez

Jorge Pailover Bermudez

Lujan Mendez-Bauer

Camilo Pulido

Fagner Kiratzc

Luisa Fernanda Alegria-Acevedo

Paulo Vitor Farago

Alessandro Dourado Loguercio

Salvatore Sauro

Cesar Augusto Galvao Arrais

Affiliations

Soon will be listed here.

Abstract

The aim of the present study was to evaluate the influence of several experimental pretreatment crosslinker solutions on the resin polymer-dentine interface created using a representative universal adhesive system, by means of microtensile bond strength testing (μTBS), nanomechanical properties and ultramorphology confocal laser scanning microscopy (CLSM). Five experimental solutions containing different flavonoids were applied as dentine pretreatment after acid etching. A control pretreatment group containing no flavonoid was also employed. A representative modern universal adhesive was then applied, followed by a 3 mm thick composite built up. Specimens were sectioned into sticks and submitted to a μTBS test or nanoindentation analysis along the interface (24 h or 25,000 thermocycles). The ultramorphology of the polymer-resin interface was also evaluated using CLSM. The results were analyzed using two-way ANOVA and Bonferroni's post hoc test (α = 0.05). All flavonoids improved short- and long-term μTBS values ( < 0.01), while only some specific such solutions improved the nanomechanical properties ( < 0.05) and preserved the structural morphology of the interface after aging. Pretreatment of acid-etched dentine using specific flavonoid-containing solutions may be a promising approach to improve both the nanomechanical properties and the durability of modern universal adhesive systems.

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