Nanofiller Particles and Bonding Durability, Water Sorption, and Solubility of Universal Adhesives

Author:

Araújo-Neto VG1,Moreira MM2,Ñaupari-Villasante R3,De Paula DM4,Medeiros STCB5,Loguercio AD6,Feitosa VP7

Affiliation:

1. *Vitaliano Gomes Araújo-Neto, Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil

2. Madiana Magalhães Moreira, DDS, MS, Post-graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Brazil

3. RominaÑaupari-Villasante, DDS, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil

4. Diego Martins De Paula, DDS, MS, PhD, Paulo Picanço School of Dentistry, Fortaleza, Brazil

5. Samara Tabata Cavalcante Braga Medeiros, DDS student, Paulo Picanço School of Dentistry, Fortaleza, Brazil

6. Alessandro Dourado Loguercio, DDS, MS, PhD, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil

7. Victor Pinheiro Feitosa, DDS, MS, PhD, Paulo Picanço School of Dentistry, Fortaleza, Brazil

Abstract

SUMMARY The aim of this study was to evaluate the influence of nanofiller particles in simplified universal adhesive on the long-term microtensile bond strength and silver nitrate up-take, as well as water sorption and solubility. Commercial adhesives Ambar Universal (FGM) in nanofilled-containing version (filled) and same lot without fillers (unfilled) were donated and applied by means of etch-and-rinse strategy. Microtensile bond strength was surveyed after 24-hours or 1-year water storage. Silver nitrate uptake was assayed using scanning electron microscopy (SEM). Water sorption and solubility experiments were performed based on ISO 4049:2009. Statistical analysis was performed using two-way ANOVA and Tukey test (p<0.05). The bond strength of both the adhesives were statistically similar at 24 hours (p>0.05), but the filled group attained significant bond strength reduction after aging when compared to initial bond strength (p<0.001). Conversely, unfilled adhesive presented stable adhesion after 1-year storage (p=0.262). Silver nitrate uptake was similar for both adhesives, with little silver impregnation at the hybrid and adhesive layers. Water sorption was higher with filled adhesive compared to the unfilled one (p=0.01). Conversely, solubility was higher in unfilled in comparison to filled one (p=0.008). The presence of nanofillers in universal adhesive achieves higher water sorption and dentin bond degradation, which did not occur in the unfilled adhesive.

Publisher

Operative Dentistry

Subject

General Dentistry

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