Flexural strength and microhardness of bulk‐fill restorative materials

Beatriz Curvello de Mendonça; Jorge Rodrigo Soto‐Montero; Eduardo Fernandes de Castro; Vanessa Gallego Arias Pecorari; Frederick Allen Rueggeberg; Marcelo Giannini

doi:10.1111/jerd.12727

journal article Mar 05, 2021

Flexural strength and microhardness of bulk‐fill restorative materials

Beatriz Curvello de Mendonça

Jorge Rodrigo Soto‐Montero Eduardo Fernandes de Castro

Vanessa Gallego Arias Pecorari

Frederick Allen Rueggeberg

Marcelo Giannini

Journal of Esthetic and Restorative Dentistry Vol. 33 No. 4 pp. 628-635 · Wiley

View at Publisher Save 10.1111/jerd.12727

Abstract

AbstractBackgroundBulk‐fill materials can facilitate the restorative procedure mainly for deep and wide posterior cavities. The purpose of this study was to evaluate flexural strength (biaxial flexural strength [BFS]) and microhardness (Knoop microhardness [KHN]) at different depths of bulk‐fill materials.MethodsFive bulk‐fill materials were tested: two light‐curable composite resins, one dual‐cure composite, one bioactive restorative, and a high‐viscosity glass ionomer. A conventional composite was used as control. BFS and KHN were tested at different depths. Data was analyzed by two‐ and one‐way ANOVAs, respectively and Tukey's post‐hoc (α=0.05).ResultsThe high‐viscosity glass ionomer material presented the lowest BFS at all depths. KHN for the two light‐curable and the dual‐cure bulk‐fill resin composites was reduced following an increase in restoration depth, while the conventional composite, the bioactive material, and the high‐viscosity glass ionomer were not affected.ConclusionThere are differences in the properties of the tested materials at 4 mm depth, showing that the studied properties of some materials vary according to the cavity depth, although the results are material dependent.Clinical SignificanceMechanical properties of light‐cured, bulk‐fill materials may be affected by inadequate polymerization. Clinicians should consider complementary strategies to achieve adequate polymerization at high‐increment depths.

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Details

Published: Mar 05, 2021
Vol/Issue: 33(4)
Pages: 628-635
License: View

Authors

B

Beatriz Curvello de Mendonça

Department of Restorative Dentistry, Piracicaba Dental School University of Campinas Piracicaba Brazil

J

Jorge Rodrigo Soto‐Montero

Department of Restorative Dentistry, Piracicaba Dental School University of Campinas Piracicaba Brazil; Department of Restorative Dentistry University of Costa Rica, School of Dentistry Montes de Oca Costa Rica

E

Eduardo Fernandes de Castro

Department of Restorative Dentistry, Piracicaba Dental School University of Campinas Piracicaba Brazil

V

Vanessa Gallego Arias Pecorari

Department of Biostatistics Paulista University (UNIP) Sāo Paulo Brazil

F

Frederick Allen Rueggeberg

Department of Restorative Sciences Dental College of Georgia at Augusta University Augusta Georgia USA

M

Marcelo Giannini

Department of Restorative Dentistry, Piracicaba Dental School University of Campinas Piracicaba Brazil

Funding

Universidad de Costa Rica Award: #OAICE‐047‐2017

Cite This Article

Beatriz Curvello de Mendonça, Jorge Rodrigo Soto‐Montero, Eduardo Fernandes de Castro, et al. (2021). Flexural strength and microhardness of bulk‐fill restorative materials. Journal of Esthetic and Restorative Dentistry, 33(4), 628-635. https://doi.org/10.1111/jerd.12727

Flexural strength and microhardness of bulk‐fill restorative materials

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