Comparison between a bulk-fill resinbased composite and three luting materials on the cementation of fiberglass-reinforced posts
- Author:
Carlos Alberto KENJI SHIMOKAWA
1
;
Paula Mendes ACATAUASSÚ CARNEIRO
;
Tamile Rocha da SILVA LOBO
;
Roberto Ruggiero BRAGA
;
Míriam Lacalle TURBINO
;
Adriana Bona MATOS
Author Information
- Publication Type:Research Article
- From:Restorative Dentistry & Endodontics 2023;48(3):e30-
- CountryRepublic of Korea
- Language:English
-
Abstract:
Objectives:This study verified the possibility of cementing fiberglass-reinforced posts using a flowable bulk-fill composite (BF), comparing its push-out bond strength and microhardness with these properties of 3 luting materials.
Materials and Methods:Sixty endodontically treated bovine roots were used. Posts were cemented using conventional dual-cured cement (CC); self-adhesive cement (SA); dual-cured composite (RC); and BF. Push-out bond strength (n = 10) and microhardness (n = 5) tests were performed after 1 week and 4 months of storage. Two-way repeated measures analysis of variance (ANOVA), 1-way ANOVA, t-test, and Tukey post-hoc tests were applied for the pushout bond strength and microhardness results; and Pearson correlation test was applied to verify the correlation between push-out bond strength and microhardness results (α = 0.05).
Results:BF presented higher push-out bond strength than CC and SA in the cervical third before aging (p < 0.01). No differences were found between push-out bond strength before and after aging for all the luting materials (p = 0.84). Regarding hardness, only SA presented higher values measured before than after aging (p < 0.01). RC and BF did not present 80% of the maximum hardness at the apical regions. A strong positive correlation was found between the luting materials' push-out bond strength and microhardness (p < 0.01, R 2 = 0.7912).
Conclusions:The BF presented comparable or higher push-out bond strength and microhardness than the luting materials, which indicates that it could be used for cementing resin posts in situations where adequate light curing is possible.
