Comparison between a bulk-fill resin-based composite and three luting materials on the cementation of fiberglass-reinforced posts
Carlos Alberto Kenji Shimokawa, Paula Mendes Acatauassu Carneiro, Tamile Rocha da Silva Lobo, Roberto Ruggiero Braga, Sachini N.K. Kodithuwakku Arachchige, Adriana Bona Matos,
소속 상세정보
( Carlos Alberto Kenji Shimokawa ) -
( Paula Mendes Acatauassu Carneiro ) -
( Tamile Rocha da Silva Lobo ) -
( Roberto Ruggiero Braga ) -
( Sachini N.K. Kodithuwakku Arachchige ) -
( Adriana Bona Matos ) -
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 push-out 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, R2 = 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.
키워드
Bond strength; Hardness tests; Resin-based cement; Resin-based composite
원문 및 링크아웃 정보
등재저널 정보