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,
¼Ò¼Ó »ó¼¼Á¤º¸
( 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 (¥á = 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.
Å°¿öµå
Bond strength; Hardness tests; Resin-based cement; Resin-based composite
¿ø¹® ¹× ¸µÅ©¾Æ¿ô Á¤º¸
µîÀçÀú³Î Á¤º¸