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6CCVD Research

Evaluation of Shear Bond Strengths of Indirect Composite and Ceramic Restorations to Bleached Enamel

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2020-04-30
AuthorsHatice Ağan, Hakan Terzioğlu

Abstract

Section titled “Abstract”

The aim of this study was to determine the shear bond strength of composite resin and lithium disilicate porcelain to bleached enamel 1 day or 2 weeks later using different adhesive resin luting cement. 84 flat enamel surfaces were prepared from freshly extracted non-carious human maxillary permanent incisors using low speed diamond saw. Specimens were randomly assigned to a control group (Group I) and two experimental bleaching groups accoding to the 1st day (Group II) or 2 weeks (Group III) after bleaching treatment with %30 carbamide peroxide (Zaris WhiteB Group A: Specimens were luted to lithium disilicate blocks with light cure resin cement. Group B: Specimens were luted to composite resin blocks with light cure resin cement. Group C:Specimens were luted to lithium disilicate blocks with dual cure resin cement, Group D:Specimens were luted to composite resin blocks with dual cure resin cement. Surface preparations of the specimens and cementation procedure was done due to manufacturer’s recommendations. Specimens were thermocycled 1000 times and shear bond strengths were determined using a universal testing machine. The data was evaluated using 3 way ANOVA and Tukey’s HSD tests. Control group (Group I) demonstrated significantly higher shear bond strength than bleaching groups (Group II & Group III) (p˂0.05). In all subgroups. Group II shows the lowest scores. There were no statistically significant difference found among composite and ceramic material results. But as a luting agent; dual cure resin cement showed statistically significant lower shear bond strength values than light cure resin cement (p˂0.05) . Bleaching significantly decreased bond strength. Bonding after 2 weeks demonstrated higher bond strengths than after 1 day. There was no statistically significant difference among luting agents in composite groups. Light cured resin cement showed better results than dual cured in ceramic groups.

Tech Support

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