Resin-based luting agents and color stability of bonded ceramic veneers

Júlia R. Almeida, Gabriela U. Schmitt, Marina R. Kaizer, Noéli Boscato, Rafael R. Moraes

Research output: Contribution to journalArticlepeer-review

86 Citations (Scopus)

Abstract

Statement of problem. The type of resin-based luting agent might influence the color stability of ceramic veneers.

Purpose. The purpose of this study was to investigate the effects of resin-based agents and aging on the color stability of ceramic veneers bonded to enamel.

Material and methods.  Ceramic disks were cemented to bovine enamel disks with 4 resin-based luting agents (n=10): dual-polymerizing cement (RelyX ARC), light-polymerizing cement (RelyX Veneer), flowable composite resin (Filtek Z350 Flow), or composite resin preheated for 30 minutes at 60°C (Filtek Z350 XT). CIE L∗, a∗, and b∗color coordinates were measured 24 hours after cementation (baseline) with a color spectrophotometer and reevaluated after 10 000 and 20 000 thermal cycles. Color variation was calculated by using CIELab (ΔE∗ab) and CIEDE2000 (ΔE00) methods. Then 95% confidence intervals were calculated for color variation means between baseline and 10 000 thermal cycles and between 10 000 and 20 000 thermal cycles. The 95% confidence intervals were also calculated for the means of individual color coordinates (L∗, a∗, and b∗).

Results. The dual-polymerizing cement had the highest color variation among all luting agents. No significant differences were found in color variation among the light-polymerizing materials. All agents showed ΔE∗ab>3.46 and ΔE00>2.25 after 20 000 thermal cycles. Variations in L∗, a∗, and b∗coordinates were material dependent. The dual-polymerizing agent was yellowish and reddish after aging.

Conclusions.

 The dual-polymerizing cement had higher color variation than the light-polymerized materials when used for bonding ceramic veneers to enamel. Flowable and preheated composite resins had similar color stability to that of light-polymerizing resin-based cement.

Original languageEnglish
Pages (from-to)272-277
Number of pages6
JournalJournal of Prosthetic Dentistry
Volume114
Issue number2
DOIs
Publication statusPublished - 01 Aug 2015

Fingerprint

Dive into the research topics of 'Resin-based luting agents and color stability of bonded ceramic veneers'. Together they form a unique fingerprint.

Cite this