1. Curing potential and color stability of different resin-based luting materials.
- Author
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Schneider, Luis Felipe J., Ribeiro, Robson Barroso, Liberato, Walleska Feijó, Salgado, Vinícius Esteves, Moraes, Rafael R., and Cavalcante, Larissa Maria
- Subjects
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DENTAL cements , *TUKEY'S test , *WATER storage , *INFRARED spectroscopy , *COLORS - Abstract
• The amine-free dual-activated resin cement demonstrated improved color stability over the traditional one. • The amine-free and the pre-heated composite presented the highest color stability when considering the CIEDE2000 parameter. • The pre-heated composite presented the highest color stability when considering the CIELAB parameter. To determine the curing potential and color stability of resin-based luting materials for aesthetic restorations. Four resin-based luting agents were tested: traditional dual-activated resin cement (RelyX ARC, ARC), amine-free dual-activated resin cement (RelyX Ultimate, ULT), light-activated resin cement (RelyX Veneer, VEN), and pre-heated restorative resin composite (Filtek Supreme, PHC). Degree of C = C conversion was determined by infrared spectroscopy (n = 3) with direct light exposure or with interposition of 1.5-mm-thick ceramic (e.max Press HT) between the luting material and light. The curing potential considered the ratio between these two scenarios. Color difference (n = 6) was determined by CIELAB (Δ E ab) and CIEDE2000 (Δ E 00) methods, by spectrophotometer measurements made 24 h after photoactivation and 90 days after storage in water. Data was submitted to ANOVA and Tukey's test (α = 0.05). The luting agents affected both conversion and color stability. With ceramic, ARC produced the highest conversion among the tested groups (75 ± 1%) and the pre-heated composite (PHC) the lowest one (51 ± 3%), but the curing potential was similar for all materials. ULT produced lower Δ E ab than ARC. PHC presented the lowest color difference when considered both CIELAB and CIE2000 methods (Δ E ab 2.1 ± 0.4; Δ E 00 1.6 ± 0.2). All luting strategies presented high curing potential. Amine-free dual-activated material was able to reduce color difference than that formulated with the amine component. Pre-heated composite produced the least color variation after storage. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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