Color difference of composite resins after cementation with different shades of resin luting cement

Abstract

The purpose of this study was to evaluate the color difference of nanohybrid and ormocer-based composite resins with different thicknesses when 4 different shades of resin luting cement were used. 56 disc specimens of each composite resin (Aelite aesthetic enamel, Ceram-X mono) with 0.5 and 1 mm thicknesses were fabricated. Baseline color measurements were performed using a clinical spectrophotometer. The specimens of each thicknesses of each resin were randomly divided into 4 groups according to the shades of resin luting cement (white/A1, yellow/universal/A3, transparent and white opaque) (n = 7). Mixed resin cement was applied onto the resin specimens using a Teflon mold in 0.1 mm thickness. Color measurements of cemented composite resin specimens were repeated and color difference (∆E) between baseline and after cementation measurements was calculated. ANOVA and Tukey's test were used for statistical analysis. The opaque shade had significantly increased ∆E values as compared to the other shades (p < 0.05). For all shades except white opaque in both thicknesses, ∆E values of aelite aesthetic enamel were higher as compared to Ceram-X mono. There is no significant difference between 2 thicknesses for both resins in terms of ∆E values. The shade of resin cement and the type of the resin affected the final color; however, the thickness of composite resin had no influence on the final color of restoration. Selecting the shade of resin luting cement before cementation of indirect composite laminate restoration is important to achieve final color match.

Effect of cement color and tooth‐shaded background on the final color of lithium disilicate and zirconia‐reinforced lithium silicate ceramics: An in vitro study

“…A study by Cengiz et al 30 White opaque cement color was also used since previous studies confirmed its masking ability in some conditions. 8,10 Bacchi et al 8 evaluated the masking ability of different CAD/CAM blocks with an opaque luting cement using specimens with a 1.8 mm thickness and an A3,5 background.…”

“…A study by Cengiz et al 30 that evaluated the effect of cement color on the final color of composite resin specimens found that an opaque cement color results in a higher color change than a translucent cement color. In accordance with the findings of Cengiz et al 30 in this study, the opaque cement color exhibited significantly higher color change than the translucent cement color over the light (A1) tooth‐shaded background. In addition, the opaque cement color showed a higher color difference (Δ E 00 > 2.25) within the light (A1) tooth‐shaded background for both the LDS and ZLS groups, resulting in whiter optical results.…”

Evaluation of shade matching in the repair of indirect restorative materials with universal shade composites

“…For practical interpretation of color differences, the following thresholds are used: ΔE>1 can be detected by observers; ΔE<3.3 is clinically acceptable ( 31 ). Acceptability thresholds are also evaluated in the literature with different values such as ΔE<2.72 or ΔE<3.7 ( 32 , 33 ). To reduce or eliminate the inconsistencies of traditional shade matching, spectrophotometers are preferred, which are useful, reliable, and provide mobility in shade matching ( 34 ).…”

“…To reduce or eliminate the inconsistencies of traditional shade matching, spectrophotometers are preferred, which are useful, reliable, and provide mobility in shade matching ( 34 ). It is possible to evaluate the clinical color performance of restorative materials using intraoral spectrophotometers which are used in clinical and laboratory settings in many studies ( 30 , 33 ). Spectrophotometers with an internal light source used in contact mode have been reported to be unaffected by ambient light ( 35 ).…”

Avaliação da alteração de cor, inicial e tardia, de cimento resinoso fotopolimerizável

“…Os cimentos resinosos são apresentados em diferentes tonalidades, com o intuito de permitir uma seleção satisfatória da coloração de cimento adequada para estratificar e aumentar a precisão final de cores, tendo como objetivo obter uma estética satisfatória (CENGIZ et al, 2018).…”