Color Shift, Color Stability, and Post-Polishing Surface Roughness of Esthetic Resin Composites

Abstract

The aim of this study was to compare color shift, color stability, and post-polishing surface roughness of esthetic restorative materials. Twenty-five disc-shaped specimens (10 mm in diameter and 2 mm in thickness) from five esthetic resin materials (Z250XT, IPS Empress-Direct, G-ænial, Vit-l-escence, and Ceram.X) were fabricated. Color shift before and immediately after light-curing (∆E0) then color stability after immersion in tea, coffee, berry juice, and distilled water were measured using a spectrophotometer. Color changes were measured after 2 (ΔE2), 4 (ΔE4), 6 (ΔE6), and 8 weeks (ΔE8). Surface roughness values (Rq) were determined using an optical profilometer after polishing using a rotary polishing system. Data were analyzed using ANOVA and multiple comparison methods at 0.05 significance level. There were no significant differences between the tested materials regarding color shift except between Vit-l-escence and Ceram.X (p = 0.033). There was no significant difference between coffee and tea solutions (p = 1.0) and between berry juice and distilled water (p = 0.15). There was no difference between the tested materials regarding Rq (p = 0.057). Ceram.X was associated with the lowest ΔE8 values overall. Tested materials were comparable regarding color shift and post-polishing surface roughness. Susceptibility to staining was dependent on the material.

Color stability of an artificially aged nanofilled composite resin post-cured with different techniques

“…The optical properties of composite resins change based on the photopolymerization received, and the extent of change is affected by the characteristics of the material and the wavelength emitted by the polymerizing unit. 4 , 10 , 11 In the present study, both the material and the light-emitting source were standardized so that these variables would not interfere with the results, providing a proper assessment of the post-curing effect. Further studies should be performed to analyze the effect of these variations, especially with new materials and light-emitting sources.…”

“…The first factor might be the material selected because the nanofilled composite resin tested in the present study has shown high staining ability. 3 , 10 Another factor that might have contributed to the great color change was the inclusion of daily coffee immersions, with a high staining ability on the composite resin. 10 Coffee contains many ingredients, among which there is a considerable amount of hydrosoluble dyes and acids.…”

“… 3 , 10 Another factor that might have contributed to the great color change was the inclusion of daily coffee immersions, with a high staining ability on the composite resin. 10 Coffee contains many ingredients, among which there is a considerable amount of hydrosoluble dyes and acids. 18 Hence, coffee staining is considered strong and persistent, although its molecule does not impregnate the material deeply.…”

Surface Integrity of Dimethacrylate Composite Resins with Low Shrinkage Comonomers

“…Color stability can be assessed by instrumental and visual methods. The used Spectrophotometry in this study has proven to be a sound method in composite resins research, being capable of suppressing the individual analysis of visible color comparison [ 29 ]. All tested composite resins showed similar measurements of color change (∆E) during the 7 days except for HE-EC3 and HE-EC4 ( Figure 4 ).…”

Discoloration of Resin Composites Induced by Coffee and Tomato Sauce and Subjected to Surface Polishing: An In Vitro Study

“…Color modification is a major reason for changing composite restorations, especially in the anterior region. Color stability of composite restorations is necessary to mimic and preserve the appearance of natural teeth and to satisfy patients' demands [3].…”