Color Change Evaluation of Three Universal Resin Composites after Storage in Water: An In Vitro Study

Abstract

Aim: The aim of this in vitro study was to evaluate the color changes of three different universal resin composites after immersion in distilled water for one month. Materials and Methods: Omnichroma, Estelite Σ Quick, and Filtek Universal Restorative were investigated. Ten disk shaped specimens (6 mm diameter, 2 mm thickness) were prepared according to the manufacturers’ instructions for each material. After polishing, initial color measurements were taken followed by individual storage of the specimens in distilled water at 37 °C for one month when color measurements were repeated. The change in the color of each resin composites (Δ E00) was calculated with a digital method, using the CIEDE2000 color difference formula. The data were analyzed using one-way ANOVA followed by Tukey post-hoc test ( P < .05). Results: All resin composites exhibited acceptable color change after one month. Omnichroma exhibited the highest color change (2.26 ± 0.48) value while Filtek Universal Restorative showed the lowest (1.14 ± 0.38) value. All color parameters influenced the Δ E00 values in all groups except Filtek Universal for Δ L* and Δ b values. Conclusion: When performing composite resin restorations, especially for esthetic purposes, polymerization may lead to change in the color of restorative material over time, but it should be considered whether this is within acceptable limits.

Effect of Cavity Dimensions on Color Adjustment of Single-Shade versus Multi-Shade Resin Composite Restorations: An In Vitro Study

“…The current trend toward simplification and shortening of clinical restorative treatment are two of the main reasons behind the development of universal (single shade) resin composites that can match a wide variety of classical shades (42,43) . The "blending effect" term was used to describe the color interaction between restorative materials and tooth tissues (18) . This effect works for the clinician by minimizing or neutralizing color mismatches.…”

“…The shades of the commercially available resin composites are usually labelled following the VITA classical shade system. They are marketed in different enamel, dentin, body, and opaque shades to simulate the color of tooth structures (17,18) . However, one of the limitations of resin composites is the incompatibility of their shades to those they are designated to match (19) .…”

“…Spectrophotometers measure the spectral composition of the reflected light by the tooth at 1-25nm intervals within the visible spectrum and convert it into quantifiable data (32,33) . They are in compliance with the standard viewing and illumination parameters set by the Commission Internationale de I'Eclairage (CIE, International Commission on Illumination) (18) . Spectrophotometers display the results as L*, a*, and b* values (34) .…”

“…This unique ability was attributed to the inclusion of spherical zirconium dioxide (ZrO 2 ) and silicon dioxide (SiO 2 ) fillers with uniform size of 260 nm in the resin matrix, which could produce a red-to-yellow color (14,38) . The use of OMNICHROMA minimizes shade selection, simplifies clinical protocols, and reduces chairside time (18) . Recently, a light cured radiopaque resin composite material, OMNICHROMA BLOCKER (Tokuyama Dental Corporation, Tokyo, Japan) was launched by the same manufacturer of OMNICHROMA.…”

Hard x-ray nanotomography of dental composites for wide color matching

“…Four dental composites for wide color matching were selected and purchased. These filling materials were Omnichroma PLT (Tokuyama Dental, Tokyo, Japan) [3,4], Filtek Universal (3M, St. Paul, USA) [5], ArtOral Chroma Fill (R-dental, Hamburg, Germany) [6], and Venus Pearl One (Kulzer, Hanau, Germany) [7].…”