@misc{10481/111398,
year = {2026},
month = {4},
url = {https://hdl.handle.net/10481/111398},
abstract = {Objectives: To evaluate the effect of aging on the color and whiteness of single- and group- shade resin composites 
in restorations with different cavity configurations and dental shades.
Methods: Class I and V cavities (length of 8.0 mm, depth of 2.0 mm and width of 2.5 mm) were prepared in 
artificial acrylic mandibular right molars with different shades (A1, A2, A3, A3.5, and A4). Three single- (OMNI- 
Omnichroma, UNI- Vittra APS Unique, CHA- Charisma Diamond ONE) and two group-shade (FIL- Filtek Uni
versal Restorative, HAR- Harmonize) resin composites were evaluated. The ISO 4892–2 was used to perform the 
accelerated artificial aging (AAA). Spectral reflectance measurements were obtained and CIELAB color co
ordinates were calculated (CIE D65 standard illuminant and 2º CIE1931 Standard Observer) at baseline and after 
AAA. CIEDE2000 color differences (ΔE00), %ΔL00, %ΔC00, %ΔH00 and whiteness variations (ΔWID) were 
calculated. Generalized linear models (GLM) were used for the comparison between combined groups (shade, 
aging, and cavity configuration) for each outcome individually and all possible associations between groups (α =
0.001). The corresponding perceptibility (PT00 =0.8 and WPT =0.7) and acceptability (AT00 =1.8 and WAT =
2.6) thresholds were used for the analysis of the results.
Results: In general, the color stability of single- and group-shade composites after aging was better for Class V 
restorations, presenting lower ΔE00 and ΔWID values. For Class I restorations, group shade composites (FIL and 
HAR) exhibited lower ΔE00 and ΔWID values; FIL generally showed the lowest ΔE00 and ΔWID values for both 
Class I and Class V restorations. These values were below the AT00 and WAT values for Class V restorations, but 
above the AT00 and WAT values for Class I restorations.
Clinical significance: The influence of cavity configuration on color and whiteness stability indicates that resto
ration geometry should be considered when predicting long-term shade matching and esthetic durability of 
single- and group-shade composites.”},
organization = {MICIU/AEI/10.13039/501100011033 and FEDER, UE- (PID2022.142151OB.I00)},
organization = {Consejería de Universidad, Investigación e Innovación and by FEDER Andalusia Program 2021–2027 - (C-EXP-276-UGR23)},
organization = {Universidad de Granada/CBUA - (Open access charge)},
publisher = {Elsevier},
keywords = {Color},
keywords = {Dentistry},
keywords = {Aging},
title = {Effect of aging on color and whiteness of single shade and group shade resin composites in restorations with different cavity configurations},
doi = {10.1016/j.dental.2025.12.005},
author = {Gabardo Perez Mariano da Rocha, Bibiana and Pecho, Oscar E. and Brandão Durand, Letícia and Ruiz López, Javier and Pérez, María M.},
}