@misc{10481/109571,
year = {2025},
url = {https://hdl.handle.net/10481/109571},
abstract = {Objectives: To evaluate the influence of aging on color and optical properties of 3D printing resin-based dental restorative materials. 

Methods: Four 3D printing resin-based dental restorative materials (DFT- Detax Freeprint Temp; FT- Formlabs Temporary CB; FP- Formlabs Permanent Crown; and GCT- GC TempPrint) were evaluated. The structures were printed using digital light processing (DLP) (DFT and GCT groups) and stereolithography (SLA) (FT and FP groups) technologies. Samples (10 × 10 × 1 mm; n = 3) were printed in light (L) and medium (M) shades and at 0◦ and 90◦ and then polished to a thickness of 1.00 ± 0.01 mm with silicon carbide (SiC) sandpapers under water cooling. Artificial aging followed the ISO 4892–2 standard. 1) Color differences were evaluated using CIEDE2000 and perceptibility and acceptability thresholds (PT00 and AT00), 2) spectral reflectance (R%) and transmittance (T%) were measured and scattering (S) and absorption (K) coefficients, light reflectivity (RI), infinite optical thickness (X∞) pre- and post-aging were calculated using Kubelka-Munk method and Root Mean Square Error (RMSE) and Goodness of Fit (GFC) were used as performance optical behavior. 

Results: 1) All 3D-printed dental resins evaluated, irrespectively of the printed angles, showed mean ΔE00 values above AT00 (.ΔE00> 1.8), and FT-M and FP-M showed the least color changes among the evaluated materials, 2) GFC<0.999 and RMSE >2 % values were found between pre and post aging for R%, T%, S, K, RI and X∞ properties. 

Conclusions: This study showed poor spectral match and comparative spectral values of R%, T%, S, K, RI and X∞ between after and before aging, resulting in unacceptable color changes. Printing orientation does not influence the change of the optical behavior of the evaluated materials after aging. 

Clinical significance: Aging causes significant changes on the spectral optical behavior for the 3D-printed resinbased restorative materials studied, resulting in clinically unacceptable color changes.},
organization = {This study was partially supported by the following grants: PID2022.142151OB.I00 funded by MICIU/AEI/10.13039/ 501100011033 and by FEDER, UE; C-EXP-276-UGR23 funded by Consejería de Universidad, Investigaci´on e Innovaci´on and by FEDER Andalusia Program 2021–2027; 406418/2023-3 funded by Conselho Nacional de Desenvolvimento Científio e Tecnologico, CNPq do Brasil; 406436/2022-3 INCT_3D-Saude funded by MCTI e CNPq do Brasil.},
publisher = {Elsevier},
title = {Effect of aging on optical behavior and color of 3D printing resin-based dental restorative materials},
doi = {https://doi.org/10.1016/j.jdent.2025.105734},
author = {Pérez Gómez, María Del Mar and Espinar Pulgar, Cristina and Pecho Yataco, Oscar Emilio and Tejada Casado, María de la Nativida and Della Bona, Álvaro},
}