Does Backgrounds Color Influence the Appearance of Gingiva-Colored Resin-Based Composites? Pérez Gómez, María Del Mar Benavides Reyes, Cristina Tejada Casado, María de la Nativida Ruiz López, Javier Lucena Martín, Cristina Gingiva-colored resin-based composite Background Color Translucency This research was funded by the Spanish Ministry of Science, Innovation and Universities, grant number PGC2018-101904-A-100, the Government of Andalusia, grant number P20-00200, the University of Granada, grant number A.TEP.280.UGR18, and the APC was funded by the grant number PGC2018-101904-A-100. Dental materials are mainly tested in vitro, so laboratory conditions must reproduce the oral environment to ensure the validity of their results. This study aimed to evaluate the influence of backgrounds on the color of gingiva-colored resin-based composites (GCRBC). Three discs of each of 20 shades of GCRBCs and each thickness (1 and 2 mm) were prepared. Diffuse reflectance was measured on-air and over three natural teeth (0M3/B1, 3M3/B3, and 5M3/B4 shades of Vita 3D Master/Vita Classical guides, respectively) using a calibrated spectroradiometer, CIE D65 illuminant and the CIE 45 degrees/0 degrees geometry. CIEDE2000 color difference formula and its 50:50% perceptibility and acceptability thresholds have been used to calculate and interpret the results. It can be stated that the background influences the color of all GCRBCs tested, although the effect is more pronounced for 1 mm thick samples. L*, a* and b* coordinates values of GCRBCs on air were significantly different from those obtained on natural teeth backgrounds, and the total color differences were greater than the acceptability thresholds. Since GCRBCs are placed on a dental substrate in clinical conditions, it is not advisable to perform color measurements of GCRBCs on-air because of the high color differences found. This recommendation is especially relevant for thin specimens. 2022-06-15T06:28:03Z 2022-06-15T06:28:03Z 2022-05-22 info:eu-repo/semantics/article Pérez, M.M... [et al.]. Does Backgrounds Color Influence the Appearance of Gingiva-Colored Resin-Based Composites? Materials 2022, 15, 3712. [https://doi.org/10.3390/ma15103712] http://hdl.handle.net/10481/75489 10.3390/ma15103712 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MDPI