Does Backgrounds Color Influence the Appearance of Gingiva-Colored Resin-Based Composites?
MetadataShow full item record
AuthorPérez Gómez, María Del Mar; Benavides Reyes, Cristina; Tejada Casado, María de la Nativida; Ruiz López, Javier; Lucena Martín, Cristina
Gingiva-colored resin-based compositeBackgroundColorTranslucency
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]
SponsorshipSpanish Government PGC2018-101904-A-100; Government of Andalusia P20-00200; University of Granada A.TEP.280.UGR18
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.