Impact of background on color, transmittance, and fluorescence of leucite based ceramics

Rafael, Caroline Freitas; Güth, Jan-Frederik; Colle Kauling, Ana Elisa; Cesar, Paulo Francisco; Maziero Volpato, Claudia Angela und Liebermann, Anja (2017): Impact of background on color, transmittance, and fluorescence of leucite based ceramics. In: Dental Materials Journal, Bd. 36, Nr. 4: S. 394-401

Abstract

This study evaluated the impact of tooth shade on differences in color (Delta E), lightness (Delta L), chromaticity coordinates a*/b* (Delta alpha and Delta b), transmittance and the degree of fluorescence of CAD/CAM leucite based ceramic (LBC). Ten disks were fabricated of LBC;Empress CAD, A2, thickness of 1.5 mm and eight disks of resin-nano-ceramic (RNC;Lava Ultimate) in different colors to simulate variations in substrate shade. The associations of LBC disks with different color substrates were analyzed with a spectrophotometer;AE, Delta L*, Delta a*, Delta b*, and transmittance were measured and calculated. Fluorescence was evaluated with a fluorescence system (Fluorescence System, Biopdi). All substrate shades influenced the optical properties of LBC, with regard to color, luminosity, coordinate a* and b*, transmittance, and fluorescence (p<0.001). Substrate colors with high saturation (A3.5 and C2) presented highest impact, whereas colors with lowest saturations (BL, B1) showed less impact. Substrate color influenced the optical properties of ceramic restorations.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Medizin
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• ISSN: 0287-4547
• Sprache: Englisch