Viegas, D. C.; Canhão, R.; Riquieri , H. .; Saavedra, G.; Palmela, A.; Hermínio, J.; Roque, J. C. Influence of the Background, Substrate and Thickness in Light Behaviour and Colour of Zirconia-Reinforced Lithium Silicate (ZLS) Glass-Ceramic. BDS 2021, 24.