Effect of thickness on shrinkage stress and bottom-to-top hardness ratio of conventional and bulk-fill composites - Santin, Daniella Cristo; Velo, Marilia Mattar de Amoêdo Campos; Camim, Francielly da Silva; Brondino, Nair Cristina Margarido; Honório, Heitor Marques; Mondelli, Rafael Francisco Lia (European Journal of Oral Sciences, 2021)