Autor(es): Fraga,May Anny Alves ; Correr-Sobrinho,Lourenço ; Sinhoreti,Mário Alexandre Coelho ; Carletti,Talita Malini ; Correr,Américo Bortolazzo
Data: 2021
Origem: Oasisbr
Assunto(s): Micro-computed tomography; bulk-fill composites; resin composites; internal adaptation; polymerization
Abstract This in vitro study aimed to evaluate the gaps length and depth of cure of dual-cure bulk-fill resin composites inserted in box-shaped preparations. Box-shaped preparations (4 mm deep) were made in fifteen human third-molars and divided into three groups according to the resin composites (n=5): Dual-cure bulk-fill BulkEZ (BEZ); Dual-cure bulk-fill HyperFIL (HF); and Tetric Evoceram Bulk-fill (TETRIC), as control. Gaps length (%) was evaluated in tooth-restoration interface with micro-computed tomography (µCT). The restorations were sectioned, and the degree of conversion (DC) and Knoop microhardness were evaluated at five depths (0.3, 1, 2, 3, and 4 mm). Microhardness data were statistically evaluated using absolute values (KHN) and relative values (microhardness percentages in relation to top). Gaps length (%) increased in the following order: BEZ=TETRIC
