Comparison of marginal adaptation and internal fit of monolithic lithium disilicate crowns produced by 4 different CAD/CAM systems - Ferrairo, Brunna Mota; Piras, Fernanda Furtado; Lima, Fernanda Ferruzzi; Honório, Heitor Marques; Duarte, Marco Antonio Hungaro; Borges, Ana Flávia Sanches; Rubo, José Henrique (Clinical Oral Investigations, 2021)