Influence of cavity preparation with Er:YAG laser on enamel adjacent to restorations submitted to cariogenic challenge in situ: a polarized light microscopic analysis - Chimello, Daniela Thomazatti; Serra, Mônica Campos; Rodrigues Júnior, Antonio Luiz; Pécora, Jesus Djalma; Corona, Silmara Aparecida Milori (Lasers in Surgery and Medicine, 2008)