Effects of sandblasting before orthophosphoric acid etching on lingual enamel: in-vitro roughness assessment - Robles-Ruíz, Julissa Janet; Arana Chavez, Victor Elias; Ciamponi, Ana Lídia; Abrão, Jorge; Kanashiro, Lylian Kazumi (American Journal of Orthodontics and Dentofacial Orthopedics, 2015)