Mechanical preparation showed superior shaping ability than manual technique in primary molars: a micro-computed tomography study - Hidalgo, Lidia Regina da Costa; Silva, Léa Assed Bezerra da; Leoni, Graziela Bianchi; Mazzi-Chaves, Jardel Francisco; Carvalho, Emily Eduardo da Silva; Consolaro, Alberto; Sousa Neto, Manoel Damião de (Brazilian Dental Journal, 2017)