Survival of dental implants in the cleft area: a retrospective study - Ferreira Júnior, Samuel de Barros; Esper, Luis Augusto; Sbrana, Michyele Cristhiane; Ribeiro, Ingrid Webb Josephson; Almeida, Ana Lúcia Pompéia Fraga de (The Cleft Palate-Craniofacial Journal, 2010)