Repair of furcal perforation treated with mineral trioxide aggregate in a primary molar tooth: 20-month follow-up - Oliveira, Thais Marchini; Sakai, Vivien Thiemy; Silva, Thiago C.; Santos, Carlos Ferreira dos; Machado, Maria Aparecida de Andrade Moreira; Abdo, Ruy Cesar Camargo (Journal of Dentistry for Children, 2008)