Effect of early membrane removal on regeneration of class II furcation defects in dogs - Macedo, Guilherme O.; Souza, Sérgio Luiz Scombatti de; Novaes Júnior, Arthur Belém; Grisi, Márcio Fernando de Moraes; Taba Júnior, Mário; Palioto, Daniela Bazan (Journal of Periodontology, 2006)