The effects of interimplant distances on papilla formation and crestal resorption in implants with a morse cone connection and a paltaform switch: a histomorphometric study in dogs - Novaes Júnior, Arthur Belém; Oliveira, Rafael R. de; Muglia, Valdir Antônio; Papalexiou, Vula; Taba Júnior, Mário (Journal of Periodontology, 2006)