Influence of the "gingival biotype" in buccal bone preservation around immediate implants with and without xenografts in flapless surgery - Palioto, Daniela Bazan; Maia, Luciana; Reino, Danilo; Novaes Júnior, Arthur Belém; Souza, Sérgio Luis Scombatti de; Taba Júnior, Mário (International Osteology Symposium, 2013)