Clinical outcomes of socket preservation using bovine-derived xenograft collagen and collagen membrane post-tooth extraction: a 6-month randomized controlled clinical trial - Iorio-Siciliano, V; Blasi, A; Nicolò, M; Iorio-Siciliano, A; Riccitiello, F; Ramaglia, L (Int J Periodont Restor Dent, 2017)