Long-term stability of peri-implant tissues after bone or soft tissue augmentation. Effect of zirconia or titanium abutments on peri-implant soft tissues. Summary and consensus statements. The 4th EAO Consensus Conference 2015 (2015) Sicilia A, Quirynen M, Fontolliet A, Francisco H, Friedman A, Linkevicius T, Lutz R, et al. Journal article Long-term outcomes of bone augmentation on soft and hard-tissue stability: a systematic review (2015) Lutz R, Neukam FW, Simion M, Schmitt CM Journal article Effect of deproteinized bovine bone matrix coverage on the resorption of iliac cortico-spongeous bone grafts - a prospective study of two cohorts (2014) Wiltfang J, Jaetschmann N, Hedderich J, Neukam FW, Schlegel A, Gierloff M Journal article Long-term changes in graft height after maxillary sinus augmentation, onlay bone grafting, and combination of both techniques: a long-term retrospective cohort study (2014) Schmitt C, Karasholi T, Lutz R, Wiltfang J, Neukam FW, Schlegel KA Journal article The effect of load on heat production, thermal effects and expenditure of time during implant site preparation - an experimental ex vivo comparison between piezosurgery and conventional drilling (2014) Stelzle F, Frenkel C, Riemann M, Knipfer C, Stockmann P, Nkenke E Journal article The bone-metal interface of defect and press-fit ingrowth of microwave plasma-chemical vapor deposition implants in the rabbit model (2005) Rupprecht S, Bloch-Birkholz A, Lethaus B, Rosiwal S, Neukam FW, Schlegel A Journal article, Original article