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Cosgarea, Raluca; Gasparik, Cristina; Dudea, Diana; Culic, Bogdan; Dannewitz, Bettina; Sculean, Anton (2015). Peri-implant soft tissue colour around titanium and zirconia abutments: a prospective randomized controlled clinical study. Clinical oral implants research, 26(5), pp. 537-544. Wiley-Blackwell 10.1111/clr.12440
