Fig. 2From: Interaction of titanium, zirconia and lithium disilicate with peri-implant soft tissue: study protocol for a randomized controlled trialTissue sampling. a Clinical situation after applying the stamping press around the zirconia abutment. b After removing the gingival ring biopsy and the zirconia abutment. c After inserting the titanium abutment. d Gingival ring biopsyBack to article page