This prospective controlled randomized blind clinical study investigated 44 implants
displaying lack of KG in 29 subjects. Fourteen subjects received FGGs followed by oral
prophylaxis. Fifteen subjects in the control group did not receive FGGs. The width of KG,
gingival recession (GR), pocket depths (PD), plaque index (PI) and gingival index (GI) were
assessed at baseline, 6, 12, and 18 months. Changes in crestal bone levels, from baseline,
were assessed at 18 months.