Keratinized gingival tissue insufficiency is one of the important factors for implant survival. The purposed of this study was to test collagen matrices (Mucograft® and Mucoderm®) aimed to increase keratinized tissue around dental implants when compared with free gingival graft (FGG).

Eighteen patients with 36 implants were included in the study. Participants were divided randomly into three groups, FGG were applied to the control group (CG), Mucograft® was applied test group 1 (TG1) and Mucoderm® was applied the test group 2 (TG2). Plaque index (PI), gingival index (GI), bleeding on probing (BoP), Probing depth (PD), the width of the keratinized mucosa (KMW) and thickness of keratinized mucosa (KMT) at augmentation site were measured. PI, GI, PD values of full mouth were obtained. These measurements were recorded at baseline, 1st, 3rd and 6th months after surgery.

In the terms of clinical parameters for augmentation area within and between groups; There is a statistically significant difference between the PI, GI, BoP, KMW, baseline values of the augmentation site and the values at the 1st, 3rd and 6th months (p <0.05). Baseline PI, GI, BoP values were found to be significantly higher than at 1st, 3rd and 6th months. This situation is valid for all groups. For all groups, baseline KMW values were found to be significantly lower than at 1st, 3rd and 6th months. There is no statistically significant difference between groups, in term of KMT.

In soft tissue augmentations made with different graft alternatives, the peri-implant keratinized gingiva width values increased compared to the beginning. No major differences were observed between autogenous graft (FGG) and porcine collagen graft materials (Mucograft and Mucoderm). The positive effect of this keratinized gingiva gain on gingival health was observed.