Keratinized tissue gain after free gingival graft augmentation procedures around teeth and dental implants: A prospective observational study

Aim The primary goal was to compare the amount of keratinized tissue width (KTW) gain after free gingival graft (FGG) procedures around implants and teeth after 6 and 12 months of healing. Materials and Methods Patients with mucogingival defects (<2 mm of KT) around teeth and implants underwent a gingival augmentation procedure by means of a FGG. Clinical measurements were performed with an individual stent to determine keratinized tissue width (KTW), length (KTL), graft shrinkage (GS) and gingival margin position (GMP) at 2 weeks, 6 weeks, 3 months, 6 months and 12 months after surgery. Results Twenty-nine patients (35 sites) participated in this prospective study. After surgery, KTW decreased and GS increased significantly in both treatment groups during the whole follow-up period, but the biggest changes were observed at 6 weeks. When comparing both treatment groups, implant sites showed significantly more reduction in KTW and more GS. Thus, at 12 months, KTW and GS reduced 2.03 +/- 2.1 mm and 36.74 +/- 38.2% in the teeth group and 2.91 +/- 12.03 mm and 61.8 +/- 36.25% around implants, respectively. Conclusions A significantly greater reduction in KTW and more GS might be expected at implant sites.