Augmentation of Peri-implant Keratinized Mucosa Using a Combination of Free Gingival Graft Strip With Platelet-Rich Fibrin

This clinical trial aims to evaluate the clinical effectiveness of combining a strip free gingival graft (sFGG) with Platelet-Rich Fibrin (PRF) for increasing keratinized mucosa around dental implants. The study compares this combined technique with the conventional free gingival graft (FGG) method through three primary objectives: 1. comparing the increase in keratinized mucosal height at immediate post-op, 1, 3, and 6 months; 2. assessing post-operative pain levels at 1, 3, 7, and 14 days; 3. evaluating soft tissue aesthetic outcomes at 6 months post-surgery.