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

Inclusion Criteria: * Patients meeting the following criteria are eligible for the study: * Prosthetic Phase: Patients scheduled for the prosthetic phase of dental implant treatment. * Keratinized Mucosa: Keratinized mucosa height (buccal or lingual) of less than 2 mm around the implant. * Systemic Health: Systemic health status classified as ASA I or II according to the American Society of Anesthesiologists classification. * Oral Hygiene: Good oral hygiene, defined by a mean full-mouth plaque index (PlI) of ≤ 1. Exclusion Criteria: * Patients meeting any of the following criteria will be excluded from the study: * Systemic Conditions: Presence of systemic diseases or use of medications known to affect the oral mucosa or gingival health. * Periodontal Health: Untreated periodontal disease and/or peri-implant diseases. * Surgical History: History of mucogingival surgery at the intended surgical site. * Pregnancy/Lactation: Pregnant or breastfeeding women. * Oral Hygiene: Poor oral hygiene, defined by a mean full-mouth plaque index (PlI) \> 1. * Smoking: Current smokers.