Super Putty C-PRF/ Hyaluronic Acid Combination vs C-PRF in Gingival Phenotype Modification in Subjects With Thin Gingival Phenotype

Inclusion Criteria: 1. Systemically healthy male or female adults aged 20 to 40 years. 2. Non-smoker. 3. Presence of a clinically thin gingival phenotype (gingival thickness ≤ 1.0 mm) at the targeted surgical sites. 4. Presence of bilateral homologous teeth (e.g., both maxillary canines, or both mandibular first premolars) exhibiting the same thin gingival phenotype to allow for paired test and control sites within the same oral cavity. 5. Patients must demonstrate a high standard of oral hygiene, defined as a full-mouth plaque score and full-mouth bleeding score of ≤ 10% following initial cause-related therapy. 6. Willingness to comply with the 6-month follow-up schedule and provide written informed consent before enrollment. Exclusion Criteria: 1. Any systemic disease or condition known to compromise wound healing or alter immune response (e.g., uncontrolled diabetes mellitus, autoimmune disorders, bleeding dyscrasias). 2. Current or recent use of medications known to induce gingival enlargement (e.g., phenytoin, cyclosporine, calcium channel blockers) or medications affecting blood coagulation and platelet function (e.g., anticoagulants) within last 10 days of the procedure. 3. Active periodontitis, defined by probing depths \> 3 mm or bleeding on probing at the designated experimental sites 4. Any previous history of mucogingival surgery, soft tissue grafting, or local trauma at the selected test or control sites. 5. Current tobacco smoking or vaping, due to its well-documented detrimental effects on local angiogenesis and soft tissue grafting outcomes. 6. Pregnant or lactating females, due to hormonal fluctuations that can temporarily alter the gingival tissue response and capillary permeability.