Study of Hyaluronic Acid Used With Gum Surgery to Treat Gum Recession in Adults

Inclusion Criteria: * \- Age ≥ 18 years, in good general health (ASA I or II) * Presence of a single gingival recession defect classified as RT1 or RT2 * Recession depth ≥ 2 mm with identifiable cemento-enamel junction (CEJ) * Presence of at least 1 mm of keratinized tissue at the defect site * No active periodontal disease (probing depth ≤ 4 mm and no bleeding on probing at the selected tooth) * Full-Mouth Plaque Score (FMPS ≤ 20%) and Full-Mouth Bleeding Score (FMBS ≤ 20%) * Vital tooth without caries, cervical lesions, or defective restorations * Good oral hygiene and motivation to maintain plaque control * Ability and willingness to comply with study procedures * Signed informed consent Exclusion Criteria: * Uncontrolled systemic diseases (e.g., uncontrolled diabetes, severe cardiovascular disease, immunodeficiency) * Pregnant or breastfeeding women * Autoimmune diseases or immunosuppressive therapy * Known hypersensitivity to hyaluronic acid * Heavy smokers (\>10 cigarettes/day) or recent tobacco use * Active periodontal disease at the study site * Caries, root fractures, endodontic lesions, or defective restorations at the study tooth * Previous mucogingival surgery at the study site * Recent use of antibiotics, corticosteroids, or anti-inflammatory drugs * Coagulation disorders or anticoagulant therapy contraindicating surgery * Hormonal disorders affecting wound healing * Acute oral infections * Any condition that may interfere with study participation or follow-up