Mild Gingival Recession

This is a prospective, single-arm, open-label, pilot clinical study to evaluate the efficacy and safety of topical 10% high-concentration 35 kDa hyaluronan (HA35) gel in subjects with mild gingival recession and chronic periodontal inflammation. Eligible participants will apply the HA35 gel topically to the gingival and tooth surfaces twice daily for 42 consecutive days. The primary objectives are to assess changes in gingival recession, chronic gingival or radicular pain, gingival redness and swelling, and brushing-induced bleeding. Safety and local oral tolerability will be evaluated throughout the treatment period. This is a minimal-risk, non-pharmacological, non-invasive oral care intervention.