The Therapeutic Effect of Curcumin in Nanogels Compared to 0.1% FAO in the Management of Oral Lichen Planus

Inclusion Criteria: * Age 18 years or older * Ability to provide written informed consent * Clinically and histopathologically confirmed diagnosis of erosive or atrophic oral lichen planus (OLP) * Presence of symptoms (NRS pain score \> 0 at baseline) * Ability to communicate and follow instructions * Willingness to apply oral paste treatment and comply with study protocol Exclusion Criteria: * Pregnancy or lactation * Current orthodontic treatment * Uncontrolled diabetes mellitus (HbA1c \> 7% or FPG \> 130 mg/dL) * Use of anticoagulants or antiplatelet agents * Severe dry mouth (Challacombe score \> 7) * History of gastric ulcers, duodenal ulcers, or gallstones * Presence of any active malignancy or infection * Use of topical/systemic treatment for OLP in the past 2 weeks * Current use of immunosuppressants * Known allergy to corticosteroids or herbal agents such as turmeric * Diagnosis of oral lichenoid contact lesion or graft-versus-host disease (GVHD) * History of allogeneic bone marrow transplantation * Current smokers