A troche comprising at least 5 mg hyaiuronan, wherein the troche is adherent, and wherein hyaiuronan is released from the troche, is used to treat mucositis, including stomatitis, vestibulitis, aphthous ulcerations, lichen planus and Behcet's syndrome, A method for treating or preventing mucositis in a patient is provided, comprising applying to a mucosal surface or a tooth or orthodontic brace of a patient in need thereof an adhering troche comprising at least 5 mg hyaiuronan.