Tess 0.1 % Paste is used in the treatment of stomatitis a condition characterized by redness swelling and painful sores inside the mouth. Triamcinolone acetonide 0.1% dental paste is a prescription medicine used to treat painful lesions in the mouth. Like other corticosteroids triamcinolone has anti-inflammatory and antipruritic (anti-itch) properties. Corticosteroids are natural substances produced by the adrenal glands located adjacent to the kidneys. Corticosteroids have potent anti-inflammatory properties. Corticosteroids prevent release of chemicals that cause inflammation.