There are at least 13,000 species of lichens living throughout the world. Lichen species are so numerous and diverse that there are individual exceptions to most general statements about them.

The results of this preliminary study suggest that this mouthwash was a safe and effective therapy for reducing the signs and symptoms of oral lichen planus. However, the therapeutic effectiveness ...

Purpose: The stability of a triamcinolone acetonide mouthwash and its efficacy in treating oral lichen planus are described. Results: The mouthwash had a satisfactory shelf life and was well ...