Oral surgery II: Part 4. Common oral lesions British Dental Journal Pathology Outlines Melanotic macule Intraoral melanoma located at the interproximal madibular teeth gingiva ORAL MELANOTIC MACULE (OMM) (Also called focal melanosis labial melanotic macule) A benign, localized, flat pigmented lesion of the oral mucosa Caused by a focal increase in melanin production Dentistry and Medicine: Pigmentation and Discoloration of Oral and Facial Tissues