Behcet's Syndrome - Similar ulcers occur in the mouth and on the genitalia, and the eyes are involved.

Bruxism - Tooth grinding

Burning Mouth Syndrome

Canker Sores - Also called APHTHOUS STOMATITIS, a small, painful ulcer of the oral cavity. Canker sores are round, shallow, white ulcers on the inner surface of the cheek or lip.

Cherubism

Cleft Lip - Relatively common (one out of every 1,000 births) congenital deformity in which the central to medial lip fails to fuse properly during the first month of prenatal life, resulting in a fissure in the lip beneath the nostril.

Dentigerous Cyst

Glossitis, Benign Migratory - Inflammation of the tongue. A condition that gives the affected area a smooth, red appearance. It may be the primary disease, or may be a symptom of one of several hereditary and acquired conditions, bright red areas on the tongue, surrounded by a narrow white zone.

Herpes Labialis (Fever Blisters) - Generally associated with infections in and around the mouth and with other herpes simplex infections above the waist. Typically it is characterized by a cluster of small blisters or watery vesicles on the skin or on mucous membrane. The lesions are commonly called cold sores or fever blisters.

Ludwig's Angina - A condition marked by severe pain in the chest, often also spreading to the shoulders, arms, and neck, owing to an inadequate blood supply to the heart.

Macroglossia - Enlargement of the tongue, due to over development of the muscle mass or the accumulation of material within the tongue.

Periodontal Diseases - Smoking has been linked for several decades with an increased risk of various health problems, including periodontal disease.

Pierre Robin Syndrome

Prognathism

Salivary Gland Diseases

Sialorrhea

Stomatitis, Aphthous - A small, painful ulcer of the oral cavity. Canker sores are round, shallow, white ulcers on the inner surface of the cheek or lip.

Temporomandibular ( Joint Disorders ) - The temporomandibular joint, skin over part of the ear, and skin over the sides of the head above the ears. 

Tumor, Warthin ( --> Salivary Gland Diseases)

Warthin's Tumor ( --> Salivary Gland Diseases)

Xerostomia - Dryness of the mouth, often coupled with enlargement of the salivary glands.