Oral cancer kills more people nationwide than either cervical or skin (melanoma) cancer, and only half of patients diagnosed will survive more than five years. One American dies every hour from oral cancer. The most common risk factors are tobacco use, frequent high quantity alcohol consumption, constant sunlight exposure, habitual cheek or lip biting, or poorly fitting dentures. Although most oral cancers are found in people who use tobacco and/or drink alcohol excessively, 25% of oral cancers occur in people who have no risk factors at all.