When people go to a dentist for routine cleaning or a tooth ache, the dentist will always take x-rays (radiographs). You may wonder what can be seen with x-rays that cannot be seen with the naked eye. Radiographs of the mouth and sinuses allow both human dentists and veterinarians to see bone, the roots of teeth, and soft tissues. Unfortunately, all of these structures are susceptible to diseases, such as abscesses, infection, decay, retention of baby teeth, and certain cancers. In fact, as much as 60% of all dental disease occurs below the gumline.