A. A hernia is a protrusion of an organ or tissue through an abnormal opening in the body. Most hernias occur when a piece of intestine slips through a weakness in the abdominal wall, creating a bulge you can see and feel.
In order to become an orthodontist, students need to complete four years of dental school. Coursework in dental school includes anatomy, physiology and microbiology, as well as classes that apply more specifically to orthodontics, such as dental anatomy and occlusion, pediatric dentistry and dental materials.
Orthodontists are dentists who went on to complete a two-year residency program in orthodontics. They deal with more serious dental problems like issues with tooth and jaw alignment. Most people who have visited an orthodontist did so because their dentist advised them that they needed braces. Both are doctors who specialize in oral care, and both are technically dentists. 2  Orthodontists complete an additional two years of training in orthodontics, the treatment of irregularities in the teeth. 3  All orthodontists are dentists, but only 10 percent of dentists are orthodontists.