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.
Becoming an orthodontist requires many years of education. Orthodontists must attend college and medical school, and then complete an additional two years of specialized training. Orthodontists make up the largest group of specialized dentists, and job prospects in coming years are expected to be good.
The main focus for someone in college is to get into dental school. Then you have to be in the top (5-10%) of your dental school class to get into orthodontics. As long as you meet the pre-requisite courses, there is no required undergrad major when applying to dental school.