To become an orthodontist, one must take science and math classes in high school like biology, chemistry, calculus and geometry. In college, they need to score highly on entrance exams like the SATs and ACTs to gain admission to top dental schools. The top 3 orthodontic programs are the University of Michigan, UCLA, and UCSF schools of dentistry. To practice, one must earn at least a PhD in dental or orthodontic science after obtaining a bachelor's degree and doctoral degree. The average annual income for an orthodontist is $186,320.