What most naturally follows?

How to become a periodontist
Pursue a bachelor's degree.
To be a periodontist, you need to attend dental school and 3 years of specialized training in the field of periodontics. In order to qualify for either of these, you must first get a bachelor's degree.
You don't necessarily need to focus on pre-medicine, biology, or other scientific fields, but they may help you get into and excel at dental school. Consider taking courses in chemistry, biology, biochemistry, and anatomy once you decide to pursue periodontics.