WHO/Godfrey Xuereb. Obesity has reached epidemic proportions globally, with at least 2.8 million people dying each year as a result of being overweight or obese. Once associated with high-income countries, obesity is now also prevalent in low- and middle-income countries.
Well the same goes for you teeth. An Orthodontist is specialized just in braces and such. A general dentist is more for fillings, extractions, cleanings, crowns, etc.
In the end, the main difference between dentists and periodontists is the course of their studies. And the best way to spend time with your dentist (vs. a periodontist) is by forming good oral hygiene habits.