In the province of Ontario, people wishing to seek care with a Dental Hygienist working independently of a dentist have had the option to do so since 2007. Dental hygiene is a regulated profession governed by the College of Dental Hygienists of Ontario. You have the right to choose your Dental Hygienist just the same as you may choose a specific dentist to fill your cavities. Dental hygienists work to prevent tooth, gum and mouth diseases and injuries that can affect overall health.