Is there a professional body that regulates dental hygienists in Ontario? By The Meticulous Smile FAQJune 6, 20160 Back to Home Yes. In Ontario, the College of Dental Hygienists of Ontario registers dental hygienists. They ensure that all registrants are performing competent, safe, and ethical dental hygiene care for the public. Would you like to learn more? Go back to Frequently Asked Questions. Back to Home