College of Dental Hygienists of Ontario
The College of Dental Hygienists of Ontario regulates the practice of dental hygiene in the interest of the overall health and safety of the public of Ontario.

Self-Service-E  FAQ-E


Dental hygienists in Ontario are governed by the Regulated Health Professions Act, 1991 (RHPA) and Dental Hygiene Act, 1991 (DHA). There are a number of regulations made under the DHA with which all registered dental hygienists in Ontario must comply. In accordance with section 31 of O. Regulation 218/94, which deals with registration, you must: 

Supply proof that you have graduated from a full-time program, accredited by the Commission on Dental Accreditation of Canada or by the American Dental Association Commission on Dental Accreditation,  and successfully complete the exam set by the National Dental Hygiene Certification Board (NDHCB). 


Supply proof that you have successfully completed a program in dental hygiene that the Registration Committee considers to be substantially equivalent to an accredited program, and successfully complete the clinical competency evaluation set or approved by the Registration Committee.

If you graduated more than three years prior to the application and have not practised dental hygiene in a recognized jurisdiction within the three years, you must successfully complete a clinical refresher course or professional competency assessment, set or approved by the Registration Committee.

In addition to the educational requirements, applicants must also:

  • Submit a police record check that is dated no earlier than one (1) year before the date on which the application was submitted.
  • Provide a certificate of professional conduct completed by the regulatory body in any jurisdiction where you practised dental hygiene or any other regulated profession.
  • Be a Canadian citizen or the holder of permanent resident status in Canada or be authorized under the Immigration and Refugee Protection Act (Canada) to engage in the practice of the profession.
  • Provide proof of current professional liability insurance coverage.
  • The CDHO requires an applicant to have reasonable fluency in either English or French. This language proficiency is assessed informally through the applicant's ability to successfully complete the National Dental Hygiene Certification Exam and CDHO's clinical exam. No additional language assessments are required.
  • Pay the applicable fees.