Dental assistants are key members of the dental healthcare team, ensuring clinics run smoothly and patients receive excellent care. For anyone exploring this career in Ontario, it’s important to understand the typical dental assistant job duties and responsibilities involved.
A dental assistant’s role spans both clinical support and administrative tasks – from helping the dentist during procedures to making patients feel comfortable. In fact, in Canada, dental assistants are crucial to public health, assisting dentists in various procedures and educating patients on proper oral care. While specific duties can vary by dental office, the core tasks remain consistent.
Let’s explore five common duties and responsibilities of a dental assistant.
What Are 5 Typical Dental Assistant Job Duties?
What are the duties of a dental assistant?
A dental assistant’s duties typically include both clinical and administrative tasks. Clinically, they assist the dentist during patient exams and procedures (passing instruments, suctioning, taking X-rays), sterilize instruments, prepare treatment rooms, and help manage patient care and comfort.
1. Preparing and Sterilizing Treatment Rooms and Instruments: One of the first daily tasks is to prepare the clinical area before patients arrive. Dental assistants clean and disinfect surfaces, lay out sterile trays, and ensure all necessary instruments and materials are ready for use.
2. Assisting the Dentist During Procedures: During examinations and treatments, dental assistants provide chairside support to the dentist. By actively assisting in restorative or surgical procedures, the assistant helps ensure everything goes smoothly for both the dentist and patient.
3. Taking and Developing Dental X-Rays: Many dental assistants are trained to take dental radiographs (X-rays) as part of their clinical duties.
In Ontario, a Level II dental assistant (with HARP certification) can expose and process X-ray images under the dentist’s direction. This duty involves positioning patients, using protective equipment, operating X-ray machines, and developing or digitally processing the images.

Most dental assistants in Canada complete a college-level dental assisting program and obtain certification (such as the NDAEB certificate) to perform expanded duties. To learn more, check out our guide on how to become a dental assistant in Canada.
4. Preparing Patients for Treatment & Ensuring Comfort: Dental assistants often greet and prepare patients for their procedures. Just as importantly, assistants provide reassurance, answering initial questions and helping anxious patients relax. Patient care is at the heart of the dental assistant’s role, so being friendly and calming is essential.
5. Educating Patients on Oral Hygiene: A dental assistant’s job doesn’t end when the patient leaves the chair. They often provide patient education on oral health. This might involve teaching proper brushing and flossing techniques, advising on post-treatment care, or explaining how diet affects dental health. These varied dental assistant duties and responsibilities make the job diverse and never boring.

What does a dental assistant do in Canada?
In Canada, dental assistants perform the same broad range of duties mentioned above, with some variations depending on provincial regulations. They assist dentists and hygienists in treating patients and also perform clerical functions. For a real-world perspective, you can also read about a typical day on the job of a dental assistant.
A Key Role in Ontario Dental Offices
Dental assistants truly form the backbone of a dental practice, and this is especially true in Ontario, where demand for oral healthcare is high. If you are detail-oriented, compassionate, and ready to start a fulfilling career, now is the time to begin your journey.
Medix College’s Dental Assisting program offers the hands-on training and real-world experience you need to succeed in this in-demand field.
Are you looking for a comprehensive Dental Assistant Program in Ontario?
Contact Medix College for more information. We’re here to help you achieve your goals in dental healthcare!
Frequently Asked Questions
Question: What are the duties of a dental assistant?
Answer: A dental assistant’s duties typically include both clinical and administrative tasks. Clinically, they assist the dentist during patient exams and procedures (passing instruments, suctioning, taking X-rays), sterilize instruments, prepare treatment rooms, and help manage patient care and comfort.
Question: What does a dental assistant do in Canada?
Answer: In Canada, dental assistants perform the same broad range of duties mentioned above, with some variations depending on provincial regulations. They assist dentists and hygienists in treating patients and also perform clerical functions.
Question: What is the most important part of the role of a dental assistant?
Answer: While dental assistants have many responsibilities, arguably the most important part of the role is ensuring quality patient care and support.