Meet Our Doctors

Our friendly doctors and office staff are always happy to assist new and existing patients throughout their dentist visits. They will help arrange your appointments, and follow-up visits and answer any questions and concerns that you may have.

Dr. Gary Clark, DDS


Gary is a board-certified periodontist, with 25 years experience. He has a broad and interesting educational and work history, including:
– BSc Biology and MSc in microbiology from Dalhousie University
– MBA from Dalhousie
– DDS and Dip PERIO from the University of Toronto.

Prior to undertaking his Periodontal specialty training, Gary spent four years as a Dental Officer in the Canadian Forces and has practiced mainly in the Guelph area since becoming a specialist. He is also a past president of the Canadian Academy of Periodontology. He loves practicing all aspects of periodontal care, and has extensive experience with dental implant surgery, site preparation and treatment of peri-implant disease.

Periodontal plastic surgery, including esthetic crown lengthening and gingival grafting are procedures of particular interest. Gary and his brew master wife, Sheila, are avid home brewers. When not developing new brew recipes, he also enjoys his many animal friends, sailing and being a home-chef. Gary is very approachable and easy going. He is looking forward to meeting you and discussing periodontal and implant treatment strategies with you soon.

Niagara Periodontics & Associated Specialties St. Catharines Dental office Dentist
Niagara Periodontics & Associated Specialties St. Catharines Dental office Dentist

Dr. Michael Duchnay, DMD


Dr. Michael Duchnay is a board-certified specialist in Oral Medicine. He took his clinical training in Oral Medicine at the University of Toronto, and successfully defended his M.Sc. (Oral Medicine) In the fall of 2013. Previously, he completed his undergraduate dental training at McGill University, and holds a B.Sc. (Hons.) in Laboratory Medicine and Pathobiology from the University of Toronto. He is a native of southwestern Ontario, having grown up in the town of Brantford.

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