Making smiles in Stouffville healthier and brighter since 2005

Welcome to Dentistry on Main, conveniently located on Main St in Stouffville, Ontario. Here, our professionals know that dental health is not just about white smiles: it’s about having strong teeth and healthy gums. It’s about prolonging the simple joy of eating delicious things! Our mission is to help our patients accomplish these goals in a painless, compassionate, and efficient way.

We aim to educate our patients in a safe environment while offering them necessary comprehensive care. We understand that many people have anxiety about dental treatment, so we created a soothing environment and a scheduling system that never keeps you waiting long. By combining the latest technology with traditional techniques, we give our patients the best care that they deserve.

Dr. Amira Greiss, DDS

Dr. Amira Greiss is the owner of Dentistry on Main and grew up in Pickering, Ontario. She attended McMaster University and obtained an undergraduate degree in Life Sciences with genetics specialization. She then moved out west to Edmonton to attend the University of Alberta where she graduated as Doctor of Dental Surgery.

Dr. Greiss believes that to best serve her patients, it is important to continue to educate herself on the advances in the dental field. She is a certified provider for both Invisalign and Oral Moderate Sedation. She enjoys working with children and providing a comfortable treatment environment for all patients.

In her spare time, Dr. Greiss enjoys reading, skiing and honing her photography skills. She hopes to add interior design to her skill set through evening courses too!

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Dr. Greg Colinas, DDS

Dr. Greg Colinas has worked in private practice for over 25 years. He went to University of Western Ontario to obtain his undergraduate and Doctor of Dental Surgery degrees.

Dr. Colinas has a caring and understanding manner creates a welcome and comforting environment in which he endeavours to provide every patient with a positive dental experience. He enjoys all facets of dentistry including cosmetic dentistry, root canals, crown and bridge, dentures, implants and wisdom teeth extraction.

Dr. Colinas is a member of both the Ontario and Canadian Dental Associations and he currently lives in Markham with his wife and 2 girls.

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Francine - Office Manager/Receptionist

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Shawna - Dental Hygienist

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Faye - Dental Assistant

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Asma - Dental Assistant


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