Dr Leon Treger

Dr. Leon Treger is a general dentist with more than 25 years experience.  He brings a knowledge of holistic health care into the practice of his general practice. He believes that a  holistic approach to the everyday practice of dentistry can and does improve the effectiveness of various dental procedures. He includes cranial therapy, nutrition, herbal and homeopathic remedies in his treatment considerations.

Dr sheldon cooper

Dr Sheldon Cooper is a seasoned and highly experienced dentist, serving the North York Community for nearly 40 years! He graduated from University of Toronto in 1979, and has been honing his skills ever since then. Dr. Cooper focuses on continuing education in dentistry as well as educating his patients to achieve and maintain great oral health. Dr. Cooper enjoys swimming, reading, walking his dog, and more recently yoga.

Dr George lee


Dr Kevin Treger

Dr Kevin is a graduate of Boston University School of Dental Medicine, and has completed several courses in Oral Implantology. He also works with Ontario Dental Association on native land, serving First Nations people. Dr. Kevin's major is passionate about promoting oral health to the public, as well as supporting First Nations throughout his career. Dr. Kevin enjoys playing basketball and practicing yoga, and is passionate about health and wellness. 


Silke is a Certified Level 1 Dental Assistant since 1981. Silke is a member of the O.D.A.A., with an extensive background in dental practice  management, specializing in office administration.  She regularly attends the Ontario Dental Association’s conferences , affiliate meetings and continuing education courses always striving for success.  She has a vast knowledge in all aspects of dentistry, and all issues related to insurance plans. She has been our office manager since 1998 and always makes you feel welcome!  She loves spending time with family and friends and also loves to travel.


Michelle is our freshest face at Quantum Health Dental. She is trained in Medical Office administration, and graduated in 2018. Michelle will greet you with a smile and a kind word, and is happy to assist our patients over the phone and in person. Michelle enjoys spending time with her daughter - doing puzzles and arts & crafts. Michelle is a dedicated Toronto Raptors fan, and her favourite music genres are hip-hop and reggae. 


Anna has been with our office since 2002. First as Level 11 dental assistant then she completed the dental hygiene program with Honors as a Registered Dental Hygienist  in 2008 and is the proud recipient of the Golden Scaler Award. Anna prides herself with being a caring and empathetic hygienist whose cheerful nature and gentle touch is a great comfort to her patients. With a background in teaching Anna is enthusiastic about educating her patients, especially kids about good oral hygiene.


Dana has been an energetic addition to the Quantum Health Dental team. Dana has completed Dental Hygiene certification 2000. Prior, Dana worked nearly 30 years in the dental field, having worked in general, periodontal, and pediatric dental offices. Dana focuses on providing her patients with the best possible care, whom appreciate her gentle hands and thoroughness. Dana enjoys spending time with her husband and two sons, and leading outdoor activities. Dana is fluent in both English and Hebrew.




Kirsi began her career as a preventative dental assistant in 1989. She continued her education and graduated with Honours as a Registered Dental Hygienist in 2007. She continues to educate herself regularly by attending conferences and continuing educational courses. It is vital to her that dental hygiene visits be fun, comfortable and educational. "I believe that a beautiful smile not only affects patients’ health, but self-confidence and overall well-being.”-Kirsi


Arezoo is a Certified Level 2 Dental assistant since 2014. Areezo will help you feel comfortable and relaxed while receiving treatment. She loves seing the smiles on patients' faces! In her spare time, Arezoo enjoys swimming, painting, and spending time with family. 


Natalia is a Certified Level 1 Dental Assistant since 2008. Natalia is a reliable assistant, always ready to help clean and organize. She has worked with Dr. Treger for the last 8 years, making patient's feel comfortable and at ease. Natalia enjoys reading, swimming, and playing piano.

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(905) 660-5129

398 Steeles Ave W #17-18, Thornhill, ON L4J 6X3, Canada

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