Mon: 8:00am-5:00pm
Tues: 8:00am-5:00pm
Wed: 8:00am-8:00pm
Thurs: 8:00am-5:00pm
Fri: 8:00am-3:00pm
Sat: 8:00am-2:00pm

About Us

Dr. Terry Ciomyk

Dr. Terry Ciomyk is a 1989 graduate of the University of Toronto, Faculty of Dentistry. He practiced in the Yonge-Eglinton area of Toronto for eight years prior to moving to Thornhill in 1996. He enjoys practicing close to beautiful historic Thornhill and is often seen taking lunch-time walks around the scenic neighbourhood.

Dr. Ciomyk is committed to professional development and excellence in all facets of dentistry. He has amassed over a thousand hours of continuing education throughout his career and has completed advanced post graduate training at the world-renowned Pankey Institute. He is a member of the Toronto Crown and Bridge Study Club, and has been a lifetime member of both the Ontario Dental Association and the Canadian Dental Association.

He enjoys sharing his knowledge with students who have an interest in Dentistry. He is a Co-operative teaching participant with the York Region District School Boards and has provided co-operative learning opportunities to graduates of Dental Assistant College.

Dr. Ciomyk enjoys spending time with his family and keeping up with his two energetic daughters and his dog Pickles.

Doctor Ciomyk is a member of the follow associations:

  • L.D Pankey Alumni Association
  • Canadian Dental Association
  • Ontario Dental Association
  • Royal College of Dental Surgeons of Ontario

Dr. David McDowell

Dr. David McDowell is a 1981 graduate of the University of Western Ontario Faculty of Dentistry. He practiced for 5 years in the Yonge-Finch area of Toronto, before moving to Thornhill in 1986. Dr. McDowell and his long time assistant Aileen Gallagher feel honoured to have served the Thornhill Community for over 30 years, and are excited to join the practice of Dr. Terry Ciomyk.

Dr. McDowell is a member of the Toronto Crown and Bridge Study Club, Ontario Dental Association, Canadian Dental Association. He enjoys continuing education in all facets of dentistry. He prides himself in caring, compassionate treatment for his patients.

Dr. McDowell is devoted to his wife and three children, 3 cats and a dog. He loves sports and music in his spare time.

Dr. Susie Ang

Dr. Susie Ang is a 1989 graduate of the University of Toronto, Faculty of Dentistry and a former classmate of Dr. Terry Ciomyk. She is excited to be joining Dr. Ciomyk’s practice after having worked in another dental practice in the Highways 7 & 404 area for the past 26 years.

Dr. Ang is a lifelong learner who is committed to professional development and devoted to achieving excellence in cosmetic and restorative dentistry. She has completed a postgraduate program in Esthetic Dentistry at the State University of New York at Buffalo, an advanced education course in the diagnosis and treatment of the masticatory system with Dr. Peter Dawson and courses in orthodontics, TMJ and sleep apnea at the world renowned Pankey Institute.

Dr. Ang is a fellow of the American Society of Dental Aesthetics and the International Academy of Dentofacial Aesthetics. She is a member of the American Academy of Craniofacial Pain, the Academy of General Dentistry, the Ontario Dental Association and the Toronto Crown and Bridge Study Club. Dr. Ang enjoys helping patients of all ages achieve exceptional dental health and the best possible smile. She takes a holistic approach to dental care and aims to provide treatments that are good for total wellness.

Dr. Ang loves to travel, and enjoys music, fitness and reading in her spare time. You can visit www.drsusieang.com for more information about Dr. Ang.


Our Staff Members


Tamee who has been with Dr. Ciomyk since 1999 and serves as the practice office manager, graduated from the Toronto School of Business in 1997 as a dental assistant. Her duties include scheduling, discussing dental treatments with patients, dealing with insurance companies, answering phones and assisting Dr Ciomyk. The best part of working at Dr. Ciomyk's office, according to Tamee, is meeting new people and ensuring that they have a pleasant experience. Tamee lives in Richmond Hill with her family. In her spare time, she enjoys watching her son Matthew play baseball ,walking her dog Toby and volunteering her time with a dog rescue that she cofounded. 



Dee joined Dr. Ciomyk's practice in 2001 shortly after graduating from the Toronto School of Business dental assistant program. Her duties include chairside assisting, taking x-rays, and inventory control. Her favourite part of dentistry is watching Dr. Ciomyk continuously change smiles. Dee lives in Scarborough with her family. She enjoys cooking, dancing and gardening.



Connie graduated from the dental hygiene program at Seneca College in 1989 and to this day, remains dedicated to the practice of dental hygiene. Connie joined Dr. Ciomyk's team in 2003 as the first dental hygienist and has been with the practice ever since. Connie enjoys working with an exceptional group of people. As a member of CDHO and ODHA, her goal is to help educate and improve patient's oral health. She is married and has 2 children and a dog named Heidi. She enjoys gardening, cycling, reading and relaxing at her cottage.



James joined Dr. Ciomyk's practice in 2003 as a part time dental hygienist. He is a graduate of the University of Toronto - Health Sciences and the George Brown Dental Hygiene Program. As a health care professional, he is committed to client focused care. He also has a wide knowledge base in health promotion through his work with the Region of Peel public health programs. James lives in Etobicoke with his wife and daughter. He enjoys catching a good movie, camping and traveling with friends and family.



Lori joined Dr. Ciomyk's practice in 2007 as the practice expanded. In 1997, Lori graduated from the Birmingham Dental Hospital as a dental hygienist. She is very friendly and tries to make everyone's dental visit a pleasant and relaxed experience. She is an ambitious dental hygienist who is always looking to enhance her knowledge and share it with others. Lori is a very busy mom of 2 boys Julian and Cristian.



Janice joined Dr. Ciomyk and Dr. McDowell's team in February, 2015 and has been working as Dr. McDowell’s office manager ever since. Janice's career began at the Canada Life Assurance Company in 1979 paying out dental claims. In 1980, she returned to school to study dental assisting at Career Canada. After 8 years of assisting, Janice switched to office manager/receptionist and since that time, has worked in many different dental offices. When not at the office, she enjoys spending her spare time at her trailer in Lindsay and travelling around the world. Janice lives in Markham with her dogs Bailey, Marlee and Buddy.



An joined the practice in 2015, having completed the Dental Assisting Program at George Brown College in 2014. An enjoys her work as a dental assistant and spends most of her time as a chairside assistant to Dr. McDowell. She lives in North York with her husband and her new rescue dog, Frida. She enjoys travelling and gardening in her spare time.