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About Us


Dr. Rita Kilislian

Dr. Kilislian received her DMD from Tufts University School of Dental Medicine located in Boston, MA, in 1995. Two years later, she completed a specialist degree in endodontics. In 1997, Dr. Kilislian joined a large group of specialists in endodontics located in Toronto’s financial district as well as Yorkville.

Dr. Kilislian's belief is that all patients have a right to specialized endodontic treatment regardless of their financial situation. She treats all patients, including government assistance patients, patients with disabilities, and patients requiring various forms of sedation. She is the clinical director of the practice and has multiple associates in her practices. Dr. Kilislian is available 24 hours a day to answer any patient concerns or dental emergency.

Dr. Kilislian lectures on advances in endodontic surgery to various members of the dental community and does accept referrals from other endodontists. Patients are free to self-refer in the event they feel they may benefit from endodontic treatment or an endodontic consultation.

Dr. Kilislian's main interests are in research related to saving the otherwise unsalvageable tooth.

Dr. Kilislian is the past president of the Toronto Central Dental Society and a member of the following organizations:

  • Canadian Dental Association
  • Ontario Society of Endodontists
  • American Association of Endodontists
  • Ontario Dental Association
  • Peterborough and District Dental Society
  • Peterborough Chamber of Commerce
  • Royal College of Dental Surgeons of Ontario
  • Canadian Academy of Endodontists

Dr. Aaron Fox

Dr. Aaron Fox graduated from the University of Toronto in 2006, where he completed his DDS. Dr Fox practiced as a general dentist for 9 years, prior to returning to the University of Toronto in 2015, where he completed his Masters in Endodontics in 2018. Over the course of his 9 years in general practice, Dr Fox developed breadth in his general dental knowledge and skills, and eventually realized his passion for clinical Endodontics. Dr Fox maintained clinical practice in many communities across Ontario.

Dr. Fox and his wife enjoy spending time with their two daughters, as well as travelling, and many outdoor activities, such as skiiing.


Dr. Harry Singh

Dr. Singh grew up in Whitby, Ontario. After attending the University of Toronto and earning a degree in chemistry, he moved to Cleveland, Ohio to attend Dental School at Case Western Reserve University. Upon graduation in 1995, he completed a General Practice Residency at St.Luke’s Hospital in Cleveland, and then worked in private practice for a few years. In the summer of 1998, Dr. Singh married his wife, and they moved to Milwaukee, Wisconsin, where he began the two year Endodontic Specialty Program at Marquette University, graduating from this program in 2000.

Dr. Singh practiced as an Endodontist for 3 years in Concord, NH and then relocated and established his own practice in Rochester, NY in 2004 in order to be closer to family in the Greater Toronto Area. He and his wife have 2 boys and currently reside in Pittsford, NY. Dr. Singh enjoys painting, exercising and all genres of music. He is a current member of the American Dental Association, the American Endodontic Association, the Canadian Dental Association and the Ontario Dental Association.


Dr. Arij Al Kayyali

Dr. Kayyali is a Certified Specialist in Endodontics. She graduated in 2001 from Jordan University of Science and Technology in Jordan. Dr. Al Kayyali decided to pursue her passion and obtained a master’s degree in Endodontics from Jordan University of Science and Technology in 2007. She spent the next six years working in the United Arab Emirates. In 2014 she moved to Canada and completed the equivalency exams of Canada for general dentistry. In 2018, she was a part-time clinical instructor at Faculty of Dentistry at U of T. In 2019, she successfully finished her Dental Specialty Assessment and Training Program at University of Toronto. Currently, she is a fellow of Royal College of Dentists of Canada and a licensed Endodontist in Ontario.


Sarah – VP of Operations

Sarah Barradas is a graduate of Queen’s University (double major Life Sciences and Physical Education). Sarah worked as a consultant for dental equipment and practice software companies before joining Willowdale Dental Group.

Sarah is also a registered restorative dental hygienist. In her role as treatment coordinator she provides information and assistance to patients making decisions about complex treatment plans. She is also a co-education director of the non-profit Dr. Kilislian School for Excellence in Dental Continuing Education.

As a teenager, Sarah was a captain of a national woman’s soccer team and represented Canada in the Pan American games. A true team player, Sarah has an open door management philosophy and is keen on helping patients get the best dental outcomes.

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