All our professionals at Johnstone Periodontics maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in periodontics.

Dr. Andrea Johnstone

BSc(Hons), DDS, MSc(Perio), FRCD(C)



Dr. Andrea Johnstone is a board certified periodontist who provides comprehensive periodontal care to patients including implant surgical procedures. Dr. Johnstone has a special interest in soft tissue grafting for teeth and implants and regenerative surgery. Dr. Johnstone completed her undergraduate degree in Biomedical Science from the University of Guelph. She then received her doctor of dental surgery degree from the University of Western Ontario. Dr Johnstone then completed a residency program at Mount Sinai Hospital in Toronto. Dr. Johnstone then received her Masters of Science (Periodontology) at the University of Toronto. Dr. Johnstone is a fellow of the Royal College of Dentists of Canada.  Dr Johnstone is a staff Clinician at the Centre for Advanced Dental Research at Mount Sinai Hospital in Toronto completing clinical research in advanced cases of periodontal disease, gingival recession and developing new techniques for papilla regeneration.   Dr Johnstone is also the Past President of the Toronto Central Dental Society, and Past President of the Ontario Society of Periodontists.  Dr Johnstone also enjoys cooking and golf and is a mother to twin boys!


Dr. Monica Raina

BSc(Hons), DDS, MSc(Perio), FRCD(C), Diplomate, American Board of Periodontology



Dr. Monica Raina is a dually board-certified periodontist in Canada and the United States, trained in all aspects of gum surgery and implant dentistry. Her practice scope includes comprehensive periodontal and implant surgery, with a passion for soft tissue grafting, aesthetic gingival procedures and bone augmentation procedures for implant-site development. She completed her dental degree at Western University and then entered into a 1-year hospital internship at the University of Rochester, Eastman Institute of Oral Health, enriching her training in complex surgical cases and medically compromised patients. She then completed her periodontal speciality training at the University of Iowa, receiving her Diploma in Periodontics and Implant Surgery and a Masters of Science in Oral Sciences. She is both a Fellow of the Royal College of Dentists of Canada, and a Diplomate of the American Board of Periodontology. She has won multiple awards and has published in peer-reviewed scientific journals.

Dr. Raina has been teaching at the University of Toronto Faculty of Dentistry since 2014 and enjoys helping shape the minds of future dentists. She is a member of the American Academy of Periodontology, the Ontario Dental Association, the Midwest Society of Periodontology, the American Board of Periodontology and sits on the executive committee of the Ontario Society of Periodontology and the Toronto Central Dental Society. Dr. Raina enjoys cooking, salsa dancing and spending time with friends and family in her spare time.                                                                      


Dr. Alia El-Mowafy BDS,

Msc(Dental Anaesthesia), Dip ADBA

Clinical Instructor, Faculty of Dentistry, University of Toronto


Alia El-Mowafy attended the Bachelor of Science programme at York University majoring in Psychology and Kinesiology. She went on to complete her degree in Dentistry at Future University in Egypt. She then attended a general practitioner residency at the same university. It was there that she discovered her interest in anaesthesia, and she decided to enter the Dental Anaesthesia program at the University of Toronto where she completed her masters degree. Alia is a practicing dental anaesthesiologist and the founder of Dental Anaesthesia Services, a mobile anaesthesia company that provides anaesthesia services to dental offices in the southern Ontario region. She also teaches at the Faculty of Dentistry, University of Toronto to both undergraduate dental students and graduate residents in the Dental Anaesthesia and Periodontology programs. In her spare time, she loves to cook and travel.



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