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A team dedicated to the well-being of patients

Our team is made up of dentistry and oral health professionals who share a desire to improve the smile and well-being of their patients.

Dr François Lechner

Dr. François Lechner

Dr. Lechner is the founder of PRISMA DENTISTES and has worked in the field of dentistry for over 30 years. Mastering all aspects of general dentistry, Dr. Lechner developed an interest in sleep disorders and in neuromuscular dentistry. He has a distinct vision of his profession through his research on the links between the temporomandibular joints, occlusion and posture, which he shares with the professionals working alongside him. He is a graduate of l’Université de Montréal, and continuously learns by taking courses and attending conferences all over the world. Dr. Lechner is involved in various associations, such as the Ordre des dentistes du Québec, Association des chirurgiens dentistes du Québec, American Academy for Sports Dentistry and American Academy of Dental Sleep Medicine.

Dr Steven Krychman, parodontiste

Dr. Steven Krychman, Periodontist

A seasoned periodontist, Dr. Steven Krychman has more than 20 years of experience in dentistry. Holder of a DDS (Doctorate in Dental Surgery) from McGill University and a certificate in Periodontology from Tufts University in Boston, he is a member of the Association des parodontistes du Québec, Canadian Academy of Periodontists and American Academy of Periodontology. Always keen to keep his knowledge current, Dr. Krychman stays abreast of new developments that could improve his practice. He is empathetic and caring, and this noble-hearted man is involved in many ways in the Montreal Association for the Blind and the Mackay Center. When he is away from his patients, he can be found on a golf course where he plays with surgical precision.

Dre Hélène Buithieu, pédodontiste

Dr. Hélène Buithieu, Pedodentist

Dr. Buithieu is a Fellow of the Royal College of Dentists of Canada and has more than 20 years of experience in paediatric dentistry. She holds a Master’s degree in dental sciences, a certificate in paediatric dentistry and has taken several continuing education courses. She serves as an Associate Professor at the Faculty of Dental Medicine at the Université de Montréal, and is a proponent of pain-free dentistry. She leverages her knowledge, tact and warmth to educate children about dental health without preaching, a gentle approach that is appreciated by the young and old alike. This mother of three also loves tennis, running, cycling, telemarking and skiing.

Dre Lisa Sapatis

Dr. Lisa Sapatis

Dr. Lisa Sapatis obtained her dental degree from McGill University in 1999, and completed a multidisciplinary dental residency program at the Royal Victoria Hospital.

She has been a member of the team at Prisma Dentists since 2015.

She received extensive continuing dental education at the renowned Dawson Academy and with Spear Education, where she developed expertise in occlusion, management of TMJ disorders, cosmetic and restorative dentistry, and implant restorative dentistry. She received training at the C.L.E.A.R Institute and with Align Technology, and offers minor orthodontic treatment with Invisalign aligners. She has also received advanced training and certification at in the management of sleep apnea with oral advancement appliances.

Dr. Sapatis is a member of the Order of Dentists of Quebec, the Canadian Dental Association, the Montreal Dental Club, the Spear Study Club, the International Team for Implantology (ITI), and the American Academy of Dental Sleep Medicine.

“I am committed to providing patients with high quality, comprehensive and personalized dental care.  I value my patients, and take time to listen and educate them about different treatment options, in order to accomplish aesthetic and functional goals through careful planning and execution.”

Peter Ortez – Responsable du département sommeil et Invisalign

Peter Ortez – Manager of the sleep and Invisalign department

Peter has several years of experience in administration and excels in his position as Manager of the sleep and Invisalign department. Trilingual in English, French and Spanish, he has unparalleled communications skills. He plays a pivotal role in our internal and external operations in dental healthcare. Peter works closely with our partners and suppliers to ensure the utmost quality for our clientele. Patients of all ages appreciate his warm, empathetic approach.

In his spare time, Peter likes to spend time with his family and volunteer with people who are in need. He is a disciplined athlete and is passionate about archaeology and science fiction.

A personalized approach

Our team fosters a global approach to your oral health. We listen to your needs and offer you professional services in dental health and dental aesthetics for a lifetime of smiles.