Find the source
of a lifetime of healthy growth

Compassionate care that addresses the true cause
of your discomfort so you can breathe easier, sleep
deeper, and live more fully.

Book a Consultation

We believe that healing starts within.


We’ve helped thousands of adults and children resolve TMJ, sleep, and airway issues by finding and treating the true source of dysfunction.

Root Cause Dental Group
Sleep & Airway Issues

Our alternatives to CPAP treat the source of sleep apnea - so you breathe better and sleep deeper.

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Root Cause Dental Group
Airway Orthodontics

We guide jaw and airway development early to support a lifetime of healthy breathing and growth.

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Root Cause Dental Group
TMJ & Jaw Pain

Treat the joints and muscles behind jaw pain, headaches, and limited movement to ease your discomfort.

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Our Approach

Diagnose

We connect your symptoms to their true mechanical source before recommending any treatment.

Innovate

We design and produce many appliances in-house using cutting-edge technology for a faster, more precise fit.

Comfort

Our office is a quiet, respectful environment where you'll feel seen, supported, and safe throughout your care.

Collaborate

We partner with physicians, ENTs, physiotherapists, chiropractors, and massage therapists whenever it helps your outcomes.

Empower

We build flexible, transparent plans around your life so you always know what we're doing, why, and what success looks like.

Holistic

We assess joints, muscles, bite, tongue posture, airway, and sleep together, because relief requires understanding the full picture.

You are not broken.
Your pain is real, and it has a source.
Let’s find it, together.

Get in Touch

Meet the Team Behind Your Care

From treatment coordinators to orthodontic assistants, every member of our staff is here
to make your experience feel supported, informed, and at ease.

Root Cause Dental Group - Dr Sepehr Jafarpour

Dr. Sepehr Jafarpour

Dr. Sep is passionate about helping patients find the source of their TMJ, sleep, and airway issues. His approach always begins with "why." He takes time to understand each patient's unique situation, goals, and concerns before building a plan that fits. Dr. Sep believes that great results come from collaboration, and he empowers his patients to take an active part in their treatment planning and long-term care.

Before pursuing dentistry, Dr. Sep earned a Master of Science in Biostatistics from the University of Toronto, followed by his Doctor of Dental Surgery (DDS) degree from the University of Detroit Mercy School of Dentistry. During his studies, he received the American Academy of Oral and Maxillofacial Pathology Award and was recognized for his dedication to academic excellence.

Outside the clinic, Dr. Sep loves outdoor sports and adventures, traveling, and spending time with his family and friends.

Root Cause Dental Group - Dr Lisa Popp

Dr. Lisa Popp

Over her 30-year career, Dr. Lisa has been committed to continuous growth, fueling her passion for practicing ROOT CAUSE dentistry. A deep dissatisfaction with merely treating the symptoms of disease and a desire to help her patients in a more meaningful way led her to join the Root Cause Dental Group, where she focuses on addressing the underlying causes of airway, sleep and TMJ disorders.

Originally from Dorchester, Ontario, Dr. Lisa now lives in London with her husband and three children. She earned a BSc Honours Genetics (1993) and a Doctor of Dental Surgery degree (1997) from the University of Western Ontario, where she received several awards and scholarships. Continuing education and certifications in nutrition, functional medicine, functional genomics, and airway dentistry shape her holistic approach.

Outside the office, Dr. Lisa enjoys reading, travelling, and spending time with her family.

Root Cause Dental Group - Amanda
Amanda

Orthodontic TMJ Sleep Assistant

Root Cause Dental Group - Jody
Jody

Treatment Coordinator

Root Cause Dental Group - Kaitlyn
Kaitlyn

Orthodontic TMJ Assistant

Root Cause Dental Group - Mary
Mary

Orthodontic TMJ Sleep Assistant

Root Cause Dental Group - Olga
Olga

Administrative Receptionist

Root Cause Dental Group - Sherry
Sherry

Orthodontic TMJ Sleep Assistant

Visit Us

Our compassionate team is here to help you feel at ease while providing care that supports long-term health and balance. Book your visit today and take the first step toward lasting relief.

Our Email

info@rootcausedentalgroup.com

E-mail Us

Our Phone

(519) 455-4110

Call Us

Our Office

1295 Highbury Ave, C8 London, ON N5Y 5L3

Visit Us
Request an
appointment today!
Root Cause Dental Group
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Office Hours
  • Monday: 08:00am - 5:00pm
  • Tuesday: 08:00am - 5:00pm
  • Wednesday: 08:00am - 5:00pm
  • Thursday: 08:00am - 4:00pm
  • Friday: Closed
  • Saturday: Closed
  • Sunday: Closed


We recognize that our clinic today is located on the traditional lands of the Haudenosaunee,
Anishinabek, Attiwonderonk and Mississauga peoples.

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