"People Love Us On Google"30+ Google reviews
New Patients Are Welcome!     ONLINE SCHEDULING


Lake Saint Louis orthodontist Dr. Lisa Seim provides safe, effective and unique orthodontic care to each patient she treats. Unlock your perfect smile today!


At Seim Orthodontics, Lake St. Louis orthodontist Dr. Lisa Seim provides her patients with comfortable and advanced care that leaves them feeling like a part of our family. When you visit us, we always strive to put your needs first.

Because Dr. Seim is the only orthodontist at Seim Orthodontics, you’ll have the unique opportunity to receive the same quality care every time you visit us. Dr. Seim takes the time to get to know her patients and their goals, resulting in absolutely stunning smiles.


Listen To What Our Patients Have To Say!

Our Patients Are Our Biggest Fans!

"We highly recommend Seim Orthodontics! Everyone is very kind and welcoming. Dr. Seim also takes a more conservative approach to dental correction, which is greatly appreciated!"

- Steven Carter

Our Services

A beautiful smile helps you feel happy and confident. Everyone has individual orthodontic goals and needs, so we offer several treatment options to choose from.

Traditional Braces

Clear Ceramic Braces


Dr. Lisa Seim


Dr. Lisa Seim was born and raised in the St. Charles area and is honored to serve her hometown. She became interested in orthodontics when she had braces as a teen. As an orthodontist, she loves getting to know her patients and watching them gain confidence, just like she did.

Dr. Seim attended St. Louis University, where she received degrees in Nutrition & Dietetics and Biology. She received her Doctorate of Dental Surgery (D.D.S.) from the University of Missouri–Kansas City School of Dentistry. She graduated at the top of her dental school class with Magna Cum Laude recognition. Dr. Seim earned her Orthodontic Certificate and Master of Science in Dentistry (M.S.) at St. Louis University Center for Advanced Dental Education.


What Our Patients Say About Us

People From Everywhere Love Us!

Treatment For All Ages

Dr. Seim is happy to work with patients of all ages. Whether you are looking for an orthodontist for your family or for yourself, our office will make you feel right at home. We will work closely with you to create a personalized treatment plan that works with your lifestyle and your budget. We offer a variety of esthetic options, including clear ceramic braces and Invisalign. As a mom herself, Dr. Seim knows there’s nothing more important than making sure your child receives honest, effective care.

Discover the Seim Orthodontics Difference

Dr. Seim would love the opportunity to meet you and your family while helping you achieve the smile of your dreams. At Seim Orthodontics, we put our patients first, and we’re proud to offer amenities including same-day treatment, payment plans, 0% financing, and emergency care if you need it.

Become a part of our family and experience warm, welcoming care like never before. Schedule your appointment with our orthodontist Lake St. Louis by contacting us today!

Can I Floss With Braces?

Families and children welcome at Seim Orthodontics. Visit our orthodontist Lake St. Louis today! Payment plans and 0% financing available. Call (636) 265-1995 !

Learn More

Will Clear Braces Stain?

Families and children welcome at Seim Orthodontics. Visit our orthodontist Lake St. Louis today! Payment plans and 0% financing available. Call (636) 265-1995 !

Learn More


Please use this form for general information purposes only. DO NOT send personal health information through this form. Specific patient care must be addressed during your appointment.

ATTN VENDORS: We do not entertain solicitations through this form.