Welcome to
Johnston Orthodontics

For the past 25 years Johnston Orthodontics has strived to provide the highest quality of orthodontic care to our patients in and around the Marietta and Sandy Springs area’s. Dr. Mark Johnston knows what a significant difference in health and self-esteem a beautiful smile can make, which is why Johnston Orthodontics is dedicated to giving each of our patients the beautiful smile they deserve!
Meet The Doctor

Meet The Doctor

Dr. Johnston is pleased to welcome you and your family to his practice. With a strong commitment to orthodontics, and a never-ending dedication to his patients, Dr. Johnston works profusively to provide each of his patients with the information, treatments, and care they deserve.

Meet The Doctor

From Braces to Clear Aligners

From Braces to Clear Aligners

Dr. Johnston and his team offer all sorts of treatments for every case. From traditional braces to alternatives like Invisalign, you can rest assured you are getting exactly the kind of treatment you need.

From Braces to Clear Aligners

First Visit

First Visit

Ready to get started on your treatment? There's just a few housekeeping items to get squared away before we begin.

First Visit

Some Testimonials From Our Patients!

Thank you so much for making my teeth look perfect! - ♥ Emily B. age 15
I have been waiting for this moment since 5th grade. Thank you! And I love the cowbell! - Nick C. age 16
Thanks for making my teeth look so great before I turned 50! - Sherry G. age 49
Thanks so much for my new smile. It’s a great way to start high school. - Brexton P. age 14
You and your staff have been so friendly and sweet to me over the years. I have grown to love you guys. Thank you so much for my beautiful smile. - Lisa J. age 32
Thank you for fixing my overbite! Now I’m not embarrassed to take pictures. - Grace N. age 14