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Dr. Johnston

Meet our Doctor

Dr. Mark Johnston was born in Vestavia Hills, Alabama, and moved to the Dunwoody area in middle school. He graduated from Dunwoody High School and from the University of Georgia (UGA), where he received a Bachelor of Science degree in Biology. At UGA, he was involved in many activities, including the Phi Gamma Delta fraternity and Student Judiciary. He entered the Medical College of Georgia in Augusta, and received his Doctorate in Dental Medicine (D.M.D.) degree. After dental school, Dr. Johnston continued his education at the University of Alabama at Birmingham (UAB). He completed a Hospital Dentistry Residency where he received a certificate in Hospital/General Practice Dentistry. Dr. Johnston was a Research Assistant for the Department of Oral and Maxillofacial Surgery; during the same year, he was a Clinical Instructor for the UAB Department of Restorative Dentistry. He completed his three-year orthodontic residency program and received his Master of Science degree and his Certificate in Orthodontics from the UAB School of Dentistry.

Dr. Johnston returned to Atlanta and opened his orthodontic practice in Marietta.  In 2001, Dr. Johnston earned his Board Certification from the American Board of Orthodontics. In order to receive this certification, an orthodontist must complete an intensive case presentation and examination. Only 25% of the orthodontists in the United States are Board Certified.

Dr. Johnston is committed to furthering the future of Orthodontics with his involvement in several dental councils and organizations (listed below). He is a Past President of the Georgia Association of Orthodontists (1999), and the Southern Association of Orthodontists (2008), representing the eleven southern states.  He is also a member of the Midwest Component of the Angle Society.

Dr. Johnston is very active in his local community. He has been a Partner in Education for Sope Creek Elementary School, Dodgen Middle School and Dickerson Middle School. Other areas of his involvement include:

Dental mission trips with churches to Peru, Mexico and Honduras.

Eagles Nest- an Atlanta inner-city mission for the homeless.

Rainbows- an international organization designed to assist children and adults who have experienced loss of a loved one from death or divorce.

Rotary Club of East Cobb

Citizens Advisory Committee for surround public schools.

Baseball coach.

Dr. Johnston enjoys many hobbies, including hunting, fishing, jogging, boating and enjoying the North Georgia Mountains with his family.

Dr. Johnston resides in Atlanta with his wife, Helene.  They have three daughters, Taylor, Chandler and Bailey and one son, Watts.  They have two dogs, Pearl and Greta; and two cats, Gary and Lila, two granddogs and one grandcat!

Thanks so much for my new smile. It’s a great way to start high school.

Brexton P. age 14

Thanks for making my teeth look so great before I turned 50!

Sherry G. age 49

Thank you for fixing my overbite! Now I’m not embarrassed to take pictures.

Grace N. age 14

I have been waiting for this moment since 5th grade. Thank you! And I love the cowbell!

Nick C. age 16

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 so much for making my teeth look perfect!

♥ Emily B. age 15