Periodontics & Dental Implants


3400-A Old Milton Parkway,
Suite 460
Alpharetta, GA 30005

Welcome to

John C. Harrell, D.M.D.

Alpharetta Periodontics & Dental Implants

Dr. Harrell and his staff specialize in treating periodontal diseases (a persistent infection in the soft tissues of your mouth). Using non-surgical, surgical,and regenerative techniques, we can help treat the underlying causes of your disease. We strive to restore your periodontal health in the most non-invasive and cost-effective way possible.

Dental Implants

Don’t let a broken tooth mean a broken smile.  Dr. Harrell can fix your tooth with a dental implant.  We insert a titanium post into the area where the tooth is missing.  This later can be restored with a crown by your dentist.

Deep Cleaning

Gum disease is a serious issue that affects more than sixty-four million people in the United States. It can be treated with deep cleaning, which removes build-up such as bacteria, calculus and debris that is present under the gums.


Periodontal diseases are painless until their advanced stages. If left untreated, periodontal diseases can result in bad breath, red, swollen, bleeding gums and eventually tooth loss.

Our Practice

Dr. Harrell offers a friendly environment where patients can put their fears of visiting the dentist aside. We know that your time is important and we work to ensure that your visit happens as professionally and quickly as possible.

Personal and Professional

Dr. Harrell utilizes the latest technology and the practice is operated with our patients in mind. We embrace innovation and always look for ways to better treat our patients.

Implant Specialists

Dr. Harrell is an implant specialist with extensive training and experience. Our tooth replacement system uses quality materials supported by a high level of clinical expertise.

Hours of Operation

Our office is open Monday, Tuesday, Thursday from 7am – 4pm and Friday, 7am – 2pm. We are closed on Wednesday.

Meet Our Staff

With Dr. Harrell and his experienced staff, you’ll always get the one-on-one attention you need, and you’ll never be rushed.

Dr. John Harrell, D.M.D.

Dr. John Harrell, D.M.D.


1992 graduate of the Medical College of Georgia School of Dentistry, Dr. Harrell also completed his Periodontics residency at the Medical College of Georgia in 1994.

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Carla Quinn

Carla Quinn

Marketing & Office Manager

Carla has worked in the dental field since 1990 and she is a graduate of the University of North Georgia. Carla began working for Dr. Harrell in 2012.

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Lauri Owens

Lauri Owens


Lauri grew up in Southern California, and moved to Georgia in 1991. She attended Hygiene school and graduated in 1995. She has
been practicing in the Atlanta area in 1995.

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Lindy Robertson

Lindy Robertson


Lindy has been in the dental field practicing dental hygiene since 1999 and loves to help people take care of their teeth.. She has worked for Dr. Harrell since 2006.

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Michele Wardell

Michele Wardell

Surgical Assistant

Michele grew up in the Atlanta area and has been in the dental industry since 1994. Michele looks after our patients and she loves helping people improve their smiles.

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Nikki Scott

Nikki Scott


Nikki has a passion for helping people understand that dental health is crucial to maintaining your overall health. Nikki has been
with Dr. Harrell since 1997.

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Do you offer general anesthesia?

No, only local anesthetic.

Do I need to arrive early for my first appointment?

Yes. Please arrive 10 minutes early.

Where should I park?

Parking is free and located directly behind the Northside/Alpharetta Medical Buildings.

Do I have to pay my entire balance on first visit?

Dr. Harrell is fee for service and we are happy to file your insurance and have payment sent to you.

Do you offer financing?

We recommend and accept Care Credit. Ask us for more information.

Do you offer cosmetic dentistry?


What is gum disease?

Gum disease is an infection of the tissues that hold the teeth in place. Typically caused by poor oral care.

What do I need to bring to my first appointment?

Proof of identification and insurance information.



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