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Dear Valued Patients,

We are aware that Governor Abbot has lifted the public mask mandate for the state of Texas.However, for the safety of our employees and patients, we will still be following the current CDC guidelines and continuing our current COVID-19 protocol.

Our decision to follow the current CDC guidelines along with those of our professional organization, the ADA, was made in an effort to continue our goal to keep our patients and team members safe and healthy.  Those guidelines and criteria include but are not limited to:%u200B

  • The door to our reception area will remain locked during business hours.
  • Please call our office to check-in, 903.868.0200.
  • Everyone entering our office must wear a mask at all times.
  • All patients and their escorts will be asked COVID related questions, if any answers are affirmative, they will be asked to defer any non-emergency procedures.
  • All staff, doctors, patients and their escorts will have their temperature checked upon arrival and if it is greater than 100.4 they will be asked to see their medical doctor, rescheduling with us once they are medically clear.
  • When possible, patients will be asked to attend appointments alone.  When an escort is needed (mobility issues, minor, etc.) the escort will be asked to wait in their vehicle or in our foyer/hallway which has chairs.
  • Recommendations for PPE will be complied with.
  • For the foreseeable future we will be staggering patient visits in order to reduce patient to patient interaction.  This necessitates significant scheduling changes so please be patient with us.

We will follow the CDC guidelines until our employees, who wish to be vaccinated, can complete the vaccination protocol.

We will re-evaluate our office policies as vaccines become more widely available.
Thank you for your cooperation and for helping us all stay healthy!


Gary Z Harris, DDS

Our Mission is simple: to provide you with the finest endodontic treatment available anywhere.

We strive for clinical, administrative, and technological excellence in every facet of our practice. It comes from years of experience in the profession and through the use of the latest advances in endodontic technology. We take great pride in being a state of the art endodontic practice and are committed to caring for you, our patients, as we would our own family. 

Practice Profile

Dr. Harris proudly offers quality dentistry specializing in Microscopic Conventional and Surgical Endodontics.   

Endodontics is a microscopic science.  In our practice, diagnostic and therapeutic treatments are performed using the Dental Operating Microsope to provide superior visualization inside the tooth.  This technology increases our ability to provide more complete and conservative dental treatment.   At magnifications of more than 20x and with optimal lighting, we are better able to see extra canal systems, unique anatomical complexities, and to identify fractures.

Our office utilizes advanced digital imaging which reduces radiation exposure during dental x-rays.  Because these images are digitized, the Endodontist uses computer software to amplify and manipulate images for better diagnostic purposes. We are also very proud to be utilizing 3-D volumetric imaging, also known as Cone Beam Computed Tomography (CBCT).  This new technology allows complete 3D visualization of the teeth and supporting structures with ultra low radiation exposure. This breakthrough technology provides unprecedented radiographic views of the teeth and supporting structures. When appropriate, this technology can be an indispensable tool for proper diagnosis and treatment planning. This device also minimizes radiation exposure by having a very small area of focus to allow detailed visualization of the area of interest, without unnecessary exposure to surrounding tissues.

Dr. Gary Z Harris has practiced Endodontics in Sherman since 2001.  Before moving to Sherman, he practiced Endodontics in Plano for over 20 years.  Dr. Harris graduated from Baylor College of Dentistry in 1979 and received his Certificate in Endodontics from LSU School of Dentistry in 1981. He has been involved in local and international organized dentistry and endodontics throughout his career.  

Dr. Harris and his team, Jackie, Naomi, Larissa, Brandi, and Diana are well known in the Texoma region,  North Texas and Southern Oklahoma.  

What Our Patients Say...

Thank you all for helping. What a great office and staff.  I have been to a lot of dentist’s office in my life but this has been one of the best experiences so far.  

Thank you,

Travis Graham  


My recent visit and root canal treatment with Dr. Harris and his staff was a very pleasant experience.
The staff is efficient and friendly, handling all the details in a professional and considerate manner.
The care and concern from Dr. Harris and the assistants was clearly demonstrated as the procedure and treatment was completed.
I will certainly recommend Dr. Harris practice to others needing dental care and treatment.
Gerald Owens

Dr. Harris is wonderful! He solved my problem and my tooth pain is gone! He’s a wonderful Endodontist  and I would highly recommend him.
He has a wonderful bedside manner as well. There is no need for you to look anywhere else!
I’m sorry I cannot post this on Facebook or Google as I do not have accounts.
Jill Saltz

1117 Gallagher Dr.
Suite 430
Sherman, TX 75090