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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 Laser Endodontics.   

Endodontics is a microscopic science.  In our practice, diagnostic and therapeutic treatments are performed using the Dental Operating Microscope 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.

Laser technology has advanced almost every area of dentistry in recent years, and root canal therapy is no exception. The Waterlase iPlus laser is changing the way endodontists and dentists perform procedures. This technology uses air, water, and concentrated light instead of mechanical instruments to treat teeth.  This Waterlase technology helps with diagnosis, access preparation, surgery, canal cleaning, shaping and disinfection. The award-winning Waterlase system allows patients and dentists more gentle, simplified, and efficient dental care, so that you can spend a shorter, more relaxing time in the dental chair with less need for local or even general anesthesia.

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.

In our practice you can trust you are getting the most skilledstate-of-the-art care available. 

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, Paula, Mendy and Jessica are well known in the Texoma region, North Texas and Southern Oklahoma.  

Patient Testimonials

Who would have ever thought one could describe a visit to the endodontist as a wonderful experience?   I was terrified when I was told I needed a root canal, but pleasantly surprised with the process and outcome!  Thank you to Dr. Harris and his staff for being so gentle and never leaving my side.  I still can't believe I made it through the procedure without relying on N2O!  You and your staff are one in a million!  

Thank you!


I came in extremely stressed and nervous. I had heard so many horror stories of root canal procedures. Dr Harris did a fabulous job. Absolutely no pain during or after. I did not even have any discomfort that night or the following day. He and his staff were caring, thoughtful and efficient. Paula was excellent at what she did also. I would highly recommend him.                                                                                             


Was referred to Dr. Harris by my regular DDS.  THIS MAN IS AMAZING!  His staff are super friendly.  I enjoyed my appointment, he told me what his recommendation was to fix my problem and we will go from there.  I highly recommend this office!!!  10 stars! 

Christi Tynan

1117 Gallagher Dr.
Suite 430
Sherman, TX 75090