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Our doctors have been working together for more than 31 years, providing patients in upper Montgomery County optimal dental healthcare and wellness for a lifetime. Our incredible results are inspiring! Check out some of our patients' before and after photos to see their journey to a new smile.

Dr. Dennis Stiles and Dr. Marie Tigani Stiles have been providing comprehensive dental care to patients in Gaithersburg, the Kentlands, and Montgomery County for more than 34 years.The doctors and team at Stiles Dentistry take great pride in working with each of our Gaithersburg dental patients to diagnose, treat, and educate patients on maintaining good oral health.
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Since 1986, Stiles Dentistry has upheld the mission of delivering extraordinary care and service and offering individualized attention with detailed accuracy. Drs. Dennis J. Stiles and Marie Tigani Stiles have been working together for more than 31 years, to provide patients in upper Montgomery County with optimal dental healthcare and wellness for a lifetime.
We recognize that all our patients are unique and deserve to receive dental care that reflects their individual needs. Our experienced and talented dental team is committed to working with you and your family to create a comfortable, stress-free, and rewarding dental experience every time you visit our practice.
Dr. Dennis Stiles, a native of Amherst, Massachusetts, has called upper Montgomery County home since 1986. In 2017, he achieved Diplomate status in the American Board of Dental Sleep Medicine. Dr. Stiles has also served as past president of the American Prosthodontic Society (2006) and currently is serving the president of the APS Foundation.
We would like to invite all new patients to experience a thorough evaluation. You are a new patient only once, and we want to ensure you have the most optimal visit with us. Your evaluation visit will include the completion of your in-office online patient forms, an examination of each tooth, a review of your medical and dental histories, a gum evaluation, an oral cancer screening, a TMJ and bite analysis, and a smile assessment.
Reviews (10)
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Doug
Jun 05, 2022
As is always the case, my experience at Stiles Dentistry always has been and, I am most sure and without doubt, will continue in a manner that cannot be exceeded. I still credit Dr. Stiles and the entire office with getting me to go back to the dentist after years of not going based upon prior bad experiences. There aren't enough existing superlatives that I would extend. I always refer everyone I know to Stiles Dentistry.and always will. Thank you All!
Will Clark
Jun 05, 2022
Stiles Dentistry is great practice with the latest technology. Also the latest Covid safety procedures in place for both patients and providers. Best cleaning I ever had! Their restoration work is top notch also. I would suggest Stiles Dentistry to anyone looking for talented, expert care delivered with a personable touch. That is why I keep returning to this practice.
Kevin Heller
Apr 23, 2022
I've been going to Stiles Dentistry for almost 10 years now. During that time, the staff has always been friendly, informative, and courteous. They are more than willing to answer all my questions and work with me to find the right time to get dental work done. Whenever there has been an unexpected dental issue, they've been able to see me on short notice.

The facilities are clean and all the equipment is state-of-the-art. From cleanings, to fillings, to getting a crown, Stiles Dentistry has performed superb work to keep my mouth in tip-top shape! I can't recommend them enough!
Steve Maas
Apr 21, 2022
My appointment was right on time. The clinician treated me as an individual, performed a thorough check and cleaning, and explained exactly what she was doing. No pain.
Jeanne Gillis
Apr 15, 2022
I had my regular checkup today. Everything went well; it was very organized with safety a priority. Eva is professional, thorough and happy to answer questions. Dr. Dennis has been taking care of my teeth for years, and it's been a family affair with both my mother and sister as patients.
Mike Motemaden
Apr 09, 2022
I have been a patient of Stiles dentistry office for over 25 years now. This husband and wife team has been at the top of their profession for all these years that I have been going to them. I know staying on the top requires new equipment, training to use new technology in the dentistry business, and good assistants to enable them to provide the best service for the money. I recommend the Stiles team to everyone because I believe the best investment in your health is to have good teeth to enjoy food and look good. Michael M.
Vlado Knezevic
Feb 28, 2022
I got in with acute pain within matter of hours. It was busy day in the office so fitting me in was not a small task! Superb service. Patient focused options. Superb technology. Safe. very safe. environment! Just what I am used on every time I go! Highly recommend as dental provider.
Heven Abraha
Nov 28, 2021
Excellent service! I had a filling today and Dr. Stiles did a wonderful job. Dr. Stiles listened to my concerns and addressed any issues I had. Morgan, the wonderful dental assistant made sure I was ready for Dr. Stiles and made sure I was completely comfortable. I have always had a fear of injections but since Stiles Dentistry is a sedation practice, they utilized tools that made my experience as painless as possible.

The staff was welcoming and friendly and they all ensured my visit went smoothly and stress free. If you are looking for a new dental office, look no further than Stiles Dentistry you will truly have a one of a kind experience. Thanks again Dr. Stiles and your wonderful staff!
Beth Price
May 11, 2021
I have been a patient of Dr. Dennis Stiles and his phenomenal team for the past two years. I am 74 years old and have been treated by many dentists throughout my lifetime in PA, NY and MD. Dr. Dennis Stiles is the absolute best! Dr. Stiles is meticulous, a perfectionist, gentle, and personable. He utilizes state of the art equipment and procedures. Dr. Stiles is also a faculty member at the University of Maryland Dental School.

As a retired nurse clinician and educator, I am fully aware that teaching students and new graduates keeps you constantly on your toes. I highly recommend Dr. Dennis Stiles and his entire team.
David H. Miller
Apr 01, 2021
Stiles Dentistry has always offered quality dentistry, I've been a customer for many years. Today, in my visit I saw the steps they have taken to maximize safety. I was impressed, changes were made to the equipment used, the air flow in the room and the masks and face shields worn by the employees. I even exited the office using a different door (no passing thru a waiting room). I felt safe and was impressed. I highly recommend this practice.