Dr. John P. Gentile DDS General & Cosmetic Dentistry

Call 631-269-6206

Our Mission

Our entire team is dedicated to providing you with the personalized, gentle care that you deserve. We are a dental practice devoted to restoring and enhancing the natural beauty of your smile using conservative, state-of-the-art procedures that will result in beautiful, long lasting smiles! We provide comprehensive treatment planning and use restorative and cosmetic dentistry to achieve your optimal dental health.  

As a practice, we are true believers that preventive care and education are the keys to optimal dental health. We strive to provide "dental health care" vs. "disease care".  

We are proud to serve Kings Park and the surrounding communities Commack, Smithtown, East Northport and Fort Salonga.

We thank you for allowing us to take care of your dental needs and look forward to serving you.



As dental professionals it is our priority to provide quality dental care you can trust.


Just a quick note to let you know how great my most recent office visit was. As a Doctor myself you would expect me not to be nervous about going to the dentist. But a a bad visit from a previous dentist left me fearful. Your care, chairside manner and terrific technique made for a truly wonderful experience.

Thank You, Dr. Don

Dr. Gentile Rocks! I've been terrified of dentists my whole life until I became a patient of Dr. Gentile's. I trust dentists again and him 100%.

Victoria G

Thank you for the opportunity to work with you in your beautiful office a few weeks ago. It was a pleasure to treat patients in a low stress, tidy and clean environment. I enjoyed working with your newer technology. The patients seemed very much at home and enjoyed their dental visits. They seemed more than willing to listen to home care and treatment strategies from the knowledge and experience that your office had to offer.

You must be very proud to have achieved what many offices struggle to have. You are an asset as a healthcare service provider to the Kings Park Community. I wish you all the best in your patient treatment and further practice development endeavors.

Most Sincerely, Christina Dental Hygienist

Friendly, talented, and the right solution the first time for my sensitive teeth. I tried other dentists near home in NJ and had procedures that didn't work. Dr Gentile is near my Moms home, so for years I've driven to LI. My hygienist and the office staff is great too.

Kathy C

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Contact Us

We encourage you to contact us with any questions or comments you may have. Please call our office or use the quick contact form below.


What does your smile say about you? Let us help you radiate confidence with a healthy smile.