Dr Frank Kestler, DDS, second generation Long Island dentist, and his team of dentists, provide tyhe best dental care to patients from the North Fork, New York area with two (2) dental office locations

11535 Main Rd, Mattituck, NY 11952 (631) 298-5021

51A North Ferry Rd, Shelter Island, NY 11964 (631) 749-0539

From routine dental check up visits, oral hygiene, to maintaining your beautiful smile, orthodontics to straighten misaligned teeth and teeth whitening to make your smile the brightest it can be, it is our goal to make and keep your teeth beautiful in a pleasant environment that you will look forward to visiting. Pediatric dentistry and orthodontics also available.

We also gently and carefully fix the dental and tooth problems that may be bothering you. No matter your dental needs, you can count on the dental team at Dr. Frank Kestler's dentist offices.

Highlights, Specialties & Features

  • Root Canals, Teeth Whitening, Pediatric Dentistry, Reconstructive Dental Work

Professional Associations & Certifications

  • American Dental Association, Academy of General Dentistry, New York State Dental Association, Suffo

Serviced Areas

  • North Fork, New York, Suffolk County Long Island

Payment Options

  • Credit Terms Available, Debit Cards, MasterCard, VISA, Dental Insurance

Contact Details

  Person Frank A Kestler DDS
  City Mattituck , NY
  Zip Code 11952
  Address 11535 Main Rd
  Phone Number (631) 298-5021

Business Representative

Frank A Kestler DDS


Frank Kestler obtained his D.D.S. degree in 1987 from NYU College of Dentistry in NY, NY. Initially, he practiced dentistry in Queens County and the Bronx, NY. In 1993, he began working as a Dentist on Eastern Long Island. Today, he is proud to be able to offer his patients the convenience of his services in two locations. He currently has practices located in Mattituck and Shelter Island, New York.

Among the professional memberships Dr. Kestler holds are; American Dental Association, Academy of General Dentistry, the Suffolk County Dental Society, & the New York State Dental Association.

Former Deputy, Medical Examiner's Office, Queens County - Forensic Dentistry

A Dental Officer (Colonel) in the United States Army Reserves, presently stationed at the 4220th United States Army Hospital located in Shoreham, NY.

A sports enthusiast, Dr. Kestler has run in the Army 10 mile marathon six times in Washington, DC and the LI half marathon once.

Dr. Kestler is a member of the American Dental Association and the following

Academy of General Dentistry

The Association of Military Surgeons of the United States

New York State Dental Association

Suffolk County Dental Society

Reserve Officers Association

Military Officers Association of America

Products & Services

Dental Services

Dental Services

We are proud to offer an extensive list of services to our patients including:

Root Canal Therapy, including Re-Treatments using Rotary Endodontics.

Cosmetic Fillings with bioidentically colored material Crowns, including all Porcelain Crowns Veneers

Routine Dental Care, including digital x-rays, and comprehensive examinations and routine cleanings.

Implants for single-unit crowns as well as fixed bridges; also implants to make dentures more retentive.

Pediatric Dental procedures for all children: cleanings, fluoride, sealants, crowns and fillings.

Orthodontics- Early interceptive orthodontics for children Cosmetic Orthodontics for adults

Deep cleanings & scalings for patients with periodontal issues

Surgical Extractions including impacted wisdom teeth

In office tooth whitening using the ZOOM White System

Night guards for people who grind their teeth and sports mouth guards- made in office.

  • I would recommend this business
  • Painless, Gentle, Affordable and Convenient

I used to be scared of going to the dentist. So I often delayed going at all... But not since meeting Dr Frank Kestler and all the lovely staff at their North Fork, Mattituck NY location. After many root canals - that were virtually painless - I can honestly say he is my favorite dentist. Now I have the nicest smile and dont fear the dentist anymore. Highly recommend.

Value for moneyAffordable and Insurances Accepted
Service & supportSo nice
Overall ratingExcellent

Customer Testimonials

I truly believe Dr. Kestler is the best dentist I've ever seen. Myself, my husband and our 4 year old son were just in to see him today and left with big smiles on our faces. They have all top of the line equipment so it's virtually pain free not to mention both Dr. Kestler and the hygienist are amazing with children. I would recommend his practice to everyone, especially if you are in pain, they are the best!

What a great dental experience I had here. The office was decorated so nice. Everyone was so pleasant and best of all they took my fidelis insurance. I didn't feel rushed, they were very thorough. Looking forward to my next visit.

I had a root canal done yesterday and it was my first root canal with Dr Kestler. I am still amazed that I never felt the shot of novacaine or any of the procedure. I am very impressed as I have had a few root canals over the years and usually experience pain during the procedure and worse pain afterwards... Dr Kestler and his staff are professional and sympathetic to your needs.. I have quite a bit more dental work to go but am at ease now about getting it done. I highly recommend his services!

I am terrified of the dentist, both Dr Kestler and his staff took their time, and walked me through every step of the process. This is the first time ever I have not needed gas for a procedure!

This office is so nicely personalized in their dental care and business dealings. Dr Frank Kestler and his team do a really good job of keeping my teeth in great shape. Dr discussed the dental services and exact step by step process so that I understood what was being done and why . This dentist and his superior talents and reasonable pricing has kept me coming back even though I have moved out of the North Fork of Long Island NY. I recommend them strongly to everyone.

Super friendly staff and a BEAUTIFUL office! So much fun to come and see all the holiday decorations – all year round for Easter, St Pats Halloween etc. Make it almost a joy to come to the dentist :0 Everything was explained very well and I wasn't pressured into receiving any additional dental treatments. They remind me of my appointments. Also Dr Kestler took extra time to create a dental treatment plan that worked for my need and my insurance coverage. At first I did not understand and he was very patient with describing all the dental work that I needed. Already have started on my work and so far it is going well – very little to no pain.

What a great dental experience I had here. The office was decorated so nice. Everyone was so pleasant and best of all they took my fidelis insurance. I didn't feel rushed, they were very thorough. Looking forward to my next visit.

Photo Book

Social Activity

Fun Fact Friday! The elephant grinds its molars and grows new ones. This happens six times in a lifetime! An elephant's molar is about 7 inches square and can weigh over 6 pounds
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Fun Fact Friday! The Crocodile Bird flies into the open mouth of a crocodile and cleans the crocodile's teeth!
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Fun Fact Friday! There are 10-12 teaspoons of sugar in a single can of soda.
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Happy Birthday Dania!!
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From all of us, wishing you the Happiest of Birthdays Dr. Kestler!!!
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Fun Fact Friday! The Blue Whale is the largest mammal on earth, but it eats only tiny shrimp because it has no teeth.
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