Endodontic Specialists in Westchester, Greenwich, & Norwalk

Our Locations

Redefining Comfortable Care

We do endodontics and we do it well. Say goodbye to painful root canals and intimidating procedures. At ONE ENDO, we are working hard to end the stigma around endodontics by delivering individualized, pain-free care with advanced technology and modern treatments. Our name is ONE ENDO because we aim to be your one-stop-shop for anything and everything endodontic. Plus, with three locations and an on-call doctor at all times, we’re making it convenient and easy to get the care you need. So whether you’re in Westchester, Greenwich, or Norwalk, we can’t wait to meet you.

Get to Know Your Doctors

You’re in good hands at ONE ENDO. Dr. Mastroianni, Dr. Saccomanno, Dr. Chen and Dr. Cotter are skilled endodontic specialists who share a common passion for delivering compassionate, straightforward endodontic care. Our team is founded in friendship, and we think that you’ll feel like a part of the team right away.

Welcome to Our Office

From the moment you step through our doors, it is our goal to ensure you feel right at home. With comfortable amenities and tastefully appointed furnishings, we’ve created a serene, welcoming environment that you’ll actually enjoy spending time in.

Our amazing team with patient
Our amazing team with patient
A smiling and happy patient
A smiling and happy patient
A smiling and happy patient
A smiling and happy patient
A smiling and happy patient
A smiling and happy patient
A smiling and happy patient
A smiling and happy patient

What We Offer

At our office, our primary goal is to put our patients first. We do this by ensuring our office is equipped with the latest technology and offering flexible scheduling for your convenience. Plus, with three convenient locations, our transformative care is just around the corner.

Advanced Technology

With digital 3D scanning technology and microscopes in every operatory, we are able to offer precise treatment plans and the most comfortable care possible.

More About Our Office

Emergency Appointments

We understand that dental emergencies don’t happen when it’s convenient for you. We strive to make our services accessible by offering same-day, after-hours, and weekend appointments for dental emergencies.

More on Emergencies

No-Pressure Consultations

During our “Save Your Tooth” consultations, you will be given one-on-one time with your doctor. They will get to know you and take a close look at your tooth or teeth as part of your introductory examination. We will also answer any questions you may have and go over a custom treatment plan to get you out of pain or discomfort.

“Save Your Tooth” Consultations

GentleWave® System

With the GentleWave® system, we can typically clean and fill the tooth in just one session and preserve more of the natural tooth structure. This less invasive approach strengthens the tooth, and promotes faster appointments and faster healing, so you can quickly return to your normal routine.

More on GentleWave Procedure

We Value What Our Patients Say

I cannot thank Dr. Mastroianni enough for making what others have described as a painful and frightening experience absolutely painless and easy.  Dr. Mastroianni performed a Root Canal on me with zero pain or complications.  I was truly amazed that an hour after the procedure I was able to eat and drink without any pain and felt zero pain at any moment post operation.  I highly recommend Dr. Mastroianni and his wonderful team.
– Stephen Kliegerman
Great guys and very professional, beautiful office. I actually referred my aunt to them and she couldn’t be happier with the work they did on such short notice! Hope I don’t need a root canal, but if I do, I know where I’m going!
– Kristie Fortuna
I went with Dr Mastroianni with big problem infection , he is the Best in root canal problem, so gentle. I strongly recommend him
– Sandra Nova
I found Dr. Chen, professional and caring 2 qualities that you don't always find in the medical profession. She definitely knows what she is doing!!
– Phyllis Colbert
Dr. Chen is fabulous! She performed my root canal with such ease and made me feel very comfortable and relaxed. I had no pain after or the next day.
Thank you very much Dr. Chen!
– Deidre Tierney
Dr Mastroianni and his team were amazing! They took me right away to treat an infection that needed a root canal. It was fast, easy and painless. I returned for my follow up appointment today and it turned out great.....I will not be needing a second root canal. Thankful for Dr Mastroianni.
– Diane Gomez

Judgment-Free Care, Always.

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