Letter to our Current and New Patients regarding COVID-19 - Click Here

Modern dentistry in a calm and relaxed environment.

The team at Peter Breen, DMD would like to welcome you to our practice. From general cleaning and hygiene to advanced restorative or cosmetic dentistry, we provide comprehensive dental services to help you maintain or restore healthy teeth and a beautiful smile. We strive to make each dental visit a positive and gentle experience for our valued patients.

Welcome to the Dental Practice of Peter Breen, DMD

Dr. Breen has been practicing family dentistry in Groton since 1991. Our experienced staff is ready to provide you with "best-patient" care for your personal dental health. We thank you for choosing our practice and entrusting your dental health to us. Don’t hesitate to call our office with any questions you may have. We look forward to caring for you and your family.


Dr. Breen is a saint. Our family dentist recently retired, we haven't found a new practice yet, and with the world in the middle of a pandemic all dentists are closed except for emergencies until April 7th at least.

My husband developed an awful toothache and tried to tough it out for a few days but swelling started today. Looked around for help.

We called the number Dr. Breen put up for his patients. He's never met us but he took the call, was amazingly gracious and caring, set up some antibiotics to pick up and referred us to an oral surgeon who could see my husband tomorrow. He actually called US back a second time to make sure things were okay.

In a frightening time, this means so much. Hoping to become regular patients of this practice. Very grateful.


Dr. Breen's entire office staff is friendly, supportive, professional, and always kind. With COVID 19 hovering, Dr. Breen has taken extraordinary measures to secure specialized products and instruments to maintain optimum cleanliness throughout the facility and day. I felt very confident of my safety while I was there.

Winnie B. July 14, 2020

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Implant Restorations

Don't let missing teeth destroy your vibrant smile and damage your oral health. Dental implants can produce lasting restorations that will renew your appearance.

Cosmetic Dentistry

If you want to revitalize your smile, our skilled dentist can craft a gorgeous image courtesy of modern cosmetic dentistry.

Hybrid Dentures

With a hybrid denture, an individual can have a denture that is securely fixed to implants so it stays in the mouth, doesn’t move, and is closer to natural teeth.


For adults and older teens, Invisalign clear aligners allow you to achieve a flawless smile without the hassle and embarrassment of ugly metal brackets.

Family Dentistry

With our family dental care, we can keep your teeth and gums in top condition. Regular checkups allow us to monitor your oral health and preserve your gorgeous smile.


MON 9:00 AM – 7:00 PM

TUE 7:00 AM – 4:00 PM

WED 7:00 AM – 5:00 PM

THU 7:00 AM – 4:00 PM

Peter Breen, DMD

292 Main Street

Groton, MA 01450

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