Chelmsford Dental Specialists Group

Chelmsford Dental Specialists Group Dr. Mario Gatti, DMD, FACP, CAGS
Dr. Mei-Yee Chan
Dr. William Negreiros
Dr. Ohan Manoukian

Our practice, Chelmsford Dental Specialists Group, was founded in 1983 by Dr. Michael Sargent under the name Michael Sargent Dentistry. Today, we provide comprehensive care with a team that includes three general dentists (Dr. Mei-Yee Chan, Dr. Yousef Sidki, and Dr. William Negreiros) and a prosthodontist (Dr. Mario Gatti). We want our patients to be able to participate in their own care, which is

why we put so much emphasis on education. We know that our patients have a wide variety of oral health needs; as such, we provide a wide range of services, from dental crowns for repairing natural teeth to dental implants for filling in the gaps in your smile to teeth whitening for brightening your grin. Our dentists in Chelmsford are looking forward to getting to know you better and forming a trust-based relationship with you. To schedule a consultation with our team, pick up the phone and reach out to us today!

08/22/2026

So happy for our amazing assistant, Andrea, as she steps into this new chapter in life!💍 Wishing you a weekend full of love, laughter, happy tears and unforgettable moments. Here’s to forever! 🥂✨
From your Chelmsford work family. ❤️

Meet the dentist behind the smiles! 👋🦷Get to know a little more about Dr. Negreiros and the friendly face you’ll see aro...
08/20/2026

Meet the dentist behind the smiles! 👋🦷

Get to know a little more about Dr. Negreiros and the friendly face you’ll see around the office. 😊

08/14/2026

Make the dental shape! 📐

Don't wait until the last minute! 📅 Summer appointments fill up quickly.Schedule your child's dental checkup now so they...
08/06/2026

Don't wait until the last minute! 📅 Summer appointments fill up quickly.

Schedule your child's dental checkup now so they're ready to head back to school with a healthy confident smile. ✨🦷

07/30/2026

Behind every healthy smile is a great X-ray! It may not be your favorite photo, but it's one of the most important ones we take. 🦷✨

07/23/2026

You definitely want to get your cleaning done at Chelmsford Dental Specialists Group 😊

07/17/2026

Now it’s your turn! What’s one must-have item that you always bring in your dental travel kit? ✈️

Share it in the comments! 👇 We might discover a few new travel favorites.

Five-star experiences never get old! Thank you for your thoughtful review and for choosing Chelmsford Dental Specialists...
07/09/2026

Five-star experiences never get old! Thank you for your thoughtful review and for choosing Chelmsford Dental Specialists Group. We appreciate your trust in our team! 😊

07/02/2026

Happy Fourth of July from our dental family to yours! ❤️🤍💙

*We will be closed Friday, July 3rd*

We hope your day is filled with fireworks, fun, and plenty of reasons to smile. Stay safe and enjoy the holiday!

We'd like to wish a very Happy Birthday to Colleen! 🍰❤️Thank you for everything you do behind the scenes and beyond. Hav...
06/24/2026

We'd like to wish a very Happy Birthday to Colleen! 🍰❤️

Thank you for everything you do behind the scenes and beyond. Have a great day!

Address

21 Chelmsford Street
Chelmsford, MA
01824

Opening Hours

Monday 8am - 6pm
Tuesday 8am - 7pm
Wednesday 8am - 6pm
Thursday 8am - 5pm
Friday 8am - 2pm
Saturday 8am - 2pm

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