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About

Smiles of Groton is a family-owned dental practice in Groton, MA, offering a full range of dental services including preventative, restorative, cosmetic, emergency, and implant dentistry. Located at 292 Main St, Groton (two offices listed at the same address), the practice emphasizes convenient, patient-focused care. Key details: contact info info@smilesofgroton.com, phone 01450-1236 or (351) 251-1230; LinkedIn presence; SIC/NAICS codes 80/802 and 62/621. Monthly site traffic is around 755 with low bounce (0.4%), indicating modest online engagement.

Clinic Type

Dental

Address

292 Main St, Groton, Massachusetts 01450, us

Phone

(978) 448-5241

Email

Opening Hours

Not published — contact the clinic to confirm hours.

Services Offered

Technology & Equipment

  • state-of-the-art technology

Team

  • Dr. Marc Valli, Dr. — Dentist
  • Dr. Molly Valli, Dr. — Dentist

Insurance & Payment

Languages Spoken

Awards & Accreditations

  • 4.9 Stars With Over 350 Reviews

Social Media

Photos

What Patients Say

Overall sentiment across review platforms: very positive

  • Yelp: 5.0 out of 5 stars (7 (on Yelp via MapQuest/Yelp platform))

Patients praise

  • Dr. Breen is described as friendly, compassionate, kind, and knowledgeable
  • Comfortable and relaxing environment for patients, including those with dental anxiety
  • Staff is thorough and takes time to explain procedures and dental health details
  • Consistent positive experiences and patient outcomes reported

Common complaints

  • No specific complaints regarding the practice were identified in public sources; the overall sentiment is consistently positive.

"Wonderful wonderful wonderful. After having the most horrible experience at a prior dentist, I found Smiles of Groton caring, gentle and knowledgeable."

Smiles of Groton website testimonial

"Dr. Breen is an incredible dentist and better yet, he's a great person too! He's so friendly and personable and takes the time to really explain what is going on with your teeth and why he is doing it."

Yelp review (via MapQuest)

"Dr. Peter Breen and his team are fantastic, I have had so many prior experiences that left me wanting to avoid the dentist. Dr Breen made me comfortable and confident during my visit."

Yelp review (via MapQuest)

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 11, 2026.

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