Our Staff


All our professionals at Groton Dental Group maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in dentistry.

Dennis Flanagan, DDS MSc

Doctor Dennis Flanagan

Dr. Dennis Flanagan is the managing partner of a two location private general dental group practice with 35 employees. He is a diplomate of the American Board of General Dentistry, International Congress of Oral Implantologists and American Board of Oral Implantology/Implant Dentistry. Dr. Flanagan is an Attending Dentist for the US Olympic Committee and the Windham Community Memorial Hospital where he was Chief of Dentistry for more than 8 years.

Dr. Flanagan has published over 100 articles in dentistry and holds six US patents on medical and dental devices. He has made many presentations at national and international dental conferences. Dr. Flanagan is an Honored Fellow of the American Academy of Implant Dentistry, Fellow of the Academy of Osseointegration and American Board of Forensic Dentistry. He is on the editorial board of several dental journals. He is a former editorial consultant to the Academy of Osseointegration, and former editor for Oakstone Medical publishing. He is an examining board member of the American Board of General Dentistry and American Board of Oral Implantology/Implant Dentistry. He is a senior associate editor for the Journal of Oral Implantology. He has been a paid consultant to Proctor and Gamble, Blue Cross, and National Medical Insurance Consultants. He is a Georgetown University School of Dentistry (DDS) graduate, has studied oral implantology at Harvard University Dental School (certificate) and at the Goethe Medical University, Frankfurt Germany (MSc). He is an associate professor in dental medicine at Lugano University of Switzerland Malta.


  • University of Maryland: BS Chemistry and Math, Chemistry Honorary
  • Georgetown University: Research Fellowship - four awards in radio - calcium absorption - ADA presentation
  • Harvard University School of Dental Medicine- Oral Implantology CE- P Schnitman
  • Oral Cancer Student Intern - Memorial Sloan-Kettering Medical Center New York, NY
  • CE> 7000 CEUs on AGD registry
  • Goethe Medical University, U of Frankfurt, Germany- MSc Oral Implantology 


  • Associate Professor of Dental Medicine, Lugano U of Switzerland HEI- Malta
  • Master- Academy of General Dentistry
  • Diplomate- American Board of Oral Implantology/Implant Dentistry
  • Diplomate- International Congress of Oral Implantologists
  • Fellow- American Board of Forensic Dentistry
  • Fellow/Honored Fellow- American Academy of Implant Dentistry
  • Diplomate- American Board of General Dentistry
  • Fellow- Academy of Osseointegration
  • ResearchGate score: 30.84, 87.5%- Impact Points 73.91

Download Dr. Flanagan's CV

Nicolina, Practice Manager


Practice Manager of CT Dental Group for 37 years. When not at work, I love spending time with my 5 grandchildren and family. I love cooking and gardening. Ask me "What is my favorite dish to prepare?"

Kathy, Insurance Coordinator


Kathy is the insurance coordinator for the Groton Dental Group. Kathy's loyalty and longevity for over 30 years is an asset to researching and solving all of your insurance needs. In her free time she enjoys the beach, snowmobiling, gardening and dinners with family and friends.

Erica, RDH


Erica has been a Dental Hygienist for over 8 years. She graduated from Briarwood College. In Erica's free time she enjoys, boating, the beach, fishing, spending time with her husband and dog.

Carolyn, RDH


Carolyn graduated in 1989 from Eric Community College in NY. She has been at Groton Dental Group for 28 years. Carolyn became certified in 2005 for local anesthetic. She loves teaching and working one on one with her patients. She is a mother of 3 and married to a handsome remodeler. In Carolyn's free time she enjoys sports as well as many other fitness activities with family.

Suzanne, RDH


Suzanne has been a Dental Hygienist for 29 years. She graduated from Suny Farmingdale with an Associates Degree, UConn with a Batchelors Degree, and Rensselaer at Hartford with a Masters Degree. Some of Suzanne's interests include: music, animal rescue, alpacas/ fiber, gardening, and spending time with family and friends.

Renee, Dental Assistant


Christine, Dental Assistant


Christine loves her profession, she has been working at the Groton Dental Group for over 10 years. She loves the patients! Christine is a social butterfly and likes making new friends. In her free time she enjoys almost any outdoor activity as well as exercises.

Aisa, Dental Assistant


Aisa has been with Groton Dental Group for over 20 years. She loves working with the public. She enjoys listening to music, the beach, going to concerts and hanging out with her friends and family.

Christina, Dental Assistant


Elissa, Dental Assistant


Elissa went to Huntington Institute for Dental Assisting. She has been in the dental field for 35 years. She has worked for the Windham and Groton Dental Group since 2014. In her spare time she enjoys decorating and painting.

Office Hours

Groton Office

Monday: 8:00 am – 6:00 pm
Tuesday: 7:30 am – 5:00 pm
Wednesday: 8:30 am – 5:00 pm
Thursday: 8:00 am – 5:00 pm
Friday: 7:30 am – 5:00 pm
Saturday: 8:30 am – 1:00 pm

Windham Office

Monday: 7:30 am – 5:00 pm
Tuesday: 7:30 am – 5:00 pm
Wednesday: 7:30 am – 7:00 pm
Thursday: 8:30 am – 5:30 pm
Friday: 7:30 am – 4:30 pm
Saturday: 8:30 am – 1:30 pm