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About Your Dentist

About Your Dentist

John Messinger, DDS

Dr John Messinger II, DDS, PhD continues to evolve and grow his Plymouth, New Hampshire based general dental practice. In addition to running a successful general dentistry practice, he has become looked upon as a leader and is involved in helping the local communities. Dr. Messinger has a passion for learning and using his understanding of science to help his patients lead healthier lives each day.

Dr. Messinger has completed Over 400 hours of continuing education courses and holds a Ph.D. in Organic Chemistry. Prior to moving to the Lakes Region to start Main Street Dental, Dr. Messinger owned Rockingham Dental in Epping, NH.

With the help of Dr. Messinger's wife, Susan, Main Street Dental opened its doors in Plymouth on Feb, 12, 2002. It has been a family owned and operated practice ever since.

Dr. Messinger's commitment to family is reflected in his dental philosophy. John says, "I wouldn't recommend or do anything to your mouth that I wouldn't recommend or do in my own family member's mouths. In his spare time Dr. Messinger enjoys hiking, wood working and studying history.


  • Earned a Ph.D. in Organic Chemistry in 1986 from the University of Buffalo
  • Attained tenure professor status at the State University College at Buffalo while teaching conservation science in the Art Conservation Dept. from 1986-1993
  • Completed training in dental implants, root canal therapy, crown and bridge, E4D same day crown technology, training in invisalign, mini implants, dentures, partials, socket preservation, Hard and Soft Tissue Lazer Technology, Zoom Whitening.
  • Completed 18 month Dental Management training and leadership training school in Florida.
  • Supervising dentist for SAU 48 school hygiene program.
  • Member of American Dental Society, NH Dental Society, Lakes Region Dental Society, American Academy of General Dentistry
  • Member of Plymouth Rotary since 2002 served as President in 2004-2005.


Carolyn Belyshev, DDS

"The tooth and whole tooth and nothing but the tooth."

My Mission

"To be able to make a difference one tooth at a time, one smile each day and at least one life in my lifetime. To treat each person like they matter. To teach young kids how to take care of their teeth, so that they can keep them as long as possible. I believe in early prevention."


Howard University, Doctorate of Dental Surgery – Washington, D.C.

University of Colorado, Bachelor's in Psychology – Denver, Colorado

Continuing Education & Professional Memberships

Dr. Belyshev is currently a member of Shared Hope International. Previously being a member of the Political Action Committee, the Colorado Dental Association, and the Colorado Springs Dental Society.

Life & Hobbies

Dr. Belyshev believes you should live each day like it's your last, never be afraid to try new things, and that life is an adventure, so why not enjoy it. Her hobbies are all scattered, she likes to crochet hats and beanies to donate to the cancer ward of Children's Hospital. She also enjoys sewing, DIY crafts, cooking/baking, hiking, watching movies, spending time with my husband, playing video games, and traveling and exploring. Her and her husband are advocates for rescuing victims of human trafficking, and are volunteer dentist for Sarah's Home, an organization in Colorado that rescues trafficked kids ages 8-16 years old.