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Our Team

Our dental staff is a team of highly skilled, educated and sensitive individuals that assist Dr. Theriault in providing the ultimate in dental care to all of our patients.

Dr. Theriault and his staff provide quality dentistry for patients of all ages. We offer a wide range of dental services including preventive, cosmetic, restorative, and reconstructive dentistry. We pride ourselves on our patient centered practice. We do everything possible to make dental visits pleasant for all patients. We have earned the loyalty of our patients, many of whom have been with us since 1951.

Dr. David A. Theriault
Dr. Theriault is from Salem, Massachusetts. He graduated from Maine Maritime Academy in 1968 with a BS in Mechanical Engineering. After six years in the engineering field Dr. Theriault attended Boston University School of Graduate Dentistry graduating in 1980 followed by one year general practice residency in the Department of Oral Surgery at Boston City Hospital. Upon completion of his residency program, Dr. Theriault joined the staff at Harvard Community Health Center in Boston. During that time he taught operative and prosthetic dentistry in the undergraduate clinic at Harvard School of Dental Medicine until relocating to Maine in 1990.

Dr. Theriault attends numerous continuing education courses yearly. He is a member of Donated Dental Services and participates in the Knox County Dental Health Center.

In addition Dr. Theriault is a member of:
  • American Dental Association
  • Maine Dental Association
  • Midcoast Dental Society
  • Alfa Omega Dental Society
Dr. and Mrs. Theriault have two grown children and one grandchild. Dr. Theriault enjoys skiing, bicycling, sailing and hiking. He has coached both youth basketball and little league baseball. He has been an active member of the Rockland Rotary Club for the past 20 years and served on its board of directors.

Nicki Powell-Fiske - RDH
Nicki was born and raised in Mid-Coast Maine. She and her husband Mark are building their new home in Tenants Harbor. She has over 18 years experience in the dental field. The last 10 years she has spent working with Dr. Theriault as both an assistant and hygienist. Her past assisting experience, education and training in non-surgical peridontal treatment with the use of lasers at the LVI institute and ongoing continuing education give her the skills and knowledge to educate and communicate with her patients. She is committed to informing her patients concerning their dental health needs. Helping them to make informed decisions regarding their treatment. She is a great listener and strives to deliver comfortable, personalized and quality care. She works with her patients to find the best solutions for individual to achieve their dental goals. She feels her patients are like a 2nd family and wants the best for them.

Dr. Theriault and Nicki enjoy volunteering for the Mid-Coast Dental clinic throughout the fall and winter every year. She also enjoys being with her family, fishing and boating off Port Clyde and loves animals.

  • University of Maine Graduate associates degree in Dental Hygiene 1999
  • Southeastern Academy graduate for Travel/Tourism 1988

Susan S. Vollhardt - RDH
Susan moved to Maine from Connecticut in 1989 with her 2 children. A graduate of Fones School of Dental Hygiene she has primarily worked in private practices, but took time out to start the Knox County Dental Clinic in Rockland, Maine. The dental clinic provides free dental care to low income patients. She enjoys the outdoors, horses, goats, dogs, her home, and the beauty of the Midcoast area.


David Theriault DMD • (207) 594-8353
19 Summer Street • Rockland, ME 04841