MDA Officers

Serving as Officers for the 2023-24 MDA Board of Directors are Dr. Shanna Gagnon as President, Dr. Adam Saltz as President-Elect, Dr. Matthew Lawler as Vice-President, Dr. Dean Tourigny as Secretary, and Dr. David Kerr as Treasurer. 
Dr. Shanna Gagnon
Dr. Shanna Gagnon, who practices in Farmingdale, earned her DMD at the University of Connecticut School of Dental Medicine in 2004. She joined her father, Dr. Donald Gagnon, in private practice immediately after dental school. She hired an associate, Dr. Jessica Sikora, to help her with patient care after the retirement of her father. First chosen as the Kennebec Valley Dental Society representative to the Maine Dental Association Board of Directors, Shanna has served on the board for 15 years.
Adam Saltz
Dr. Adam Saltz practices in South Portland. He completed his periodontal training at the UT Health Science Center at San Antonio. He attended Nova Southeastern University for dental school, where he also received his Master of Public Health. Dr. Saltz actively contributes to several scientific journals and lectures nationally. He is an assistant clinical professor at the University of New England and faculty consultant to Kansas City University.

He served as a public health consultant to the American Dental Association (ADA) and led the American Student Dental Association as national editor- in-chief, while in dental school. Dr. Saltz currently chairs multiple state and First District committees. In 2023, he was chosen to serve on the ADA New Dentist Committee as well as recognized by the ADA with their 10 Under 10 Award for his contributions to organized dentistry, education, and community outreach as a new dentist.
Matthew Lawler
Dr. Matthew Lawler has been practicing at Oral Surgery Associates in South Portland since completing residency. He is a native of Sedona, Arizona and graduated from the University of Arizona Summa Cum Laude double majoring in Biochemistry and Molecular Biophysics and Molecular and Cellular Biology in 2007. He attended dental school at the Harvard School of Dental Medicine graduating with honors in 2012. While in dental school he established a love for oral surgery and completed a one-year research fellowship in Pediatric Oral Surgery at the Massachusetts General Hospital. He completed his MD degree at Harvard Medical School in 2015 and completed his Oral Surgery Residency in 2018 where he served as chief resident at both Massachusetts General Hospital and Boston Children’s Hospital.

Dr. Lawler is a member of American Association of Oral and Maxillofacial Surgeons (AAOMS), American Dental Association (ADA) and Maine Dental Association (MDA) where he serves on the executive board. During his training, he served as Program Liaison and District Representative for the resident organization of AAOMS and developed a passion for research publishing multiple peer-reviewed articles and book chapters on facial trauma, orthognathic surgery, and advanced imaging techniques.
Dr. Dean Tourigny was born in Biddeford, Maine. He received his bachelor’s degree from Dartmouth College and his dental degree from Northwestern University Dental School. Three years at Edwards Air Force Base taught him the practice of dentistry. He then returned to his hometown and opened a general practice after a brief associate position.

Since returning, he has been active in organized dentistry. He served many years as York County Dental Society (YCDS) representative as well as president of the YCDS and the MDA. He is currently Secretary of the MDA and serves on the Committee of Government Relations (CGR). When not working he enjoys landscaping, bird watching, and walking the dog with his wife Kathleen. There are those that feel he spends too much time on the Pickleball courts, but these people are ignored!
David Kerr
For over three decades, David R. Kerr, D.D.S. has had an established dental practice in the greater Portland area, and over this time, he has accumulated a substantial background of clinical experience and has seen a multitude of cases.

Dr. Kerr graduated from St. Lawrence University in 1974. He then graduated from the University of the Pacific in 1978 in San Francisco and completed a General Practice Residency in New York City at the Long Island Jewish Hillside Medical Center. He moved to Maine in 1985.

A member of six different organizations, Dr. Kerr has held many positions within the Maine Dental Association, the latest being Treasurer. His current research is on Sleep Apnea Prevalence in a General Dentistry Population and Development of Decision Support System to Enhance Clinical Decision Making and Patient Care Using Data Analytics. With a Master’s in Business Administration, Dr. Kerr provides consultation support to students and other professionals in Decision Support Software Development and Econometrics.

Dr. Kerr is married to Dr. Carol Kerr, a clinical counselor. Together they have two adult sons. His hobbies include anything outdoors: skiing, snowshoeing, sailing, hiking.

Therese Cahill

Therese Cahill, Maine Dental Association Executive Director 

Therese Cahill brings a breadth of experience to the position, previously serving as the director of the Office of Child and Family Services at the Maine Department of Health and Human Services, the director of constituent services at the Office of the Secretary of State, a grants and contracts administrator at Maine Quality Counts, an investigator for the Maine Board of Dental Practice, and as a school counselor and a speech therapist in school systems in coastal, western, and central Maine. She has also taught as an adjunct lecturer at the University of Maine at Augusta.

Cahill received her bachelor’s degree in speech correction from the University of Maine at Farmington and her master’s degree in school counseling from the University of Southern Maine. She has been involved in several community organizations and groups, including the Maine School Counselors Association, the Maine Association for Play Therapy, the Maine Heart Association, OHI Maine, and Big Brothers/Big Sisters of Kennebec Valley.