Dr. Kerry Bryant, DMD, FAGD

Dr. Kerry Bryant was born in Camden, Maine in 1953, and grew up in Searsmont, Maine. He graduated from Belfast High School in 1970. Bryant later attended the University of Connecticut Undergraduate School and received a Bachelor’s Degree in Biology in 1974. From 1974-1978, he attended the University of Connecticut School of Dental Medicine and received his Doctor of Dental Medicine, D.M.D. In 2000, he passed a national qualifying and met other requirements in continuing education earning him the prestigious Fellowship Award for the Academy of General Dentistry, F.A.G.D. Fewer than 10 percent of general dentists receive this award. He is a member of the American Academy of Cosmetic Dentistry. Dr. Bryant focuses primarily in treatment of the TMJ and other forms of orofacial pain. He’s one of the few dentists in Maine who has completed the Piper TMD continuum, a world class training program for dentists and oral surgeons looking to increase their abilities in treatment of TMJ disorders.

When he is away from the office Dr. Bryant enjoys almost any kind of outdoor activity; including hiking, scuba diving, water skiing, downhill and cross-country skiing. Dr. Bryant also volunteers at the Root Cellar, an inner-city clinic in Portland, Maine.

Dr. Nicholas Roy, DMD, MAGD

Dr. Nicholas Roy was born and raised in Lewiston, Maine. Growing up he enjoyed playing hockey, running, and track and field. He attended UVM for his undergraduate studies, and upon completing his B.S. in Chemistry, Dr. Roy headed south to The University of Connecticut School of Dental Medicine, a top-rated dental school. It was an immensely rewarding educational experience, and Dr. Roy took advantage of the many opportunities presented to deepen his knowledge. During this time, Dr. Roy developed a passion for comprehensive care, which is a style of dental treatment that looks at the big picture of a person’s mouth and related systems, along with their overall systemic health. In order to help patients with such complex needs, he decided to enter an Advanced Education in General Dentistry (AEGD) program in Richmond, Virginia. This experience gave him the confidence and skills necessary to perform implant dentistry, full mouth rehabilitation, sedation dentistry, TMJ treatment, and complex surgical treatment.

Over the past several years, Dr. Roy has received his Mastership in the Academy of General Dentistry, an honor only provided to 2% of general dentists in the US. This has provided him the skillset necessary to help patients in a high-level and comprehensive manner. In addition, Dr. Roy is a qualified dentists in the American Academy of Dental Sleep Medicine, and has completed the AADSM Mastery Series in treatment of Sleep Disordered Breathing and related conditions. In 2025, Dr. Roy received the rare Lifelong Learning and Service Recognition award from the Academy of General Dentistry, an award reserved for a career-long commitment to continual learning and exhibiting a high-degree of altruism for the underserved and also contributing to organized dentistry.

Dr. Roy resides in Biddeford with his wife Danielle and 3 children. When not “dentisting”, Dr. Roy is fishing, hiking, biking, playing guitar, or making sandcastles with the kids.

Dr. Jason Greenbaum, DMD

Dr. Greenbaum grew up in New Jersey but headed north after high school, where he quickly discovered a love for Maine. He earned his Bachelor of Science degree in Biology from the University of Southern Maine before continuing on to the University of New England College of Dental Medicine to fulfill his lifelong goal of becoming a dentist. Dentistry runs in his family—his father and uncle are both practicing dentists.

While studying at UNE, Dr. Greenbaum participated in two externships that allowed him to deliver dental care to underserved rural communities across Maine and Vermont. After earning his dental degree, he pursued advanced training through a General Practice Residency at the University of Vermont Medical Center in Burlington. There, he treated patients in both hospital and clinical environments, gaining valuable experience in cosmetic procedures, dental implant placement, and TMJ disorder management.

Outside the office, Dr. Greenbaum lives in Old Orchard Beach with his wife. When he’s not seeing patients, you can find him outdoors, playing guitar, or performing music—he’s a multi-instrumentalist and vocalist who founded a dental school rock band aptly named Nitrous Roxide.

He is thrilled to be part of the Acadia team and looks forward to meeting new patients and continuing to serve the Maine community he calls home.

Zachary Reagan, DMD, FAAID

Dr. Reagan is a dedicated provider at Acadia TMJ and Sleep Wellness, where he focuses on helping patients find relief from jaw pain, sleep-disordered breathing, and complex oral function issues. Dr. Reagan’s passion for comprehensive patient care began while pursuing his Master of Human Anatomy and Physiology at Pennsylvania State College, which laid the foundation for his hands-on, systems-based approach to dentistry. He earned his Doctor of Dental Medicine from the University of New England School of Dental Medicine, where his interest in craniofacial anatomy and airway health deepened.

Dr. Reagan is an Associate Fellow of the American Academy of Implant Dentistry (AAID) and a graduate of the prestigious New England Master Track Program, a rigorous post-doctoral education series in advanced restorative and surgical dentistry. He brings this expertise into his work at Acadia, offering individualized treatment plans for patients struggling with TMJ dysfunction, sleep apnea, craniofacial pain, and complex restorative needs. He is also the primary surgical provider for all Acadia’s non/semi-surgical approaches to tongue tie releases, arch expansion, implants and much more!

In addition to private care, Dr. Reagan is proud to treat veterans through the VA, providing compassionate, high-level care to those who’ve served. His clinical offerings include implant-supported rehabilitation, full mouth reconstruction, TMJ appliance therapy, and airway-focused dentistry.

Above all, Dr. Reagan is committed to helping patients achieve better health and improved quality of life—whether that’s through pain relief, better sleep, or a more confident smile.