About Our Doctors

Since 1982, Thomas Family Dental Associates has been a trusted provider of comprehensive dentistry in Medfield, Massachusetts. Our dentists, Dr. Richard Thomas, Dr. Brian Thomas and associates, can help you create a healthier smile that you will look and feel great in. If you are interested in coming to our office for your next dental treatment, call our office for an appointment.

dr. collins

Ryan Collins, DMD

General Dentistry

Dr. Collins grew up in Southern Maine and received his bachelor degree from St. Anselm College in Manchester, NH. He then attended the Tufts University School of Dental Medicine and completed an Advanced Education in General Dentistry residency at the University of Connecticut. Dr. Collins is known for his gentle manner and the care he provides for his patients. He enjoys hiking, Boston sports, and spending time with his wife and two daughters.

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Erica Davis, DMD

General Dentistry

Dr. Erica Davis graduated from Tufts University School of Dental Medicine in 2016, and then completed a 1-year Advanced Education in General Dentistry residency at the Providence VA Medical Center. For the past four and a half years, Dr. Davis has been providing dentistry for underserved populations in Dorchester, MA in a public health setting. She enjoys all aspects of dentistry, especially doing esthetic cases and working with children of all ages. She will be joining the practice part-time in November. Dr. Davis has a personal connection to the town of Medfield, as it is home to her horse Ted, who she visits daily. In her spare time, she also enjoys cooking, fantasy football, and spending time with her family and friends. 

Richard Thomas, DDS

Richard Thomas, DDS

General Dentistry

Dr. Richard (Rick) Thomas has been practicing in the area since 1986. He received his undergraduate degree at the University of Notre Dame in 1982 and earned his Doctor of Dental Surgery at Georgetown University’s dental school in 1986. His commitment to continuing education remains a hallmark, and he is involved with the Dawson Academy of Continuing Education. He attends the Yankee Dental Congress in Boston, Massachusetts, annually.

RickfamDr. Richard Thomas is a member of the American Dental Association®, Massachusetts Dental Society and the American Academy of Oral Systemic Health.

He and his wife, Patricia, have two children, Garrett and Caroline. Together, they enjoy golfing, skiing and cooking.

“My patients and staff make dentistry enjoyable. I strive to treat each patient individually, listening to their concerns and working with them to get their oral health into great condition.” — Richard Thomas, DDS

Brian Thomas, DDS

Brian Thomas, DDS

General Dentistry

For over 30 years, Dr. Brian Thomas has worked in this community providing high-quality dental care. He is a graduate of Providence College, completing his Bachelor of Science in biology in 1977. After completing his undergraduate studies, Dr. Brian Thomas earned his Doctor of Dental Surgery at Georgetown University’s dental school in 1981. He is dedicated to continuing education, and is part of the Dawson Academy of Continuing Education.

Dr. Brian Thomas is a member of the American Dental Association®, Massachusetts Dental Society and South Shore Dental Society.

He and his wife, Nancy, have four children: Katie, Brian, Jenna and Brett. When not at work, he enjoys skiing, golfing and gardening.

“My goal as a dentist is to treat my patients with the care and compassion I would a family member. I provide high-quality dentistry to help my patients reach their goals of a beautiful, healthy smile.” — Brian Thomas, DDS

Peter Rider, DMD

Peter Rider, DMD

Endodontics

Dr. Peter Rider has been providing dental care for over 30 years and practicing endodontic care since 1977. After receiving his Bachelor of Science degree at Providence College in 1967, he went on to receive his DMD degree from the Tufts University School of Dentistry in 1971. Dedicated to furthering his knowledge of endodontic care, Dr. Rider then completed his degree in Specialty of Endodontics at the University of Buffalo Dental School in 1977.

Dr. Rider is a member of the American Dental Association®, American Association of Endodontics® and Massachusetts Dental Society.

Born and raised in Yeadon, PA, Dr. Rider went on to marry his wife, Debbie, and they have two children, Matthew and Daniel. Residing in Boston, MA, he enjoys skiing, playing tennis, cycling and gourmet cooking.

Gyusik Cho, DDS

Gyusik Cho, DDS

Periodontics

Dr. Gyusik Cho provides high-quality periodontal care for our patients. He received his Bachelor of Science from Georgetown University in 2005, then went on to pursue his Doctor of Dental Science from New York University College of Dentistry, graduating in 2012. He then received his Master of Science and Periodontal Certificate in 2015 from Boston University.

Every year, Dr. Cho continues to keep up to date on new techniques and procedures that will benefit patients and their smiles. He has received advanced training from the Boston University Goldman School of Dental Medicine, completed his post-graduate periodontology program in 2015 and has a certificate in periodontology. Dr. Cho’s goal is to treat every single patient with care.

Dr. Cho is a member of the American Association of Periodontology® and Massachusetts Dental Society.

Dr. Cho’s primary focus of treatment is on non-surgical and surgical periodontal therapy such as osseous surgery, crown lengthening, bone grafting, soft tissue surgery and implants. He has been practicing in the area since 2015, where he lives with his wife and child. They love to travel and spend time together.