Meet Our Team

Our Office

Marshfield Dental Group is a multi-specialty practice offering you a full range of dental services including preventative care, maintenance, cosmetic dentistry, Invisalign, teeth whitening, periodontal surgery and dental implants.

Insight, experience and dedication to the highest quality of patient care are the hallmarks of our multi-specialty dental team. Our focus is on cosmetic dentistry services, such as dental implants and dental veneers, but we also offer general dentistry and orthodontics. Our general dentists and specialists have received their training from many of the nation’s prestigious educational and dental institutions. It’s our doctors’ skilled combination of art and science that has made Marshfield Dental Group one of New England’s most respected cosmetic dental practices. As a group dental practice, we offer everything from preventive care and general dentistry to sophisticated dental reconstructions.

Meet the Dentists

Sandra Ameri, DMD
General Dentistry

Dr. Sandra Ameri was born and raised in Saddle River, New Jersey. She attended Albright College where she played soccer on the women’s varsity soccer team and earned her B.S degree in Biology and Spanish. After graduating college, she then attended the prestigious University of Pennsylvania School of Dental Medicine where she earned her Doctor of Dental Medicine degree in 2009. Dr. Ameri was chosen to work in the Medically Compromised Clinic, an honors clinic, before earning her degree her senior year.

Dr. Ameri takes pride in her work, gentle manner, and treats all her patients as if they are family. Dr. Ameri enjoys continuing dental education courses, and is Botox certified. 

Dr. Ameri is fluent in Farsi and Spanish, and is a member of the American Dental Association and the Massachusetts Dental Society. 

On her days off she enjoys spending time with her husband and children. Her hobbies included soccer, piano, cooking, gardening and traveling.


Dhafar Witwit, DMD
General Dentistry

Dr. Witwit has over a decade of experience in practicing dentistry overseas. In the United States he’s graduated with honors from Boston University’s Henry M. Goldman School of Dental Medicine and has been working at Marshfield Dental Group since 2015.

Dr. Witwit comes from a family of doctors that instilled in him the love of dentistry. He sees dentistry as a means of improving people’s quality of life and an enjoyable combination of artistry and medical science.

Dr. Witwit is constantly seeking to improve his skills and knowledge. He is a member of the American Dental Association and Massachusetts Dental Society.

When he is not in the dental office helping patients, he enjoys spending time with his wife and two kids, traveling, hiking beautiful moutainscapes, and rooting for the Patriots.


Our Staff Members

Our staff is characterized by three key principles: teamwork, hard work, and experience. And in today’s fast-paced, ever-changing world, these qualities are often hard to come by. With each visit, our patients will find the same, familiar, caring faces dedicated to making your dental experience the best it can be. And because we truly get to know our patients, taking their own concerns to heart, we develop an excellent working relationship with each one, providing personalized, professional care.