Dentist Framingham | Orris Dental | About Us
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Ali Maddahi, MS, DMD

Dr. Maddahi received his Master of Science in microbiology in 1986. He completed his dental education at Tufts University School of Dental Medicine, graduating with a DMD degree in 1990. In recognition of his academic record and clinical skills while at Tufts dental school, he was elected to participate in an implant program to restore implants and was elected to be a member of the Andrew Bates Dental Research Society. After his graduation he attended a postdoctoral research fellowship in medicine at Harvard School of Medicine in 1992.

Dr. Maddahi has over 25 years of clinical experience and more than 20 years of teaching and research in the field of dentistry. He is currently holding a part-time position as the General Dentist at the Cambridge Health Alliance Dental Clinic’s General Dentistry Residency program, and is a part-time faculty member at the Harvard School of Dental Medicine Department of Oral Health Policy and Epidemiology.

Dr. Maddahi is a respected member of the dental community, holding memberships in the American Dental Association and the Massachusetts Dental Society.

Dr. Maddahi believes that it is important to keep current with evolving techniques and materials, and therefore completes many hours of continuing education courses every year. These include gum treatments, oral surgeries, dental implants, dental crowns, root canal therapy and removable dentures, as well as cosmetic ceramic and veneer restorations to provide the most advanced techniques and treatment options for his patients.

Dr. Maddahi and his wife, Jilla, (our office manager) established Orris Dental in 2010. Dr. Maddahi likes dentistry, his excellent staff and great patients. He also enjoys reading and traveling.

Caleb Tam, DDS

Dr. Caleb Tam was born and raised in the Bay Area, California. He earned his BS in biology (2009) from University of California, Davis, and his MS in biomedical engineering (2013) and DDS (2018) from University of California, San Francisco (UCSF). During his time at UCSF, he received 4 Clinical and Research Excellence Day awards and has been presented with scholarships from the American Dental Association (ADA) Foundation, International/American Association for Dental Research (IADR/AADR), Colgate, Pierre Fauchard Academy, Academy of Osseointegration, and Academy of Dental Materials. After graduating from dental school, Dr. Tam completed a General Practice Residency through Harvard School of Dental Medicine and Cambridge Health Alliance (2019) and has since remained with the program as an attending faculty and practicing dentist. His primary academic/research interests include dental biomaterials, dental regenerative therapies, and the “Oral Physician” training model. Dr. Tam also has a passion for outreach and education as he enjoys volunteering in his local community as well as serving as a mentor for future generations of dental professionals. He is currently involved with efforts such as the African Community Health Initiatives (Boston), Healthy Smiles Project (Cambridge Health Alliance), and Biomedical Careers Science Program (Harvard Medical School).

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