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

dentist in framingham

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.

Medha Singh, BDS, DMD, MS

Dr. Medha Singh was a part time faculty in Periodontology at Harvard School of Dental Medicine, Harvard University. She was an Assistant Professor at Tufts University School of Dental Medicine. She is a Diplomate of the American Board of Periodontology and Academic Fellow of the American Academy of Oral Medicine.

Dr. Singh received her Bachelor in Dental Surgery degree from Government Dental College in India. She received her Doctor of Dental Medicine (DMD) degree, Certificate of Advanced Education Program in Periodontology and Master of Science degree from Tufts University School of Dental Medicine. And received training in Oral Implantology at Harvard School of Dental Medicine, Harvard University as an International Team for Implantology Scholar.

Dr. Singh is a fellow of the American College of Dentists, International College of Dentists, Pierre Fauchard Academy, Omicron Kappa Epsilon National Dental Honor Society, Sigma Xi Scientific Research Honor Society and American Academy of Periodontology Foundation. She is a scholar of the Academy for Academic Leadership and American Dental Education Association Institute for Teaching and Learning Program for Health Professions.

Dr. Singh has served as the Chair of the Periodontics section of American Dental Education Association.  She has also served as a scientific group and network officer of the International Association for Dental Research.

Dr. Singh was an Assistant Professor at Tufts University School of Dental Medicine where she was the periodontal examiner and co-investigator on various research projects in the Division of Oral Medicine and Dental Research.  She has worked as a co-investigator on research funded by the National Institute of Health (NIH), USA. Her research was focused on drug therapies for managing periodontal disease in patients with salivary hypofunction and Sjögren’s syndrome. Dr. Singh has presented her research findings at various conferences held nationally and internationally such as American Academy of Periodontology, American Academy of Oral Medicine, American Association for Dental Research, International Association for Dental Research and the International Symposium on Sjogren’s syndrome. Dr. Singh has published her research findings in the various issues of the Journal of Dental Research.  She has also published book chapters and journal articles on Sjögren’s syndrome.  She is a reviewer of the Journal of Periodontology and the Journal of Dental Education

In addition, Dr. Singh has received several national and international awards for her research and scholarly activities and service. In 2010 she was awarded with an international scholarship granted by the International Team for Implantology (ITI) Foundation, Switzerland.

In addition to her clinical and scholarly activities, Dr. Singh is an active participant in local community activities and organizations.  She has offered her knowledge and skills as a volunteer in underprivileged communities both in India as well as in the Boston area and has served as a mentor and role model to students interested in a career in Dentistry.

Caleb Tam DMD

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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