Our Caring, Professional Boston Team

Our office uses advanced technology and modern techniques to ensure the highest quality dental care with minimal discomfort.

Steven Shapiro, DMD

Dental Director

Dr. Steven Shapiro is the Dental Director at Great Hill Boston and has been practicing Dentistry for over 10 years.

Dr. Shapiro is a graduate of McGill University School of Dental Medicine, where he earned his DMD. While at school, Dr. Shapiro was named the winner of the Canadian Dental Association’s President’s Award in recognition outstanding qualities in leadership, scholarship, character and humanity. He was awarded Gentle Dental Associate Dentist of the Year in 2009 and has since continued providing the best patient-care.

Member of:

  • American Dental Association
  • Massachusetts Dental Society

While not in the office, Dr. Shapiro enjoys golfing, playing basketball, skiing, and spending time with his family at their residence in Needham.

David P. Pawlowski, DDS

Improving the health of those around me is very rewarding. For nearly 30 years, I have had the opportunity to meet so many people from my community and exert a direct, positive influence in their life. The education we provide to our patients gives them the knowledge and motivation to take control of their dental health.

  • Doctorate of Dental Surgery – Marquette University

Member of:

  • American Dental Association
  • Massachusetts Dental Society

I am originally from Lynnfield and have lived in North Reading for the past 20 years. My wife Jeri is a dental hygienist, and we have three sons – David, Will, and Dan. My leisure time is usually spent sailing, playing musical instruments, exercising, reading, and traveling. I am also active in my church and with community sports

Joseph W. Purman, III, DDS

General Dentistry

My dental career began 30 years ago, and since then, I have had the opportunity to create relationships with so many wonderful people. Each patient I meet is a unique individual and it is always my goal to treat clients with the same consideration that I would expect for my own family.

  • Bachelor of Science – University of Wisconsin
  • Doctorate of Dental Surgery – Marquette University

Continuing my education is a vital aspect of staying on the forefront of dental treatments and technology. I am always interested in finding new, more efficient, and more comfortable ways to give my patients the dental health they deserve.

I am a native of Milwaukee, Wisconsin, and have lived in Wayland for the past 20 years with my wife and our son and daughter. When I have free time I enjoy water and snow skiing, traveling, and reading. I am also active in high school and college rowing programs.

Catherine J. Moshirfar, DMD


I am passionate about educating my patients about the health of their mouth. I chose to specialize in periodontology because it was the perfect mix of microbiology, education, and artistry. I really enjoy the day-to-day interactions with my patients. I try to maintain a comfortable yet upbeat environment where the focus is always on quality patient care.

  • Doctorate of Dental Medicine – Tufts University School of Dental Medicine
  • Certificate in Periodontology – Tufts University School of Dental Medicine

Member of:

  • American Academy of Periodontology
  • Diplomate, American Board of Periodontology

In my time outside of our practice, I enjoy traveling and kayaking, and I am learning how to golf.

Yong Hur, DMD


Dr. Hur is currently assistant professor of Periodontology at Tufts University School of Dental Medicine. He is a Diplomate of the American Board of Periodontology and is a recipient of the research fellowship award sponsored by American Academy of Periodontology.

Dr. Hur is particularly active in the clinical research of guided bone regeneration and participates in the GHDP. He serves as a principal investigator (PI) / co-investigator (Co-I) for more than 10 projects related with periodontology.

Dr. Hur is also a published clinician:

Hur, Y., Bui, M. N., Griffin, T. J., & Ogata, Y. (2015). Modified Periosteal Releasing Incision for Flap Advancement: A Practical Technique for Tensionless Closure. Clinical Advances in Periodontics, 5(4), 229–234. doi:10.1902/cap.2014.140009

Hur, Y., Tsukiyama, T., Yoon, T.-H., & Griffin, T. J. (2010). Double Flap Incision Design for Guided Bone Regeneration: A Novel Technique and Clinical Considerations. Journal of periodontology, 81(6), 945–952. doi:10.1902/jop.2010.090685

Dr. Hur is a member, and peer-reviewer for the two main Journal of American Academy of periodontology: Journal of Periodontology and Clinical Advances in Periodontics . He is a member of the International Association of Dental Research (IADR).

Dr. Hur enjoys traveling with his lovely wife, Yumi who is also a periodontist.

Carol Lorente, DMD

Oral Surgeon

Education and Continuing Education

  • Northeastern University – B.A.,  Biology, magna cum laude
  • Massachusetts Institute of Technology – Ph.D., department of Nutrition and Food Science
  • Harvard School of Dental Medicine – D.M.D.
  • Massachusetts General Hospital – Oral & Maxillofacial Surgery residency

Professional Affiliations

  • Massachusetts General Hospital
  • Harvard School of Dental Medicine
  • Massachusetts Eye & Ear Infirmary
  • American Association of Oral & Maxillofacial Surgeons
  • American Dental Society
  • Harvard Odontological Society
  • American Association of Dental Research
  • Sigma Xi
  • Omicron Kappa Upsilon

Omar Salem, DMD


I have been practicing orthodontics since 1999, but have a lifetime of learning in my profession. My father is a retired orthodontist, and I loved joining him in his office to help organize patient study models and prepare supplies. I still meet people who were patients of his, and were influenced by his gentle nature and beautiful results. I strive every day to be the best orthodontist I can be for my patients, and to provide a warm and welcoming environment where they feel comfortable.

Education and Continuing Education

  • Doctorate of Dental Medicine – Tufts University
  • Orthodontic Specialty Certificate – State University of New York at Buffalo
  • Master of Science in Dentistry – State University of New York at Buffalo

Although my formal education is complete, I am always learning something new in the orthodontic field. My continuing education courses and seminars keep me up to date with the latest techniques and technology, which enables me to offer my patients the most advanced and dependable practices. Additionally, I have been involved in the education of future orthodontists, serving on the faculty at the Department of Orthodontics at Buffalo University until 2002, then at the Tufts University School of Dental Medicine, where I served as director of the Pre-doctoral Orthodontic Program until 2005.

Professional Affiliations

  • American Dental Association
  • Massachusetts Dental Society
  • American Association of Orthodontists
  • American Board of Orthodontics

I was born and raised in Damascus, Syria, and moved to the United States in 1996. I have been living in Canton since 2001 and love it! My wife Zeina and I have two boys who attend Canton public schools. After work, I enjoy hiking, soccer, landscaping, traveling with my family, watching the Red Sox and the Patriots, and spending time with my family.

Maryanne Knasas Irwin, DMD


By using state of the art technology, root canal therapy can often preserve a damaged tooth that would otherwise require extraction. I enjoy educating patients to have realistic expectations of what root canal therapy involves, while providing treatment that is skilled, compassionate, and pain free in a comfortable and relaxed environment.

  • Bachelor of Science in Biology – Boston College
  • Doctorate of Dental Medicine – Tufts University School of
  • Dental Medicine
  • General Practice Residency – Veterans Administration, West Palm Beach, FL
  • Specialty certificate in Endodontics – Tufts University School of Dental Medicine

Professional Affiliations

  • American Dental Association
  • Massachusetts Dental Society
  • American Association of Endodontists
  • Board Certified Diplomate – American Board of Endodontics

Outside the Office – I enjoy reading, running, and spending time with my husband and our two daughters.

Ryan S. Lee, DDS, MPH, MHA

Dentist, Dental Oncologist

Dr. Ryan is a dental oncologist and dental sleep medicine provider who is a full-time attending at New York University College of Dentistry. He focuses his expertise on the dental management of patients before, during, and after cancer experience (e.g., chemotherapy, radiation treatment, transplant, surgery), as well as associated complications (e.g., sleep apnea, lymphedema, trismus, osteonecrosis, radiation caries, mucositis, oral infections and snoring).Dr. Lee has joined the Great Hill Dental team in Boston, MA to provide his specialized dental oncology treatment and care.

Education and Memberships


  • 9/2012 – 6/2013 – Postdoctoral Research Fellowship, Dental Oncology Sloan-Kettering Institute, Memorial Sloan-Kettering Cancer Center
    New York, NY, USA
  • 7/2011 – 6/2012 – Postgraduate Certificate, Fellowship in Dental Oncology Memorial Sloan-Kettering Cancer Center, Department of Surgery, New York, NY, USA
  • 7/2010 – 6/2011 – Certificate, General Practice Residency (Hospital Dentistry) Mount Sinai Sch. of Medicine, Jersey City Med. Ctr., Dept. of Dentistry Jersey City, NJ, USA
  • 8/2006 – 6/2010 – Doctorate of Dental Surgery (D.D.S.), w/Honors, New York University, College of Dentistry, New York, NY, USA
  • 9/1999 – 8/2003 – Bachelor of Arts (B.A.), Economics, Northwestern University, College of Arts and Science, Evanston, IL, USA
  • 7/1995 – 6/1999 – High School Diploma, Academy for the Advancement of Science and Technology, Hackensack, NJ, USA

Academic Positions

  • 12/2012 – current Clinical Assistant Professor, Dept. of Oral and Maxillofacial Pathology, Radiology, and Medicine
    New York University, College of Dentistry, New York, NY, USA
  • 10/2012 – 7/2013 Research Fellow, Sloan-Kettering Institute (SKI) Department of Surgery, Dental Service Memorial Sloan-Kettering Cancer Center, New York, NY, USA

Membership and Professional Affiliations

  • 2014 – current International College of Oral Implantologists (ICOI) Fellowship-Eligible (FICOI), 2015
  • 2013 – current American Academy of Dental Sleep Medicine (AADSM) Fellowship-Eligible (FAADSM), 2015
  • 2013 – current Special Care Dentistry Association (SCDA)
    2012 – current American Academy of Oral Medicine (AAOM)
  • Fellowship-Eligible (FAAOM), 2015
  • Member, Oral Cancer Taskforce, 2012-current
  • 2010 – current American Dental Association (ADA)Participant, ADA Evidence-Based Dentistry Conf., Chicago, 7/2011
  • 2008 – current American Dental Education Association (ADEA)
  • National Delegate (Hospital-Based), 2012-2013
  • National Liaison, AADSAS Taskforce, 2008-2010
  • 2009 – current Academy of General Dentistry (AGD)

Aditi Bhatt, DMD

General Dentistry

Dr. Aditi strives for excellence in all she does, and you can rest assured her attention to detail does not waiver while you are in her care. Dr. Aditi is skilled at guiding anxious or apprehensive patients through their treatments and helping patients feel confident that their goal of achieving a healthy smile to last a lifetime can be realized with comfort and affordability. Dr. Aditi is committed to staying ahead of changes in dentistry and advancements in dental treatment. She is committed to providing her patients with the latest and best that dentistry has to offer. She does so by constantly challenging herself, attending hands-on courses, CE courses and various Study Clubs. Dr. Aditi concentrates on restorative dentistry, her special interest is cosmetic dentistry, including smile makeovers, and is a certified Invisalign provider. She is committed to developing great relationships with her patients, ensuring patient comfort, and educating patients so they understand their oral health conditions and treatment options.

Professional Affiliations:

  • ADA- American Dental Association
  • MDS- Massachusetts Dental Society
  • BDS- Boston District Society

She enjoys hiking, swimming, cooking, and spending quality time with her family.

Morgan Floyd, DMD

General Dentistry

Dr. Morgan Floyd received her doctorate of dental medicine from The University of Alabama School of Dentistry in Birmingham, Alabama. Dr. Floyd continued her training at Harvard School of Dental Medicine and The Cambridge Health Alliance, where she completed a General Practice Residency. Her residency focused on the team-based approach to dentistry, including the oral health provider as part of the overall healthcare team. Dr. Floyd has experience working with children, medically complex and special needs patients.

Dr. Floyd strives for the highest standards as a dental provider and enjoys connecting her patient’s smiles to their overall health. She believes that effective and honest communication helps to achieve the best outcomes for her patients. She is passionate about oral healthcare and feels honored to serve her community through her work.

Education and Continuing Education

  •  Bachelor of Science in Chemistry – Howard University
  • Doctor of Dental Medicine – University of Alabama at Birmingham
  • General Practice Residency – Harvard School of Dental Medicine and The Cambridge Health Alliance

Professional Affiliations

  • American Dental Association
  • Massachusetts Dental Society

Dr. Floyd is a classically trained ballet dancer and performed professionally as a member of the Alabama Ballet company prior to pursuing higher education. She continues to study dance as well as yoga and pilates.

Jose Colon, DMD


Dr. Jose Oscar Colon earned his Doctor of Medicine in Dentistry from the University of Puerto Rico School of Dentistry. His education continued at the Boston University School of Dental Medicine, where he received his Master of Science in Dentistry in Oral Biology and his Certificate of Advanced graduate studies in Periodontology. Dr. Colon was awarded as the Best Periodontist in Puerto Rico in the 2015 Dentist Choice Awards.

Professional Affiliations

  • American Academy of Periodontology
  • Colegio de Cirujanos Dentistas de PR
  • Academy of Osseointegration

Dr. Colon volunteers his time as a local and international speaker in areas of Periodontics and Implant Dentistry.

Nari Park, DMD

General Dentistry


Harvard School of Dental Medicine

  • Advanced Graduate Education in Periodontology
  • Master of Medical Sciences (MMSc) Candidate

Tufts University School of Dental Medicine

  • Doctor of Dental Medicine (DMD)

Case Western Reserve University

  • Master of Science

University of Michigan

  • Bachelor of Science

New Patients are Always Welcome at our Practice!

Please feel free to call us or email us if you have any questions or wish to book an appointment.

Great Hill Dental Boston

(617) 404-1516

1610 Tremont St. Boston
One Brigham Circle on the Green E Line
Boston, MA 02120


Monday: 7:30am – 7:00pm
Tuesday: 7:30am – 7:00pm
Wednesday: 7:30am – 7:00pm
Thursday: 7:30am – 7:00pm
Friday: 8:00am – 4:00pm
Saturday: 8:00am – 4:00pm
Sunday: Closed