Dentist Waltham | Emergency Dentist Waltham | Meet the Doctors

Get to Know Your Dentist in Waltham

Kirsten Lui, DMD


Dr. Lui brings a combination of compassion and professionalism that helps her provide excellent and comprehensive dental care. She has been trained in the newest advancements in restorative and cosmetic dentistry, oral surgery and periodontics enabling her to create healthy, natural-looking smiles for her patients.


Dr. Lui is fluent in Cantonese Chinese.  Dr. Lui is a graduate of Tufts University School of Dental Medicine. During dental school, Dr. Lui volunteered with Project Bridge to provide dental care for at-risk and homeless youth aged 14-24 and participated in a month-long externship working at the Salem Family Health Centre. Prior to moving to Massachusetts, she attended the University of Windsor (Ontario, Canada) and received her Bachelors of Science with Thesis in Biochemistry.


Dr. Lui is a member of several professional organizations, including the American Dental Association, Massachusetts Dental Society and The Academy of General Dentistry.  In addition to caring for patients, Dr. Lui enjoys spending time with family and friends, traveling, cooking, yoga and snowboarding.




Gregory Stephanos, DDS


Dr. Gregory Stephanos grew up in the Boston, Massachusetts area and moved to Houston before attending college. He was selected to attend the University Scholars Honors Program at Baylor University, where he earned a Bachelor of Arts degree in 2010 and presented an honors thesis on the association between stroke and periodontal disease. In 2015 Dr. Stephanos earned his D.D.S. degree from the University of Texas School of Dentistry at Houston. He is most passionate about delivering the highest possible quality of care to our patients, and endeavors to treat every patient like a family member.

Dr. Stephanos worked in private practice in the Houston area for two years in a comprehensive general dentistry practice focusing on large restorative cases and sedation. He attended study clubs through the prestigious Spear Institute to increase the level of care he was able to provide patients. Spear teaches a multi-disciplinary approach that integrates the different specialties within dentistry to create the ideal overall treatment plan for each patient. Dr. Stephanos is interested in the surgical and reconstructive areas of dentistry, and in order to provide optimal patient care, he elected to seek more formal education. Dr. Stephanos attended the Advanced Education in General Dentistry [AEGD] residency program at the University of Oklahoma from 2017-2018, which focuses on implant surgery and restorations, and major restorative treatment planning. This experience allowed Dr. Stephanos to provide patients a full range of treatment options to address their dental needs, from minor cosmetic enhancements all the way to major implant-supported reconstructions. Dr. Stephanos is very excited to return home to the greater Boston area and share his passion for dentistry and commitment to excellence with his patients.
In addition to dentistry, Greg is passionate about alpine skiing, landscape photography, martial arts, and his rescued dog, Simba.