
Dr. Sydney Onos, DMD
Dr. Sydney Onos grew up in South Portland, Maine, and began her dental journey at the University of New England (UNE), where she studied medical biology and nutrition. She went on to earn her doctorate from UNE College of Dental Medicine.
Following dental school, Dr. Onos furthered her training by completing a residency in Advanced Education in General Dentistry (AEGD) through NYU Langone Hospitals at Codman Square Health Center in Dorchester, MA. There, she gained extensive experience providing comprehensive dental care in a community health setting and developed a passion for helping patients of all ages feel comfortable and confident in the dental chair.
Outside of dentistry, Dr. Onos enjoys spending time with family, exploring the outdoors through biking, running, or hiking, and relaxing with a good show. She is also an animal lover and always enjoys meeting new furry friends.
Dr. Onos looks forward to getting to know you and joining the Harte Dental Care team to help you achieve a healthy, happy smile!

From the receptionist to Dr. Harte, everyone was welcoming. By far, it was the best dental experience I've had in a very long time. They were thorough and took time to explain each step. The offices are very clean and updated. I look forward to continuing my dental care with Dr. Harte and her incredible staff. Thank you all for a great experience.
-Suzanne