Our Doctors

New York Endodontist 9 Our Doctors
Dr. Scott Resnick


Dr. Resnick was born and raised in Queens New York. He graduated Queens College and then went to Tufts University School of Dental Medicine. While attending Tufts, he also went to Harvard University Extension School, where he received a Graduate Certificate in Business. He then went to New York University where he received a Postgraduate Degree in Endodontics. He started practicing in 1988. Shortly after graduating he began teaching at Mount Sinai Hospital. In 1991, he became Chief of Endodontics at the hospital, a position he held for 23 years. Dr. Zicarelli joined him in 1991. They are now joined by, Dr. Linenberg, Dr. Donelson Dr. Todd and Dr. Boyd. We recently moved to our new location. They pride themselves on using the most sophisticated techniques, equipment and materials and they constantly strive towards excellence. He has a wife and three daughters. He enjoys cycling, running, swimming, yoga and, of course, spending time with his family.

Dr. Thomas Zicarelli


Thomas J. Zicarelli, DDS, is a graduate of Villanova University and the New York University College of Dentistry, where he completed his DDS degree and specialty certificate in Endodontics. Dr. Zicarelli served as Clinical Associate Professor in the Department of Postgraduate Endodontics from 1989 through 1999. It was during his specialty training that he met Dr. Scott Resnick, and together they founded New York City Endodontics in 1991. Over the years, they have expanded the practice to include several associates. Dr. Zicarelli is a member of the American Dental Association, the American Association of Endodontics, the New York Dental Forum and the First district Dental Society of New York, to mention a few. Dr. Zicarelli is married and has two children. He enjoys hiking, skiing, mountain and road cycling, ice climbing, gardening and model railroading.

Dr. Courtney Linenberg


Dr. Courtney Linenberg is originally from Michigan, and attended the University of Michigan where she earned her BS in Biology. She moved to New York and received her DDS from NYU’s College of Dentistry. She then completed a General Practice Residency at Mount Sinai Hospital. Dr. Linenberg went on to Boston University’s Goldman School of Dental Medicine for her Endodontic residency after which she married and moved back to New York. Since 2009 she has been with NYC Endodontics. She was also on the faculty at NYU College of Dentistry and has participated in their Global Outreach Program, providing dental care to populations in need in Maine, Mexico and Tanzania. Dr. Linenberg and her husband have two kids, Joey and Alexis, who can be found zooming around the Upper West Side on their scooters.

Dr. Jennifer Donelson


Dr. Jennifer Donelson originally comes from Colorado, where she attended Colorado College and earned her Bachelor of Science degree in Neuroscience. She traveled to Boston and attended the Tufts School of Dental Medicine for her DMD degree. She then completed an Advanced Education in General Dentistry at Lutheran Medical Center. She followed up with additional training at the same medical center to complete her Endodontic residency. Jennifer is an avid surfer travelling to Puerto Rico, Costa Rica, and Nicaragua to name a few. When the waves are flat, you might find her snowboarding in Japan or Colorado in her free time.

Dr. Randolph Todd


Dr. Randolph Todd is a technology inspired Diplomate of the American Board of Endodontics who began his academic dental career at Tufts University School of Dental Medicine in Boston, Massachusetts. During this training he had an oral surgical externship at Rambam Medical Center in Haifa, Israel; Prosthetic externship at Hadassah School of Dental Medicine in Jerusalem, Israel and a General Practice externship at the US Coast Guard Station in Boston, Massachusetts. Upon completion of dental school, he continued his education at a General Practice Residency. North Shore University Hospital / LIJ in New York and pursued his Endodontic specialty training at New York University College of Dentistry (NYUCD). Over the past thirty-eight years Dr. Todd has maintained an exclusive private Endodontic specialty practice in NYC and educated countless students at various institutions including SUNY Stony Brook College of Dentistry (Clinical Assistant Professor), NYUCD and NSUH/LIJ. He is a Past-President of the College of Diplomates of the American Board of Endodontics and when a member of the Board of Directors was the Director of the Board Review Course. Dr. Todd has been a National Lecturer for Carestream Dental and authored several articles about Cone Beam Computed Technology. He has been a member of the Scientific Review Board of the Journal of Endodontics for the past 12 years and has reviewed over 90 articles. Dr. Todd has been awarded the ADA Certificate for International Volunteer Service for his participation in an international humanitarian dental care program in Madagascar and the Caribbean.

Dr. Christina Boyd


Dr. Christina Boyd is a board certified endodontist committed to providing the highest quality care to patients in a safe and comfortable environment. She earned her Doctorate in Dental Surgery from New York University College of Dentistry where she received multiple academic and clinical awards in Endodontics, leadership and advancement of dentistry, occlusion, and oral comprehensive care. During her dental school training, Dr. Boyd published an article in the Journal of Cancer Education on research to identify barriers to oral cancer screenings by dentists. Dr. Boyd then completed a two year post-graduate residency in Endodontics at New York University College of Dentistry. She has also participated in numerous clinical outreaches here in the United States and globally to increase access to dental care for those in underserved communities. Her deep commitment and dedication to the profession was acknowledged when she was welcomed as a Diplomate of the American Board of Endodontics. She attends local study clubs and national scientific meetings to remain active in her field and to stay current on the latest research, techniques, and technology. Dr. Boyd is a member of the American Association of Endodontists, American Dental Association, and the New York State Dental Association.

Dr. Julianna Bair


Dr. Julianna Bair grew up in Livingston, New Jersey and attended Rutgers University in New Brunswick, NJ where she earned her Bachelor of Science in Molecular Biology/Biochemistry and Spanish Literature. She received her DMD degree from Tufts University School of Dental Medicine in Boston. She then went on to complete a general practice residency at Columbia University/New York Presbyterian Hospital and a pediatric dental residency program at Interfaith Medical Center in Brooklyn. Dr. Bair is a board certified pediatric dentist. As a pediatric specialist, she saw a need for herself to learn more about endodontics. This passion led her to complete her final residency program in endodontics at Einstein Medical Center in Philadelphia. As a dual specialist in an endodontic practice, Dr. Bair treats children and adults, delivering the highest quality care, with that extra gentle touch of a pediatric dentist. In her free time, she enjoys jogging, skiing, traveling the world, and spending time with family and friends. She is also fluent in Mandarin.

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