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AboutVital Dental of Bayside

Vital Dental of Bayside is a Bayside based family dentist practice that treats patients of all ages. We are committed to delivering the highest quality dental care and do so using advanced dental equipment. We are a cosmetic dentist that offers services like checkups, teeth cleaning, crowns, veneers and more.

We also perform emergency dentist services that include bonding, root canals, and bridges. As a local dentist, we create lifelong relationships with our patients and their families and work to ensure that they receive treatments in a comfortable and relaxed environment. Dr. Mavromatis and our team invite you to schedule an appointment by calling 718-416-6424 and experience why our patients think Vital Dental of Bayside is the best dentist in Bayside.

Dr. Yannis Koroneos

Dr. Koroneos earned a bachelors degree in International Relations from Boston University. He subsequently earned his DMD at Tufts University School of Dental Medicine.

While at Tufts, Dr. Koroneos was president of a class of 200 students and served as the bridge between the students and the faculty. The American College of Dentists awarded him the "Outstanding Student Leader" award and he also received an endowed prize fund for leadership.

Dr. Koroneos prides himself on clinical practice backed by evidence based dentistry. He is a member of the Robert Andrews Research Honor Society and was a Deans Research Scholar at Tufts, where he focused on implant survival and complications. He has presented his work at multiple International and American Association for Dental Research meetings. Dr. Koroneos also received the Dr. Harold Berk Endowed Prize Fund for Excellence in Research.

After graduating from Tufts Dr. Koroneos went on to complete a general practice residency at Bellevue Hospital Center, learning advanced dental and surgical procedures in a fast paced hospital setting. Dr. Koroneos is committed to providing the highest standard of care using the most up to date techniques and methods. He has completed multiple continuing education courses focusing on implants, dental occlusion, cosmetic treatments, and sleep apnea.

In his free time, Dr. Koroneos loves to cook and frequents jazz shows and other live music performances in New York City.

Dr Spiro Balaouras

Dr. Spiro Balaouras, DDS

Dr. Spiro Balaouras received his Bachelor’s Degree in Biology in 1988 from New York University’s Washington Square and University College, and his D.D.S. Degree in 1991 from New York University David B. Kriser Dental Center College of Dentistry. He combined his undergraduate and graduate studies at New York University by attending the University’s B.A. / D.D.S. Joint Degree Program (Seven Year Program). At the College of Dentistry, Dr. Balaouras was very active in student government.

In 1992, Dr. Balaouras completed his postdoctoral study at The New York Hospital-Cornell Medical Center’s Department of Oral, Maxillofacial and Dental Surgery (General Practice Residency), and for several years served as Assistant Attending Dentist within that department. In an effort to provide dental care to New York City’s youth less likely to seek care, Dr. Balaouras worked for several years for The Children’s Aid Society Community School (I.S. 218) in Washington Heights. Dr. Balaouras began his career in private practice in Dr. Mavromatis’ office, originally located in Astoria, New York. Prior to rejoining her practice at Vital Dental of Bayside, Dr. Balaouras maintained a private practice in midtown Manhattan for over 25 years. Dr. Balaouras is a current member of the following organizations: American Dental Association, New York State Dental Association and New York County Dental Society.

Dr. Balaouras was born in a small town on Greece’s mainland, attended elementary school in Athens and often visits Greece with his family. He reads, writes and speaks Greek fluently.

Dr Vasiliki Mavromatis

Dr. Vasiliki Mavromatis-Christopher D.D.S.

Dr. Vasiliki Mavromatis graduated from New York University, College of Dentistry in the top ten percent of her class. During her residency at the VA Hospital in Manhattan and Bellevue Hospital of Manhattan, she specialized in general anesthesia. After graduating she became an instructor at New York College of Dentistry, Emergency Medicine Department. Dr. Mavromatis has advanced training in implants, aesthetic dentistry, Invisalign, Cerec, and has participated in studies at the Dawson Academy, Engel Institute and Kois Center for Continuous Education. She continuously integrates cutting edge technological advances into her practice in order to best care for her patients.

Education & Training:

Dental School:

New York University College of Dentistry, 1985


Bellevue Hospital

Veterans Administration Hospital Manhattan

Awards & Accomplishments:

  • America’s Top Dentist 2014-2022
  • Best of Bayside 2022
  • Trademark Women of Distinction 2016
  • Dawson Academy Alumnus
  • Certified Invisalign Provider
  • Certified through Advanced Implant Programs




Margarita Kokolis, Patient Coordinator

Margarita Kokolis

Patient Coordinator

Margarita joined our team with over 15 years of customer service and management experience. She has worked in the dental field for the last 3 years. Margarita is passionate about making sure our patients receive quality care, service and attention from our office. She helps our patients understand all aspects of their dental treatment. She makes sure from start to finish the patient is happy and satisfied, leaving with a bright healthy smile. We are very blessed to have Margarita be part of our team.

Lori Malandrakis, RDH

Lori Malandrakis


Lori earned her degree in dental hygiene from New York University College of Dentistry. She graduated first in her class for both her Associate’s and Bachelor’s degree. Lori has been with the Vital Dental family since 2007. Patients find her compassionate, empathetic, and gentle. Her attention to detail and enthusiasm to maintain a high standard of care, as well as her dedication to learning the latest knowledge in dental research and technology, are truly appreciated by her patients and the dental team.