Dentist in Great Neck, NY

Meet the Doctors

At North Shore Cosmetic and Implant Dentistry, we are dedicated to providing top-notch dental care services that prioritize both aesthetics and functionality. Our team of skilled and experienced dentists is committed to helping you achieve a beautiful and healthy smile.
Dr Kwag

MEET DR. Won S. Kwag (“Dr. Warren Kwag”)

Dr. Kwag is known for his caring nature and gentle touch, which make even the most nervous patients comfortable. Often, his patients would take a quick, power nap while under his treatment care!

His love for dentistry started early in his life. He grew up watching his father and uncle practice dentistry. Dr. Kwag often followed them on dental volunteer trips to help those in need, which influenced him to do the same. Dr. Kwag helps his patients in all areas of dentistry: from prevention to dental emergencies, from cosmetics veneers, crowns and bridges to more complex forms of dental implants, sinus lifts, gum lifts – all with a soft manner and kind nature. Dr. Kwag is passionate about providing exceptional care to his patients and ensuring they have a pain-free, positive experience that he always wanted to provide to his patients. He is also very good with treating young children, and often goes on an outreach to provide dental health education.


Dr. Kwag loves to learn! Anyone who knows him knows he is passionate about enhancing his education and scope of knowledge, both professionally and personally. He is constantly learning and staying up to date on all of the latest techniques and technologies dentistry has to offer.

Dr. Kwag earned his Bachelors of Science degree in Biology at SUNY Stony Brook, graduating with Cum Laude honors. Then, Dr. Kwag attended New York University College of Dentistry where he made his lifelong dream of becoming a dentist a reality. He consecutively completed a residency program in Queens where he received additional training in implantology and oral surgery. In his quest to provide outstanding, advanced dentistry through science, Dr. Kwag furthered his education with classes from the prestigious Kois Center in Seattle. Soon, he will be recognized as a Kois graduate. Dr. Kwag also completed rigorous implant courses from Hiossen Advanced Dental Implant Research and Education Center and Gangnam International Implant Academy.



  • American Dental Association
  • New York State Dental Association
  • Nassau County Dental Society
  • Academy of General Dentistry
  • American Academy of Clear Aligners
Dental Clinic


Born and raised in South Korea, Dr. Kwag is fluent in both Korean and English. Moving to New York in order to pursue his dream, he found a new love for traveling. Alongside his college sweetheart and wife, Janet, and his two beautiful children, who are his world, Dr. Kwag enjoys exploring different cities, activities and cuisines. When he’s not out with his family, he can be found playing golf, jogging or sleeping under a tree on a warm summer evening. Oh, he likes to sing soft pop as well.


Dr. Jonathan Richter is a skilled dual trained holistic periodontist (gum disease specialist), prosthodontist (an expert in restoring teeth), and an expert in implant dentistry. He is one of only a few in the tristate area. He received his degree at NYU School of Dental Medicine and studied three additional years at the University of Pennsylvania’s prestigious Periodontic/Prosthodontic Program, earning a degree in Periodontics, Periodontal Prosthesis, Fixed Prosthodontics, and Implantology.

As both an integrative periodontist and prosthodontist, Dr. Richter believes in a total preventive wellness approach. Unlike most practitioners, Dr. Richter believes that all measures should be taken to save the natural tooth. His conservative approach is able to save most teeth that other dentist would extract. As an integrative dentist, he uses a holistic “natural” approach to periodontics, general, cosmetic, restorative, and implant dentistry.

He follows the IAOMT protocol for the safe removal of mercury amalgam fillings. His office environment and practices are consistently reviewed and updated as needed to provide a safe, healthy space for his patients, especially those with multiple chemical sensitivities, chronic diseases, and environmental illnesses.


Dr. Richter is respected in his field of dentistry. He is sought out by many legal firms, seeking his professional opinion and testimony as a dental expert. He has appeared on all major local news station channels including CBS, NBC, FOX, and ABC. He also writes for Natural Awakening Long Island Magazine and other various print and news media articles.

He is also associated with various dental societies including:

  • The Academy of Periodontology
  • Academy of Osseointegration
  • Northeastern Society of Periodontology
  • Academy of General Dentistry
  • Holistic Dental Association
  • The Eco Dentistry Association
  • The American Academy for Oral Systemic Health
  • Alpha Omega International Dental Fraternity


As a distinguished member of the Academy of General Dentistry, he received the honor of Fellow in July of 1992. This honor is an indication of Dr. Richter’s dedication to continued dental education and inspiration to other dentists while stressing the importance of quality and personalized patient care.

In his spare time, he is involved with many humanitarian and educational efforts such as:

  • Vice chair for the American Friends of Hebrew University
  • Hadassah School of Dental Medicine founded by the Alpha Omega Fraternity
  • Committee member for the National Foundation for Ectodermal Dysplasia’s Halloween Bash for 10 years
  • Committee Member of the Shoot Hoops for Lymphoma events
  • Member of the Holocaust Survivor Oral Health Program