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Island Endodontics

Comfortable, Courteous & Highly Competent Care

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      I grew up in Commack, NY and graduated Commack High School in 1991.  I then attended Penn State University and graduated in 1995.  In 2000, I became a graduate at the University of Pittsburgh Dental School and went on to complete my Post Graduate Endo training in 2003 at Stony Brook University.  I’ve been in private practice ever since, here in Wantagh, NY, and work alongside my brother, Dr. Todd Pobiner.


I am a member of the American Association of Endodontists (AAE), NYS Dental Association, Nassau County Dental Society and also the Suffolk County Dental Society.


I believe that gentle dentistry is a vital part of being a good Endodontist.  My patients usually don’t come to me because they feel good, but rather the opposite.  It’s my job to fix the problem while keeping them in the least amount of discomfort possible and making them feel at ease.  My patients’ comfort and wellbeing is my #1 priority, so I invite you to visit our office and see the care we offer, first hand.


When I am not working, I enjoy fishing, the outdoors and traveling.  

Dr. Shawn Pobiner

     I grew up in Commack, New York, where I graduated in 1996 from Commack High School. I then moved to Pennsylvania, Hawaii and Florida for the next 8 years to complete my undergraduate college and dental school education. I am grateful for the opportunity this gave me to see other parts of the country. In 2005, I completed an advanced hospital residency at Nassau University Medical Center, after which I went on to Stony Brook University to receive my Advanced Education in Endodontics degree.


Being a fourth generation dentist, I was very excited to join my brother Shawn in practice in 2007. To some people outside the profession, dentistry may seem dull, but anyone who works in the field will quickly tell you otherwise. Everyday presents a new and different challenge. Encountering various personalities, individualized personal circumstances and a multitude of different aspects helps you determine what is best for the patient and makes everyday unique and exciting. I thrive on that excitement and consistent development as an endodontist.


I make it a priority to keep abreast of all the latest technology in Endodontics. With that knowledge, I have committed myself to lifelong learning and advanced training. I continue to attend seminars and educational meetings all over the country. Being a member of the American Association of Endodontics, New York State Dental Association, and Nassau County Dental Society has provided me with great opportunities for advanced education all of which benefit our patients.


When I am not at the office I do enjoy a personal life. Living in Manhattan has really broadened my cultural horizons. I am both an avid runner and cyclist, but my real passion is the practice of Bikram Yoga. I have been a devoted yogi since 2010, practicing at studios all across the country. Anyone who has experienced it first hand will tell you it’s a great way to reduce stress and stay healthy while improving the overall quality of your life.

Dr. Todd Pobiner


Dr. Geraldine Navarrete graduated from New York University in 2003. She continued her education at Tufts University School of Dental Medicine where she received her degree of Doctor of Dental Medicine. She then continued her training at Long Island Jewish Medical Center where she became chief resident of her division. She practiced general dentistry for one year in private practice along with providing dentistry to the homebound. She then advanced her education by attending the University of Tennessee Health and Science Center receiving her training in endodontics and her Masters of Dental Science degree.


Dr. Geraldine Navarrete’s training included the use of surgical microscopy, multiple forms of rotary instrumentation, microscopic photography and the use of cone beam computed tomography (CBCT). She is very thorough and determined to provide the highest standard of care. She is compassionate to her patients’ needs and strives to provide only the best dental care. Dr. Geraldine Navarrete is kind and caring and always makes sure her patients are comfortable while receiving treatment.


Dr. Geraldine Navarrete regularly attends continuing education courses to keep up to date with the newest advances in dentistry. She is member of many associations and study clubs, including the American Association of Endodontics, American Dental Association, NYS Dental Association, and Nassau County Dental Society and Suffolk County Dental Society.


In her free time, she enjoys spending time with her husband, travelling and exploring the outdoors.

Dr. Geraldine Navarrete, DMD, MDS

Dr. Lentz graduated from Pennsylvania State University with a Bachelor of Science degree in 2009. He then continued his academic pursuits at the University of Pittsburgh School of Dental Medicine, where he graduated in 2013. The following year Dr. Lentz advanced his dental training at the Pittsburgh VA Healthcare System as a general practice resident. After one year in private practice in Pittsburgh,

Dr. Lentz realized his true passion was for endodontics. He then returned to the University of Pittsburgh School of Dental Medicine where he received his specialty certification in endodontics in 2017. Dr. Lentz’s extensive endodontic training includes surgical microscopy, rotary instrumentation, CBCT and regenerative endodontics. Dr. Lentz also performed extensive studies on the influence of access on fracture strength of teeth. Dr. Lentz is a member of the American Association of Endodontists, American Dental Association, New York State Dental Association and Suffolk County Dental Society. With all these accolades, we at Island Endodontics have full confidence that Dr. Lentz will provide the highest level of comprehensive care to all of your patients. As a new member of our team, he will be splitting his time between both Wantagh and Smithtown locations to provide greater accessibility. To ease Dr. Lentz’s transition into our practice, he will also accept some insurances at the Wantagh and Smithtown offices. Dr. Lentz’s enthusiasm about endodontics inspires all of us here at Island Endodontics as we look forward to welcoming him into our practice.

Dr. Mark Lentz