About Knickerbocker Oral and Facial Surgery Board Certified Oral & Maxillofacial Surgeon, Doron Ringler, DMD, MD, practices a full scope of oral and maxillofacial surgery with expertise ranging from corrective jaw surgery to dental implants and wisdom tooth removal. He can also diagnose and treat facial pain, facial injuries and TMJ disorders, and perform a full range of dental implant and bone grafting procedures.