Robert Kulacz, DDS received his dental degree from New York University College of Dentistry, and he received post-graduate training in implant surgery and implant restoration sponsored by Brookdale Hospital in Brooklyn N.Y. He abandoned much of his traditional dental practice after learning of the risks of some of the dental procedures he was performing. His first book, The Roots of Disease, with co-author Dr. Tom Levy was published in 2002. It introduced many of the concepts that The Toxic Tooth now greatly expands upon.