He received his postgraduate periodontal training from the Eastman Dental Center in Rochester , New York , completing the program in 1980 and receiving a Masters ' degree from the University of Rochester the following year .
Greenstein graduated from New York University College of Dentistry in 1972 .
Greenstein received Greenstein 's postgraduate periodontal training from the Eastman Dental Center in Rochester , New York , completing the program in 1980 and receiving a Masters ' degree from the University of Rochester the following year .
Greenstein graduated from New York University College of Dentistry in 1972 .