Complex sentence: Greenstein graduated from New York University College of Dentistry in 1972 and 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.
Split into simpler sentences: Greenstein graduated from New York University College of Dentistry in 1972. 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.