GPR is further training for one or two years in hospital-based dentistry mainly. AEGD is learning more advanced procedures for general dentists. Penn graduates do these programs typically because: 1. they may not feel ready to practice dentistry in the "real world" upon graduation, 2. completing a GPR or AEGD give you a higher chance to get into a speciality program, or 3. They want to practice in New York, Delaware, or California which require that dentists completed these training programs in order to get licensed.