International Student Dental Plans

How long it takes to be a dentist in the U.S.? What about Australia? And education is needed?
His intention of becoming a dentist, but I do not know how long it takes (either the U.S. or Australia) and what training is required. What are the middle classes? Y dental school and have few places, what kind of students tend to choose? International students are less fortunate?
U.S. 4 years Five years in Australia
Rick Kahn honored at USC International Restorative Dentistry Symposium