As a dentist having worked in both the United States and Canada, I support accepting CDAC accredited Canadiab colleges as equivalent to American counterparts.  The Canadian accredited schools are reputable, and graduate excellent hygientists, on a level playing field with American schools and hygienists. There is no real discrepancy between hygienists trained in the U.S. and Canada, therefore hygienists graduating from accredited Canadian colleges and passing US board exams should be allowed to practice in their respective states in the United States.