It's not. There's a few people that haven't done any work experience at all, and I didn't do that much either whereas there are people who have worked as dental hygienists for 5+ years in the course. They don't look at what dental work exp you've got and pick the people who've got the most - from what I can gather, CSU wants a balanced/mixed group of people and they aren't going to pick their cohort solely out of the Oral Health kids etc.Maybe it is mostly the amount of work experience you do, how much did you do?
Are you applying at any other unis?
Don't get down on yourselves guys, remember that there are heaps of applicants. Traditionally it's been 1000+ but I wouldn't be surprised if it was 1200-1300+ this year. Just keep trying and you will get in somewhere eventually. Good luck.