Haha yea that's it, the "right people". Although I must say it is quite common for dentists/specialists who work at universities but are not allowed to practice dentistry in Australia, due to them obviously not passing ADC(Australian Dental Council) exams. So they usuallly have a restriction clause in their registration with AHPRA, saying something along the lines of they are only allowed to work as dentist/specialist in universities. And there are goods and bads. Some of them are excellent clinicians, and some of them....not so much lol....had a few as supervisors when I was going through my final year of dental school.
When you say resit the entrance exam, I am assuming you're talking about the ADC? Because that one I think you can sit it as many times as you want, but I may be wrong. But what a lot of overseas dentists do is, they work as DA in dental practices, while studying for their ADC. A lot of them do fail multiple times as it is not easy