ADA National fee surveys show that dentists’ fees over the 17 year period from 1996-2012 have increased on average by less than 5% annually.
You should ask what your health fund average premium increases have been over the same period.
The Federal Government has been subsidising health fund premiums by 30%. Whilst this has recently been reviewed there is  still substantial subsidy on offer.
You should ask how much your health fund’s dental rebates have gone up over the same period.
The lack of increased dental rebates explains the increasing gap between fee and rebate. This has not been caused by your dentist