There are a number of factors that shape your rebate amount, and contrary to what your fund may tell you, your dentist is not the issue.
For example, from March 2012 to March 2017, average dental fees per service only rose by 3%, with dental fees overall just keeping pace with the Consumer Price Index; by way of contrast, while the average rebate fees paid out rose 4%, it was dwarfed by a staggering increase in premiums of 38%.
You are, in other words, considerably worse off and it’s not the doing of your dentist, who has effectively capped their fee increases well below those of premium increases by your fund.