It's the cost. £200 ($400) plus additional expenses. That's outrageous, especially when we pay up the ass in taxes for the NHS and they still make us pay that much.
That's two weeks wages at least being spent all on the dentist
A 19 year old in full-time education really shouldn't have to pay the full amount. Lots of other people get huge reductions, including ****ing immigrants (in fact those leeches get it for free, out of my taxes), but hard working students have to pay in full.