I spoke to an NHS Dentist, in Liskeard, recently, i was told that nothing announced by the Tories or anything in Labours manifesto will have them open up their waiting lists, which are over 4 years long, they also won't do more emergency treatment, not because they can't but because it just means the patient keeps coming back and it just ties up their dentists, they need to get that patient's teeth back up to scratch but the Govt wont pay for that, so they just end up just fire fighting.
I was told to ring them back in 5 years time and see if anything has changed.
I recently paid £860 for root canal, the same treatment would have seen the Dentist get around £320 from the NHS, thats the problem and sorry Mr Starmer, that will require you to stump up money.