http://news.bbc.co.uk/2/hi/health/4293574.stm
Blair 'powerless over dentists'
Tony Blair has admitted he is powerless to increase access to NHS dentistry.
The government is increasing training places by a quarter and introducing a new contract to improve access - only half the population is registered.
But in an interview on BBC Breakfast News, the prime minister said there was no way of forcing dentists to do NHS work instead of private.
More than a third of English dentists' work is carried out privately - up from about a tenth 15 years ago.
Mr Blair blamed the rise on a new contract introduced in 1990 which effectively increased workload without a rise in pay.
The rise in private work has meant that many people have struggled to find NHS dentists with queues being seen in some parts of the country when a new practice opens.
However, the large number of unregistered people will also include those who have decided not to register themselves.
Mr Blair said dentistry was the "most difficult aspect of the NHS".
"We can't turn the clock back, because I can't force dentists to come back into the NHS."
The admission comes six years after the prime minister pledged to give everyone access to NHS dentistry within two years.
Preventative work
The government is attempting to remedy the situation by introducing a new contract in April which allows dentists to spend more time on preventative work in a bid to get away from the "drill and fill" culture.
The number of training places have also expanded by 25% this year, although it will be five years before those dentists graduate.
Nigel Cater, of the charity British Dental Health Foundation, said he could not see the situation improving in the short-term.
"I don't think you will see a rush of dentists coming back to the NHS, although the new contract may stop them leaving, and the new training places are going to take a few years to make a difference."
And Lester Ellman, of the British Dental Association, said the new contract may "lead to more dentists going private".