Information about NHS dental care is "confusing and inaccurate", a consumer watchdog has found.
Healthwatch England said some are travelling up to 40 miles for free treatment, while others end up paying for private treatment after a fruitless search.
The watchdog also warned that some NHS dentists are performing more basic treatments over more complicated, but potentially more beneficial, procedures, such as tooth extractions rather than fillings.
The situation is "simply not acceptable", the national organisation's chairwoman, Anna Bradley, said.
However, NHS England's chief dental officer, Dr Barry Cockcroft, said 93% of people who tried to get a health service dental appointment in the last two years were successful.
More top news
The shocking video of Laquan McDonald being killed brings the debate about racism in the US criminal justice system centre stage once more.
A video of a white police officer shooting dead a black teenager has been released by authorities in Chicago.
Cold in the wind