There is a "myth" that you need to be registered with a dentist "in the same way that you are registered with a GP," the head of a consumer watchdog told Good Morning Britain, "but you don't."
This pervasive myth has allowed some dental practices to "deregister" patients, Anna Bradley, Chair of Healthwatch England, said, something that cannot technically happen.
Of the examples of people being "struck off" from their dental practice for missing a single appointment that the watchdog have found, in one case someone was deregistered for taking a relative for cancer care.
More top news
The returns of Benedict Cumberbatch's detective and the X Factor judge were among 2014's most tweeted TV moments in a billion conversations.
A family has issued an appeal to help find their missing pet turkey - in case he gets gobbled up as someone's Christmas dinner.
The winner of X-Factor Ben Haenow has revealed how keen he is to have the Christmas number one.