Dentists do have the right to refuse to see particular patients, NHS England's Chief Dental Officer told Good Morning Britain.
Dr Barry Cockcroft said "there's no absolute right to see a specific dentist."
Consumer watchdog Healthwatch have found examples of patients getting "deregistered" from their dental practices for missing single appointments, in one case to take a relative for cancer treatment.
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Mr Kim has made two recent visits to China.
The study looked at the development of 422 children over the course of eight years.
The president said they will come into force if China refuses to change its practices.