Don't assume you're entitled! Certain groups don't have to pay NHS dental treatment charges. You should always check with your dentist whether your treatment is private or NHS. If you're entitled to free NHS treatment and the treatment you receive is a mixture of NHS and private, you will still have to pay for the private treatment.
This form can be used to claim back the cost of NHS dental treatment for people on a low income who may be entitled to a refund.
A five minute guide to healthy teeth for the under fives.