There are different classes you can take in the UK; therefore, if this is a field you are interested in, you should start getting information regarding the requirements for such classes and how you can get admitted to such a discipline. Remember that learning to become a dentist can be pretty hard; it can get overwhelming, as this is not about attending a class and getting a job. That is about a lifetime of learning as all sorts of new things and technologies appear, and you need to be up-to-date with everything new.