In the United Kingdom, the term "doctor" is typically used to refer to medical doctors who have earned a medical degree and are licensed to practice medicine. Dentists, on the other hand, have earned a dental degree and are licensed to practice dentistry. As such, dentists are not generally referred to as "doctors" in the UK. The correct term to address a dentist in the UK is "Mr.", "Ms.", or "Dr.", followed by their surname.
It is important to note that, in some cases, dentists may hold a medical degree in addition to their dental degree. In such cases, they may choose to use the title "Dr." However, this is not the norm, and the vast majority of dentists in the UK do not use the title "Dr."