My Dad became a dentist when I was about 8 so I have gotten free dental care my whole life. They provide stellar oral health services.
Wow!  That is awesome!  Aren't dentists basically doctors?
Basically.  They are also known as oral surgeons and then they just specialize in dentistry along with the diagnosis, prevention, and treatment of oral problems.
Is dentistry a hard profession?
I think it is.  You are just responsible for regular maintenance of teeth but also other parts of the face near it like the jaw and supporting structures.  People depend on you a lot.