I want to be a dentist.What do I need do?
also known as a dental surgeon, is a surgeon who specializes in dentistry, the diagnosis, prevention, and treatment of diseases 
Do you know any renowned dentist!
Yeah! How about Frank Abbott (September 5, 1836 – April 20, 1897) was president of the American Dental Association (1888), president of the National Association of Dental Faculties (1895), a renowned dentist, an author on dental subjects.
Who also was the first dentist in the world?
Same Frank Abbott (September 5, 1836 – April 20, 1897) he reformed the practice
I have a took ache and cavity,how can a dentist be helpful!
I'll suggest you visit a dental assistants, dental hygienists, dental technicians, and in some states, dental therapist
That could be helpful indeed,thanks for the info!
Your welcome! Be sure to stick to the guideline suggested