The only fun thing for me about going to the dentist when I was young, was he would give me a bead of mercury in a small vial to take home and play with. I know, right? That was the good old days.
My Mom had a gold tooth. I had asked her about it when I was young because I had never seen anyone else with a gold tooth, but I never thought to ask her later in life how that came about - it was just always a part of her appearance.
In the following periodicals, look for list of contributors, obituaries, and graduates.
You might enjoy reading Jana Last's tales of her Traveling Dentist ancestor.
Check local libraries for registers of dentists, like these ones at Trove, Australia.
Women in Dentistry
The Dentists register, UK
Annual report of the Montana Sate Board of Dental Examiners to the Governor
Illinois Board of Dental Examiners
Canada Journal of Dental Science
Biographies of the founders, prominent early members and ex-presidents of the Missouri Sate Dental Association, 1909
Who's Who in Dentistry - United States and Canada, 1916
Journal of the North Carolina Dental Society, 1965
Registered dentists and dental hygienists in Pennsylvania
The Dental Times
Registered dentists, unlicensed assistants and dental hygienists, CT
Beecher's manual and dental directory of the United States, 1884
The Dental Columbian
Transactions of the British Society for the Study of Orthodontics
Pacific Coast Dentist