Cavity finding pen
August 29, 2019 6:02 PM Subscribe
My former dentist had a little device that made a humming noise as it touched my teeth. When it touched a tooth with the beginning of a cavity (I guess an area of demineralization?)... the pitch of the hum would change. What's that machine called? Secondary question- if I do have areas of demineralization, is it possible to fix them without drilling so they don't become cavities?