My guest is Dr. Elise Sarvas, a pediatric dentist at the University of Minnesota School of Dentistry. First, she discusses her study about access to dental care issues for many kids in the foster system.

"We wanted to see how these kids view their oral health," says Sarvas. "So we asked them questions, such as do you like your teeth? Have you ever had any dental pain? Is it hard to get to a dentist? And we found it was hard for them to get to a dentist even when they were having a lot of dental pain."

Then Sarvas answers common questions about everyday dental care. How many times a day should you brush? Do I need an electric tooth brush? And who should take antibiotics before a trip to the dentist? Plus she weighs in on what she refers to as "Flossgate." Do you really need to floss?

Her study is published in The Journal of the American Dental Association.

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