Dr. Ricardo Muñoz isn't thrilled about the latest TikTok challenge.

Muñoz, a dentist, said he's concerned about a new TikTok challenge that encourages people to file their teeth.

"It goes under the list of: I can't believe I have to say this, but that's dangerous, what they're doing," Muñoz said, adding later: "It's also scary to think that it's something that they're trying to make popular on social media."

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