teeth teeth

Surface stains from things like coffee, tea, tobacco and red wine can be lightened with routine brushing, flossing and professional cleaning in the dental office. But deeper stains that come with age and damage to the tooth require bleaching agents or veneers. Katherine Streeter for NPR hide caption

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Katherine Streeter for NPR

Navigating The 'Aisle Of Confusion' To Whiten Your Teeth

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The MD Brush toothbrush forces users to hold it at the optimal angle relative to their gums. Shuyao Chen/NPR hide caption

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Shuyao Chen/NPR

Brush Yourself Off And Try Again: An Invention Story

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Hygienist Beth Rowan cleans the teeth of Lindsay Klecker, 31, who has cerebral palsy and a seizure disorder. Rowan works at the Marshfield Clinic in Chippewa Falls, Wis. Alison Kodjak/NPR hide caption

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Alison Kodjak/NPR

Getting Dental Care Can Be A Challenge For People With Disabilities

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A box of 3-D models 24-year-old student Amos Dudley made of his teeth. The model labeled "3" rests on a 3-D-printed tray Dudley made to make impressions of his teeth with a putty-like material. Also in the box are a clear plastic aligner and other 3-D models used to make more aligners, each one pushing the problematic teeth further into place. Jon Kalish for NPR hide caption

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Jon Kalish for NPR

New Jersey Student Uses 3-D Printer For DIY Dental Work

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Say aaaaaah! Dental caries and other signs of oral disease are plain to see in the upper teeth of this hunter-gatherer, between 14,000 and 15,000 years old. The findings challenge the idea that the original paleo diet was inherently healthy, says paleo-anthropologist Louise Humphrey. It all depended, she says, on what wild foods were available. Courtesy of Isabelle De Groote hide caption

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Courtesy of Isabelle De Groote

Looks Like The Paleo Diet Wasn't Always So Hot For Ancient Teeth

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Anthropologists say early humans who hunted and gathered had longer jaws to hold all those teeth. iStockphoto.com hide caption

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iStockphoto.com