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1 .This is Scientific American 60-Second Health. I'm Dina Fine Maron. Got a minute?
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2 .Ouch! About a quarter of all school-age kids will break or otherwise damage a tooth.
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3 .Adults have their share of cracked chompers too.
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4 .But what if fixing a busted bicuspid was as easy as zapping it with a laser?
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5 .Preliminary work with young rats has moved dentistry a small step in that direction.
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6 .A new study finds that shining a low-power laser on damaged rat teeth activates molecular growth factors already present in the tissue.
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7 .These growth factors cue stem cells to generate dentin, the bone-like substance that teeth are mostly made of.
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8 .Researchers also found that when mice were missing those growth factors,
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9 .or when the factors were blocked from working, the stem cells would not regenerate dentin when exposed to laser light.
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10 .That finding confirms the important role these signaling pathways play in dental development.
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11 .The study, led by David Mooney at Harvard's Wyss Institute, is in the journal Science Translational Medicine.
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12 .Could a light-based treatment for cavities and chipped teeth eventually be in the offing for people?
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13 .Researchers plan to investigate that possibility for human teeth, both baby and adult.
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14 .But until then, chew carefully.
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15 .And don't lead with your chin.
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16 .Thanks for the minute, for Scientific American 60-Second Health. I'm Dina Fine Maron.
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