New magnetic nanobots can seal sensitive teeth for good

Chetana Belagere

Aug 12, 2025

Health

Health

If a sip of cold water or a bite of ice cream makes you wince in pain, you’re not alone. Tooth sensitivity affects millions. 

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Most people simply reach for special toothpaste that offers some relief, but only for a short while.

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Now, scientists at the Indian Institute of Science (IISc) in Bengaluru, along with the startup Theranautilus, have come up with a futuristic fix: CalBots.

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These nanobots can travel deep into the tooth, far deeper than toothpaste ever could, to seal the tiny channels (called dentinal tubules) that lead to the nerves. 

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The team hopes this technology could one day be used in dental clinics everywhere – giving patients quick, long-lasting relief in just one visit.