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Tattooing Teeth With Graphene Could Warn of Bacteria and Dental Decay

Electronic tattoos promise to help people monitor health in all kinds of ways, from heart rates to blood sugar and more. Now here’s one that can monitor your tooth-brushing skills. A tooth-based sensor can detect different types bacteria in your saliva that can cause a variety of health problems.

The sensor is made of graphene and can detect bacteria in our mouths to the single-cell level, according to researchers at Princeton and Tufts universities. Michael McAlpine and colleagues developed a method to print graphene nanosensors onto a silk substrate. They added electrodes and an inductive coil to power the device, which can then be transferred onto teeth or other biological materials.

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