Acidity sensor creates a heat map of teeth at risk of decay

From engineers at the University of Washington-Seattle: “The team’s solution starts with an FDA-approved chemical dye that is applied to the teeth. An LED light is then applied through a purpose-built optical probe which interacts with this dye, creating fluorescent reactions that the probe then relays back to a central box. The system, which the team has called O-pH, then gives a numerical measurement of the pH levels, or acidity, of the plaque under inspection.”     MORE

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