TOOTH SENSITIVITY NANOBOTS TO THE RESCUE

Switch on the TV and it won't be long before you run into a toothpaste ad for sensitive teeth.

- By Ajay Sukumaran

Dental hypersensitivity affects nearly one in four people worldwide. It occurs when tooth enamel erodes or the gum recedes, exposing the inner layer of hard tissue, the dentine. Inside the dentine are tiny fluidfilled tunnels, or tubules, which lead to nerve-endings where a twinge is felt when teeth come in contact with cold substances.