“A new ‘gas-firing’ device may offer a pain-free alternative to the dentist’s drill — and could make fillings even more hard-wearing. The device, which resembles an electric toothbrush, cleans out cavities in rotten teeth in only 30 seconds, according to new research. It works by generating high-energy gas and liquid particles to kill bacteria and blast out the decayed pulp of the tooth. The researchers at the University of Missouri who developed the device say it means less discomfort for patients, as it does not affect the highly sensitive nerves in the teeth.” w/ photos
