The prototype of "Smart Tooth" is installed in the mouth of a person during a trail session in a laboratory at the Department of Computer Science and Information Engineering at National Taiwan University in Taipei, on September 2. "Smart Tooth," which is about 1cm in length, is a sensor designed to be embedded in the artificial tooth in order to track people's daily habits like chewing, smoking, drinking, coughing or overeating. The sensor can detect mouth movements and the attached wires can send data to the researchers, according to Kelvin Li, a "Smart Tooth" researcher at the university.  Reuters/Pichi Chuang