2007 International Robot Exhibition

TOKYO - NOVEMBER 28: A trainee dentist treats teeth of patient robot "Simroid" by Kokoro Company Ltd at Tokyo Big Site on November 28, 2007 in Tokyo, Japan. The robot reacts to dentists treatments when the robot sensors pain and discomfort, The robot is expected to help bringing up dentists take care of mental aspect of the patients. The International Robot Exhibition takes place every 2 years since 1973. (Photo by Koichi Kamoshida/Getty Images)