"Plaque Attack is a 1983 video game for the Atari 2600 that was made by Activision. Loosely based on Space Invaders, the player must prevent food from destroying teeth in a person's mouth. Steve Cartwright, who designed the game, said that game was meant to help people develop good dental habits." Source: Wikipedia, "http://en.wikipedia.org/wiki/Plaque_Attack," available under the CC-BY-SA License.