Toothbrush and System with Sensors and User Identification

A toothbrush provides a unique opportunity to integrate health monitoring sensors into an object widely used by the mass population daily. A toothbrush is provided with various health monitoring sensors including an orientation sensor, oximetry sensor, capacitive sensor, pressure sensor, and temperature sensor. Further, the toothbrush is comprised in a system including a data transfer medium (i.e. "smartphone") and the Cloud, which allows for data transfer between multiple platforms from the toothbrush. The system further allows for passive participation in social games with awards and incentives. The system and toothbrush further provide for active participation in brushing games to encourage proper brushing techniques. Further, the toothbrush also provides a user identification system utilizing capacitive coupling of the human body and a mobile unit that is optionally a "smartphone." The mobile unit of the user identification system may also be used for user identification by other devices that require the user to touch them for proper use.