The present invention relates to wallpaper and a method for manufacturing the same. With the assembling portion, the positioning member can be detachably assembled on the induction reader. The system also comprises a resistance control circuit comprising a transistor having an emitter, a base and a collector, and a first resistor coupled between the emitter and the collector. As a result, it is possible to obtain the highly reliable insulating layer which is excellent in the withstand voltage strength. The tooth cap is coupled to the sensor assembly and adapted to be positioned within the oral cavity and orientated along a biting surface.