Abstract: The dental device for insertion of a crown is a tool for marking an occlusally reduced tooth prior to application of a crown thereon, and for testing whether the tooth has been sufficiently reduced for proper application of the crown. The dental device includes a marking portion frangibly joined to a resistance testing portion. The marking portion includes a marking layer formed of a transferable material so that, following occlusal reduction of the tooth, the marking portion is separated from the resistance testing portion, and the marking layer is positioned against an upper surface of the tooth. The patient bites down on the marking layer to mark raised regions of the upper surface of the tooth, and subsequently bites down on the resistance testing portion, to test if the tooth has been sufficiently reduced for application of a crown thereon.

Abstract: The vehicle static electricity discharge device is an electrostatic discharge system for a road vehicle including an electrically conducting rod in electrical contact with a. thin film resistor which in turn is in electrical contact with an electrically conducting part of the vehicle body. An actuator mountable to the vehicle can reversibly and pivotally move the conducting rod between a position that contacts the ground and a retracted position removed from ground contact. An actuator energizer operatively connected to the actuator selectively energizes the actuator for deployment of the conductor rod to contact the ground so as to provide an electrical pathway for electric charge from the electrically conducting part of the vehicle body, through the thin film resistor, and then to the ground for a predetermined interval, and wherein in the retracted position the conductor element is distanced from the ground so as to interrupt the electrical pathway.