Abstract: A dental device and process ideally suited for use with a tooth which may required bases or liners during the preparation of the tooth that is to receive restoration is disclosed. The device comprises a shank, which acts as a handle, and a tip. The tip is specifically designed for a particular location on tooth. This will provide for a set of tools, wherein each tip is configured for maximizing placement of the dycal either on the pulpal floor of a small or large cavity or on the axial wall of the tooth. For placement on the pulpal floor of a small cavity the tip includes a flat hexagonal shape; for placement on the pulpal floor of a large cavity, the tip includes a plunger shape; and for placement on the axial wall of the tooth, the tip includes a flat golf-club shape. Each tip can be fabricated from or coated with titanium nitride.

Abstract: An optical fluid level monitor is disclosed. It comprises a plurality of prismatic sensors disposed in a linear array for measuring the levels of fluids, such as oil, in sumps of aircraft and helicopter engines and other closed containers. In use each of the sensors is sequentially pulsed by an integral light source. If the detector is above the fluid level it appears bright, if below it appears bright, if below it appears dark, this difference being caused by an integral light detector device. Counting circuits are provided to determine the number of bright sensors and electronically convert this into a fluid volume for display purposes. A presettable low volume alarm is also included as is a correction circuit to compensate for volume changes caused by heating of the fluid in use.