In a method and apparatus for detecting a crack in a human tooth, especially one covered by a restoration, such as a crown, the approach is to stress the suspect tooth and, by means of acoustic emission techniques, analyze the characteristics of the resultant acoustic emission from the tooth. The disposable excreta management device comprises a flexible bag to contain excreta and an adhesive flange to attach the device to the body of a wearer. A wire co-extensive with the outer dimensions of the pump passes over the depression forming a space between the wire and the outside surface of the pump in the depression. When the carriage arm and the suspension torsionally vibrate, the vibration direction tilts against the normal direction of a recording surface in accordance with the twist. When the document cover is in the first position, the second inclined surface may generally align with the first inclined surface, may be immediately adjacent to the first inclined surface, and may be inclined less than the first inclined surface relative to the document receiving surface.