Abstract: At least one adjusting element aligns a first surface of a test body, comprising a dentine and/or enamel surface, plane-parallel with respect to a contact surface and/or to at least one second surface, which is optionally coated with an adhesive dental material. The at least one adjusting element in a device is usable to produce an adhesive bond at the contact surface between the first surface and the at least one second surface. A method determines necessary force to be applied to separate or break the adhesive bond at the force surface and/or contact surface between the first and the at least one second surface.

Abstract: The invention is directed to a liquid crystal display having two opposed substrates, a liquid crystalline medium contained between the substrates, and a plurality of electrodes arranged on the substrates to produce a multiplicity of pixels. According to the invention, the electrodes are configured in such fashion that the pixels have round contours. The pixels may also have contours in the form of a polygon with more than four sides. Preferably pixels with roughly circular contours are produced.