A new electromechanical device to measure the accuracy of interocclusal records.

A new electromechanical device was developed for measuring vertical dimension. This device monitored accuracy and vertical displacement of various dental materials during the transfer of interocclusal relationships to an articulator. Polyether was the most precise material tested. Its accuracy was in the 20 to 30 micron range and also recommended for use because of other desirable characteristics. The accuracy of the remaining materials from displacement were, in descending order, Dura-Lay acrylic resin, wax, and wax plus zinc oxide. The electromechanical system was tested and verified as accurate, reliable, convenient, and easy to use.