Abstract: A dental appliance stand is provided with an equipment tray and remote-controlled positioning means for simultaneously rotating and vertically advancing the tray between an out-of-the-way position to one side of the patient chair and a use position directly over the patient chair. The positioning means includes a rotatable worm screw with a worm follower for imparting vertical movement to the tray and a guide cylinder with an elongated guide slot, a section of which has a helical pattern, for engagement with a guide pin extending radially from the worm follower to impart rotational movement to the tray.