Abstract: Apparatus supported on the brow beam of protective eye glasses worn by a dental patient provides a moveably positionable holder arm depending spacedly forward of a user's nose and spacedly below the user's mouth. The holder arm carries marking film holding structure for vertically adjustable frictional motion thereon. The marking film holding structure provides two pivotally interconnected holder arms extending toward the patient's mouth for adjustable frictional motion in a horizontal plane through the patient's mouth and substantially perpendicular to the holder arm. The holder arms releasably carry dental marking film structures having dental marking film supported by a rigid back releasably carried by the holder arms to allow marking of contact points of teeth of the opposed dental arches upon appropriate manipulation.