MADC Depth Markers by Dr Mark J. Caldwell, USA Depth marking for all areas of crown and bridgework. All-porcelain and CAD/CAM produced restorations place high demands on dental preparations. The success of a restoration depends to a high extent upon the compliance of the minimal wall thickness of the restoration (Teamwork 6/2007; Prof. Dr. Frankenberger et.al.). With these seven instruments it is possible to define the prepared margin at the depths of 0.3 to 2.0 mm.
