Abstract: Method and tool for fracturing the cement interface between a crown and a tooth or a fixture on a tooth and the tooth. The method is accomplished by positioning a clamp having a driven rapid impacting tool against one side portion of a crown or fixture covering the tooth. The working edge of the tool is covered with a first malleable metal cap and is in interfacing abutment with said crown or fixture. The opposed side of the crown or fixture is abutted against an anvil which is part of the clamp. The anvil is covered with a thicker second malleable cap.