Patent ID: 8622377

Claim:
A holder for affixing a mill blank for the manufacture of a dental article in a housing of a milling unit of a CAD/CAM system comprising a joining surface for joining the holder to the mill blank; a securing shaft connected to the joining surface, the securing shaft having at least one securing surface for securing to a housing; wherein the securing shaft, in cross-sectional view, comprises an essentially polygonal shape with at least two lateral surfaces, wherein at least two of the lateral surfaces are arranged adjacent to each other and extend at right angles to each other; wherein the securing surface, in cross-sectional view, extends substantially perpendicular to a radius of the securing shaft extending essentially through the center of the securing surface and comprises a width that is less than the width of a lateral surface; and wherein a transition between adjacent lateral surfaces is formed by the at least one securing surface which extends transversely to both adjacent lateral surfaces at an angle of approximately 45 degrees.