Abstract: A method of producing a multicolor glass-ceramic blank (10) for dental purposes. A glass-ceramic blank (10) is produced from at least a first material powder (18) and a second material powder (20), wherein the first material powder (18) and the second material powder (20) are different-colored and wherein at least one of first material powder (18) and second material powder (20) has nanoparticles (14) and/or glass-ceramic particles (16). The first material powder (18) and the second material powder (20) are introduced into a mold (22) in order to form at least one powder mixture aggregate (26). Additionally, the powder mixture aggregate (26) is compressed by hot pressing in order to form the glass-ceramic blank (10). A multicolor glass-ceramic blank (10) is obtainable by such a method and the multicolor glass-ceramic blank (10) is used as dental material.

Abstract: A multiple mold (42) for production of at least two glass-ceramic blanks. The glass-ceramic blanks are for dental purposes and are produced from at least two powder blanks by hot pressing. The multiple mold (42) includes a frame (48) that defines at least sections of a receiving volume (50) for the at least two powder blanks. Additionally provided is a separating element (52) which is disposed within the receiving volume (50) and divides the receiving volume (50) into at least two subvolumes, each of which is designed to accommodate one of the at least two powder blanks. Also described are the use of the multiple mold (42) for production of a glass-ceramic blank for dental purposes, a compression apparatus and a continuous system for production of glass-ceramic blanks for dental purposes.

Abstract: 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, wherein the holder includes a joining surface for joining to the mill blank, a securing shaft having at least one securing surface for securing to a housing of a milling unit of a CAD/CAM system, wherein the securing shaft 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; and 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.

Abstract: 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, wherein the holder includes a joining surface for joining to the mill blank, a securing shaft having at least one securing surface for securing to a housing of a milling unit of a CAD/CAM system, wherein the securing shaft 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; and 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.