US 11,998,408 B2
Process of manufacturing a dental milling block with a homogeneous color and/or translucency gradient
Martin Goetzinger, OT Pflugdorf (DE); and Hans R. Schnagl, Jengen (DE)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Appl. No. 18/015,338
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
PCT Filed Jul. 19, 2021, PCT No. PCT/IB2021/056521
§ 371(c)(1), (2) Date Jan. 10, 2023,
PCT Pub. No. WO2022/023871, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 20188292 (EP), filed on Jul. 29, 2020.
Prior Publication US 2023/0270529 A1, Aug. 31, 2023
Int. Cl. A61C 13/00 (2006.01); A61K 6/802 (2020.01); B01F 23/60 (2022.01); B01F 27/231 (2022.01); B01F 27/806 (2022.01); B28B 3/00 (2006.01); B28B 11/24 (2006.01)
CPC A61C 13/0022 (2013.01) [A61K 6/802 (2020.01); B01F 23/60 (2022.01); B01F 27/2312 (2022.01); B01F 27/806 (2022.01); B28B 3/00 (2013.01); B28B 11/24 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A process of manufacturing a dental milling block, the process comprising the steps of
providing a mold with a cavity having a z-direction and an x/y-direction,
filling the cavity partially with a first powder up to a height H1, the first powder having a volume VP1 with a top and bottom surface,
introducing a second powder on top of the first powder up to a height H2, the second powder having a volume VP2 with a top and bottom surface and,
the top surface of the first powder being in contact with the bottom surface of the second powder and forming an intermediate region,
providing a mixer unit with at least one rotatable mixing element,
introducing the mixing element in z-direction into the intermediate region while it is rotating,
mixing the powder located in the intermediate region by rotating the mixing element,
removing the mixing element from the powder while it is rotating, and
compacting the powder,
optionally applying heat to the compacted powder,
the first powder differing from the second powder by its physical properties and/or chemical composition and/or color.