EP 2309947 A1 20110420 - METHOD FOR THE PRODUCTION OF OXIDE DENTAL CERAMICS
Title (en)
METHOD FOR THE PRODUCTION OF OXIDE DENTAL CERAMICS
Title (de)
VERAHREN ZUR HERSTELLUNG VON OXIDISCHER ZAHNKERAMIK
Title (fr)
PROCÉDÉ POUR PRODUIRE UNE CÉRAMIQUE DENTAIRE OXYDÉE
Publication
Application
Priority
- EP 2009005481 W 20090729
- DE 102008036661 A 20080806
Abstract (en)
[origin: WO2010015350A1] The invention relates to a method for producing oxide dental ceramics, comprising the following steps: a) numeric data of the three-dimensional shape of an oxide dental ceramic article that is to be produced is provided, and the dimensions of the three-dimensional shape are numerically enlarged according to the expected subsequent shrinkage due to sintering; b) a master form of the enlarged three-dimensional shape is produced by means of a generative or abrasive process; c) a female mold is produced by copying the master form, said female mold being designed in such a way as to be made up of at least two parts; d) a feedstock containing an oxide-ceramic powder is introduced into the female mold at a temperature ranging from 60°C to 150°C; e) a cooled molded article is removed from the female mold and is debound, and the debound molded article is finally sintered to obtain a compact oxide dental ceramic article. In said method, no or very little material is wasted. Said method allows very fine edges of crowns and complex geometries to be created. The dental ceramic article can be directly colored in basic tooth colors by adding suitable substances to the feedstock. The number of required apparatuses can be kept low especially when using low-pressure injection molding processes.
IPC 8 full level
A61C 13/00 (2006.01); A61C 13/20 (2006.01); A61K 6/90 (2020.01)
CPC (source: EP US)
A61C 13/0004 (2013.01 - EP US); A61C 13/081 (2013.01 - EP); C04B 35/111 (2013.01 - EP); C04B 35/486 (2013.01 - EP); C04B 35/64 (2013.01 - EP US); C04B 38/0615 (2013.01 - EP); C04B 2111/00836 (2013.01 - EP); C04B 2235/3225 (2013.01 - EP); C04B 2235/6022 (2013.01 - EP); C04B 2235/6026 (2013.01 - EP); C04B 2235/9615 (2013.01 - EP); C04B 2235/9638 (2013.01 - EP); G16H 20/40 (2017.12 - US)
Citation (search report)
See references of WO 2010015350A1
Citation (examination)
EP 1543797 A1 20050622 - DEGUDENT GMBH [DE]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
DE 102008036661 A1 20100211; EP 2309947 A1 20110420; WO 2010015350 A1 20100211
DOCDB simple family (application)
DE 102008036661 A 20080806; EP 09777509 A 20090729; EP 2009005481 W 20090729