Slip-casting method of fabricating zirconia blanks for milling into dental appliances
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United States of America Patent
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Issued Date -
May 7, 2009
app pub date -
Oct 27, 2008
filing date -
Nov 5, 2007
priority date (Note) -
Abandoned
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Abstract
A process for fabricating pre-sintered zirconia blanks that are then computer machined and sintered to form dental appliances having highly advantageous features. The principal steps of a preferred embodiment of that process comprise a) preparing a ceramic slurry of binderless zirconia powder; b) subjecting the slurry to attrition milling; c) preparing a vacuum assisted slip casting mold and pouring the milled slurry into the slip-casting mold; d) after casting, excess slurry is poured from the mold and a consolidated zirconia blank is removed; e) drying the blank and pre-sintering it to form solid blanks ready for CAD/CAM machining and sintering to net shape.
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