Solid free-form fabrication methods for the production of dental restorations
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United States of America Patent
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Jul 21, 2009
Grant Date -
Dec 30, 2004
app pub date -
Jun 18, 2004
filing date -
Jul 10, 1998
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Abstract
Solid free form fabrication techniques such as fused deposition modeling and three-dimensional printing are used to create a shell or die used in the manufacture of a dental restoration. Three-dimensional printing includes ink-jet printing a binder into selected areas of sequentially deposited layers of powder. Each layer is created by spreading a thin layer of powder over the surface of a powder bed. Instructions for each layer may be derived directly from a CAD representation of the restoration. The area to be printed is obtained by computing the area of intersection between the desired plane and the CAD representation of the object. All the layers required for an aesthetically sound shell can be deposited concurrently slice after slice and sintered/cured simultaneously.
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