Process of making a dental blank
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United States of America Patent
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Sep 1, 2015
Grant Date -
Mar 21, 2013
app pub date -
Sep 14, 2012
filing date -
Dec 28, 2006
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status (Latency Note)
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Abstract
A dental blank has at least an inner zone (or layer) of a first color and an outer zone (or layer) of a second color, wherein the inner and outer zones are concentric. The inner zone can be surrounded in its entirety by the outer zone such that only the outer zone is visible on all surfaces of the blank. Alternatively, the inner zone and the outer zone can extend to a same single surface of the blank, such that only the outer zone covers all remaining surfaces. The blank may also have an intermediate zone between the inner and outer zones. A method of fabrication includes solid free form processes, such as robocasting, laser sintering and 3D printing that allow for placement of multiple colors. A dental restoration made from the blank can have a variety of shades depending on a ratio of milled outer layers to internal layers.
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