Process for producing dental prostheses
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United States of America Patent
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Dec 30, 1997
Grant Date -
N/A
app pub date -
Mar 4, 1996
filing date -
Jun 24, 1993
priority date (Note) -
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Abstract
A process for producing ceramic dental prostheses, with which ceramic dental prostheses may be produced in the same diversity of shapes and with the same accuracy as metal dental prostheses. The process includes shaping an unfinished piece made out of 92.1 to 93.5 wt. % zirconium oxide, 4.5 to 5.5 wt. % yttrium oxide, 1.8 to 2.2 wt. % hafnium oxide, and reworking the piece to form a dental prosthesis by means of a rotating tool made of metal-bonded diamond grains.
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