Quartz-free powdered magmatic nepheline rock material for the surface treatment of dental parts, especially grinding, polishing and/or blasting material
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United States of America Patent
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Jan 10, 1995
Grant Date -
N/A
app pub date -
Sep 8, 1992
filing date -
Sep 7, 1991
priority date (Note) -
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Abstract
The invention is directed to the creation of a material which does not have the hazardous properties of prior art materials containing quartz. In the material according to the invention, quartz is replaced with a quartz-free magmatic rock, especially nepheline syenite. Surprisingly, the magmatic rock in powdered form attains nearly the same treatment results as conventional materials which contain quartz. The material according to the invention is particularly suitable for polishing and blasting dental parts, especially those parts which are made of plastic material.
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