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US 12,721,791 B2Granted
Method for polishing a dental ceramic with nanoparticle composition
AssigneeImam Abdulrahman Bin Faisal University
InventorsMohamed Amr Aly Mahrous Ghanem, Mohamed Moustafa Ahmed Gad
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Abstract
A dental polishing paste and a method of surface finishing a dental ceramic with the dental polishing paste is described. The dental polishing paste includes 60 to 90 weight percentage (wt. %) glycerin; 7.5 to 17.5 wt. % inorganic nanoparticles such as, diamond or zirconia, having a mean particle size of 5 to 25 nanometer (nm); and 2.5 to 32.5 wt. % additive, each based on a total weight of dental polishing paste.
Claims9
A method of surface finishing a dental ceramic with zirconia nanoparticles, the method comprising:
- pre-polishing a surface of the dental ceramic with a pumice slurry;
- polishing the surface of the dental ceramic present in the oral cavity of the subject with a dental polishing paste comprising 60 to 90 weight percentage (wt. %) glycerin, 7.5 to 17.5 wt. % inorganic nanoparticles having a mean particle size of 5 to 25 nanometer (nm) and which are zirconia, and 2.5 to 32.5 wt. % of an additive, each based on a total weight of the dental polishing paste, to produce a polished dental ceramic, wherein during the polishing the dental polishing paste is contacted with the surface of the dental ceramic with a rotating felt cone,
- wherein the dental ceramic is formed of lithium disilicate;
- and
- the polished dental ceramic has a mean surface roughness of 0.350 to 0.500 micrometers (μm).
2 more elements
Dependencies are inferred from the claim text.