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US 2023/0201081 A1Published application
Dental polishing paste and method for dental ceramics
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.
Claims19
1:
- A method of surface finishing a dental ceramic present in an oral cavity of a subject, the method comprising:
- polishing a 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 at least one selected from the group consisting of diamond and 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 the dental ceramic is formed of a matrix material selected from the group consisting of lithium disilicate and monolithic zirconia.
2:
- The method of claim 1, wherein the additive comprises at least three selected from the group consisting of a humectant, a secondary abrasive, a surfactant, a thickener, a fluoride source, a re-mineralizing agent, an anti-tartar agent, a preservative, and a flavoring agent.
3:
- The method of claim 1, wherein the polishing is performed at 10,000 to 25,000 revolutions per minute (rpm).
4:
- The method of claim 1, wherein the polishing is performed for 60 to 180 seconds (s).
5:
- The method of claim 1, wherein the polishing is performed using 0.5 milliliter (mL) dental polishing paste per 150 to 250 square millimeter (mm2) of the surface of the dental ceramic.
6:
- The method of claim 5, wherein the dental polishing paste is used in 2 to 6 aliquots applied at regular time intervals throughout a duration of the polishing.
7:
- The method of claim 1, wherein the polishing is performed using a felt cone.
8:
- The method of claim 1, further comprising pre-polishing the surface of the dental ceramic with a pumice slurry.
9:
- The method of claim 8, wherein the pre-polishing is performed at 10,000 to 25,000 rpm and for 30 to 90 seconds.
10:
- The method of claim 8, wherein the pre-polishing is performed using 0.2 mL pumice slurry per 150 to 250 mm2 of the surface of the dental ceramic.
11:
- The method of claim 8, wherein the pre-polishing is performed using a rubber prophy cup.
12:
- The method of claim 1, wherein the polished dental ceramic has a mean surface roughness of 0.250 to 0.500 micrometer (μm).
13:
- The method of claim 12, wherein the dental ceramic is lithium disilicate, the inorganic nanoparticles are zirconia, and the polished dental ceramic has a mean surface roughness of 0.350 to 0.500 μm.
14:
- The method of claim 12, wherein the dental ceramic is lithium disilicate, the inorganic nanoparticles are diamond, and the polished dental ceramic has a mean surface roughness of 0.250 to 0.425 μm.
15:
- The method of claim 12, wherein the dental ceramic is monolithic zirconia, the inorganic nanoparticles are zirconia, and the polished dental ceramic has a mean surface roughness of 0.250 to 0.425 μm.
16:
- The method of claim 12, wherein the dental ceramic is monolithic zirconia, the inorganic nanoparticles are diamond, and the polished dental ceramic has a mean surface roughness of 0.300 to 0.425 μm.
17:
- A dental polishing paste, comprising
- 60 to 90 wt. % glycerin;
- 7.5 to 17.5 wt. % inorganic nanoparticles having a mean particle size of 5 to 25 nm and which are at least one selected from the group consisting of diamond and zirconia;
- and
- 2.5 to 32.5 wt. % an additive, each based on a total weight of dental polishing paste.
2 more elements
18:
- The dental polishing paste of claim 17, wherein the additive is at least three selected from the group consisting of a humectant, a secondary abrasive, a surfactant, a thickener, a fluoride source, a re-mineralizing agent, an anti-tartar agent, a preservative, and a flavoring agent.
19:
- The dental polishing paste of claim 18, wherein the additive comprises calcium carbonate, water, sodium lauryl sulfate, sodium monofluorophosphate, cellulose gum, tetrasodium pyrophosphate, benzyl alcohol, sodium saccharin, and xanthan gum.