Method for making composite denture material

Patent metadata

Field	Value
Publication number	US-11850108-B2
Application number	US-202318339256-A
Country	US
Kind code	B2
Filing date	Jun 22, 2023
Priority date	Oct 23, 2019
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

A curable composite material containing nanodiamonds, denture bases and other dental prosthetics made from the composite material and methods for treating dental stomatitis using these prosthetics.

First claim

The invention claimed is:

1. A method for making a composite denture material, comprising:
mixing a powder comprising nanodiamonds having a particle size of about 20 to 40 nm with methyl methacrylate resin powder to form a mixture,
casting and polymerizing the mixture to form a denture base of the PMMA composite material, and
polishing the denture base;
wherein the PMMA composite material, comprises:
a poly(methylmethacrylate) (PMMA) matrix, and
0.1 to 1.0 wt. % of the nanodiamonds based on a total weight of the PMMA composite material,
wherein the PMMA has a molecular weight of 50,000 to 1,000,000 g/mol,
wherein the PMMA composite material is porous having pores 80 to 100 μm in size,
wherein the nanodiamonds fill pores of the PMMA composite material,
where the nanodiamonds are only in the pores on the PMMA composite material, and

wherein the PMMA composite material has a surface roughness (Ra) of no more than 0.2 μm.

2. The method of claim 1 , further comprising:
including rubber nanoparticles during the mixing.

3. The method of claim 1 , wherein the polymerizing forms the PMMA composite material having a molecular weight as measured by gel permeation chromatograph (GPC) of 300,000 to 1,000,000 g/mol.

4. The method of claim 1 , wherein the nanodiamonds have an average particle size of about 30 nm and the nanodiamonds are uniformly distributed in the PMMA composite material so that the density of nanodiamonds between cm 3 different volumes of composite does not vary by more than 10%.

5. The method of claim 1 , wherein the nanodiamonds have an average diameter of about 30 nm.

6. The method of claim 1 wherein Candida albicans binds to said PMMA composite material less than a control or otherwise identical composite material not containing nanodiamonds.

7. The method of claim 1 , wherein the polishing is continued until the surface roughness (Ra) of the denture is no more than 0.1.

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Gad Mohammed Moustafa Ahmed
• Fouda Shaimaa Mohamed Said
• Al-Harbi Fahad A
• Al-Thobity Ahmad M
• Ellakany Passent Safwat Aly

Classifications

• A61C13/087 Primary

  Artificial resin teeth {(A61C13/081 takes precedence; preparations A61K6/80)} · CPC title

• A61K6/887

  Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• A61C13/04 Primary

  made by casting · CPC title

• A61C19/063

  Medicament applicators for teeth or gums, e.g. treatment with fluorides · CPC title