# US 12,109,082 B2 · Method for forming a denture base

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- Number: US 12,109,082 B2
- Document ID: US12109082B2
- Status: Granted
- Kind: B2
- Application number: 18/507,135
- Filed: 2023-11-13
- Published: 2024-03-21
- Granted: 2024-10-08
- Earliest claimed: 2019-10-23
- Assignees: Imam Abdulrahman Bin Faisal University
- Applicants: Imam Abdulrahman Bin Faisal University
- Inventors: Mohammed Moustafa Ahmed Gad; Shaimaa Mohamed Said Fouda; Fahad A. Al-Harbi; Ahmad M. Al-Thobity; Passent Safwat Aly Ellakany
- Web page: https://patentgrep.com/patent/US12109082B2

## CPC

- A61C 13/04: {made by casting}
- A61C 13/087: Artificial resin teeth {(A61C13/081 takes precedence; preparations A61K6/80)}
- A61K 6/887: Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- A61C 19/063: {Medicament applicators for teeth or gums, e.g. treatment with fluorides}
- A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00)
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)

## 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.

## Claims

### Claim 1

A method for forming a denture base, comprising:
fitting a patient for a denture base,
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 the mixture into a mold, and
polymerizing the mixture to form the denture base comprising 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 1)

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 cm3 different volumes of composite does not vary by more than 10%.

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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.

### Claim 7 (depends on 1)

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