Method of repairing an acrylic denture base and zirconia autopolymerizable resins therof

Patent metadata

Field	Value
Publication number	US-2018327614-A1
Application number	US-201715708921-A
Country	US
Kind code	A1
Filing date	Sep 19, 2017
Priority date	May 9, 2017
Publication date	Nov 15, 2018
Grant date	—

Abstract

A method of repairing an acrylic denture base employing an autopolymerizable acrylic reinforcement resin comprising zirconium dioxide nanoparticles is disclosed. Additionally, a kit comprising precursors of the acrylic reinforcement resin, the acrylic reinforcement resin, and an acrylic denture base comprising the acrylic reinforcement resin are disclosed.

First claim

1 : A method of repairing an acrylic denture base having a repair gap surface, the method comprising:
painting the repair gap surface of the acrylic denture base with a monomer liquid comprising methyl methacrylate thereby forming a painted repair gap surface; dispersing a nanocomposite powder in a second amount of the monomer liquid comprising methyl methacrylate thereby forming a reinforcement resin, the nanocomposite powder comprising;
an acrylic polymer powder comprising polymethyl methacrylate; and
zirconium dioxide nanoparticles;
applying and packing the reinforcement resin in excess to the painted repair gap surface of the acrylic denture base; and autopolymerizing the reinforcement resin thereby forming a repaired acrylic denture base.

2 : The method of claim 1 , wherein the nanocomposite powder comprises 1-10 wt % zirconium dioxide nanoparticles relative to the total weight of the nanocomposite powder.

3 : The method of claim 1 , wherein the zirconium dioxide nanoparticles have an average granularity of 50-130 nm.

4 : The method of claim 1 , wherein the zirconium dioxide nanoparticles have an average surface area of 5-15 m 2 /g.

5 : The method of claim 1 , wherein the reinforcement resin has a nanocomposite powder to monomer liquid mass ratio in a range of 0.5:1 to 3:1.

6 : The method of claim 1 , wherein the autopolymerizing is performed at a temperature of 20-50° C.

7 : The method of claim 1 , wherein the autopolymerizing is performed at a temperature of 20-30° C.

8 : The method of claim 1 , wherein the autopolymerizing is performed at a pressure of 10-50 psi.

9 : The method of claim 1 , further comprising treating the zirconium dioxide nanoparticles with a silane coupling reagent prior to the dispersing.

10 : The method of claim 9 , wherein the treating comprises immersing the zirconium dioxide nanoparticles in a solution comprising 1.0-5.0 g of the silane coupling reagent per liter of the solution.

11 : The method of claim 9 , wherein the silane coupling reagent is 3-(trimethoxysilyl)propyl methacrylate.

12 : The method of claim 1 , wherein the repaired acrylic denture base has a flexural or transverse strength of 60-95 MPa.

13 : The method of claim 1 , wherein the repaired acrylic denture base has an impact strength of 1.5-2.5 kJ/m 2 .

14 : The method of claim 1 , wherein the repair gap surface is in a form of at least one selected from the group consisting of a bevel joint, a butt joint, a rabbet surface, and a round surface.

15 : The method of claim 14 , wherein the repair gap surface is in a form of a bevel joint.

16 : A kit, comprising:
a monomer liquid comprising methyl methacrylate; and a nanocomposite powder, comprising;
an acrylic polymer powder comprising polymethyl methacrylate; and
1-10 wt % zirconium dioxide nanoparticles relative to the total weight of the nanocomposite powder, wherein the zirconium dioxide nanoparticles have an average granularity of 50-130 nm and an average surface area of 5-15 m 2 /g;
wherein the monomer liquid and the nanocomposite powder are suitable for forming a reinforcement resin that autopolymerizes at a temperature of 20-40° C. and a pressure of 10-30 psi.

17 : The kit of claim 16 , further comprising at least one selected from the group consisting of a silane coupling reagent, a polymerization accelerator, a cross-linking agent, and an adhesion promoter.

18 : The kit of claim 17 , further comprising a silane coupling reagent which is 3-(trimethoxysilyl)propyl methacrylate.

19 : An acrylic reinforcement resin, comprising:
polymethyl methacrylate formed by an autopolymerization reaction of methylmethacrylate at a temperature of 20-40° C.; and zirconium dioxide nanoparticles having an average granularity of 50-130 nm and an average surface area of 5-15 m 2 /g.

20 : An acrylic denture base comprising the acrylic reinforcement resin of claim 19 having a flexural or transverse strength of 60-95 MPa and an impact strength of 1.5-2.5 kJ/m 2 .

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Gad Mohammed Moustafa Ahmed
• Althobity Ahmad Maniallah H
• Rahoma Ahmed Mohamed
• Arrejaie Aws Saleh

Classifications

• C08K2003/2244

  of zirconium · CPC title

• C08K3/22

  of metals · CPC title

• A61K6/71

  Fillers · CPC title

• A61K6/889

  Polycarboxylate cements; Glass ionomer cements · CPC title

• A61K6/17

  Particle size · CPC title