Water-resistant polymer-based dental articles

Patent metadata

Field	Value
Publication number	US-11911236-B2
Application number	US-201816632463-A
Country	US
Kind code	B2
Filing date	Jul 24, 2018
Priority date	Jul 25, 2017
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

A dental article such as a dental tray aligner or a dental crown that includes a substrate including a polymeric material having a modulus of elasticity that reduces upon exposure to water and a water-resistant coating on the substrate, where the water-resistant coating comprises parylene. In some examples, the water-resistant coating may include one or more layers that include parylene.

First claim

What is claimed is:

1. A dental article comprising:
a polymeric substrate;
a first water-resistant coating comprising parylene, wherein the first water-resistant coating is in contact with the polymeric substrate; and
an additional layer comprising an inorganic material, a polymeric hardcoat, or a combination thereof, wherein the additional layer is in contact with the first water-resistant coating; and
a second water-resistant coating comprising parylene, wherein the second water-resistant coating is in contact with the additional layer comprising an inorganic material, a polymeric hardcoat, or a combination thereof.

2. The dental article of claim 1 , wherein the polymeric substrate comprises at least one of an acrylate polymer, a thermoset polymer, or a thermoplastic polymer, and wherein a modulus of elasticity of the polymeric substrate in a substantially dry condition is greater than about 100 MPa.

3. The dental article of claim 1 , being a dental tray aligner, a dental crown, a night guard, a retainer, a dental implant, a denture, a partial, a temporary dental replacement, an elastic band, a spring, a spring aligner, a polymeric archwire, an arch member, a custom force member, an attachment, a bracket, or a dental tray for delivering therapeutic agent.

4. The dental article of claim 1 , wherein the inorganic material comprises a metal, a metal alloy, a metal oxide, a metal salt, a ceramic, a glass, a mineral, or a combination thereof.

5. The dental article of claim 1 , further comprising a desiccant, wherein the desiccant is between the polymeric substrate and the water-resistant coating or incorporated within the polymeric substrate.

6. The dental article of claim 1 , wherein the polymeric substrate comprises a three-dimensionally printed polymeric substrate comprising a surface defining a plurality of contour lines that produce an aliasing effect, and wherein the water-resistant coating reduces the aliasing effect of the polymeric substrate.

7. A method of preparing a dental article of claim 1 , the method comprising:
providing a polymeric substrate, the polymeric substrate;
contacting the polymeric substrate with a first water-resistant coating, the first water-resistant coating comprising parylene;
contacting the first water-resistant coating with an additional layer, the additional layer comprising an inorganic material, a polymeric hardcoat, or a combination thereof; and
contacting the additional layer with a second water resistant coating comprising parylene.

8. The method of claim 7 , wherein the forming of the polymeric substrate is in the shape of a dental tray aligner, a dental crown, a night guard, a retainer, a dental implant, a denture, a partial, a temporary dental replacement, an elastic band, a spring, a spring aligner, a polymeric archwire, an arch member, a custom force member, an attachment, a bracket, or a dental tray for delivering therapeutic agent.

9. The method of claim 7 , further comprising forming the polymeric substrate, wherein the forming of the polymeric substrate comprises three-dimensional printing.

10. The method of claim 9 , wherein the forming of the polymeric substrate and the contacting of the polymeric substrate with the first water-resistant coating comprise:
coating a model of dental anatomy of a patient with the first water-resistant coating comprising parylene;
thermoforming a sheet of polymeric material over the first water-resistant coating;
trimming the sheet of polymeric material to form the polymeric substrate; and
separating the polymeric substrate from the model.

11. The method of claim 10 , further comprising contacting any exposed surfaces on the polymeric substrate with the first water-resistant coating.

12. The method of claim 7 , wherein the contacting of the polymeric substrate with the first water-resistant coating comprises chemical vapor depositing.

13. The method of claim 7 , wherein the contacting of the additional layer with the second water-resistant coating comprising parylene is via chemical vapor depositing.

14. The method of claim 7 , wherein the inorganic material comprises a metal, a metal alloy, a metal oxide, a metal salt, a ceramic, a glass, a mineral, or a combination thereof.

15. A dental article comprising:
a three-dimensionally printed polymeric substrate;
a first water-resistant coating comprising parylene, wherein the first water-resistant coating is in contact with the three-dimensionally printed polymeric substrate;
an additional layer comprising an inorganic material, a polymeric hardcoat, or a combination thereof, wherein the additional layer is in contact with the first water-resistant coating; and
a second water-resistant coating comprising parylene, wherein the second water-resistant coating comprising parylene.

16. The dental article of claim 15 , wherein the three-dimensionally printed polymeric substrate comprises a surface defining a plurality of contour lines that produce an aliasing effect, and wherein the first water-resistant coating reduces the aliasing effect of the three-dimensionally printed polymeric substrate.

17. The dental article of claim 15 ,
wherein the additional layer comprises an inorganic material.

Assignees

• 3M Innovative Properties Company

Inventors

• Parkar Zeba
• Raby Richard E
• Hansen James D

Classifications

• A61C7/08 Primary

  Mouthpiece-type retainers {or positioners, e.g. for both the lower and upper arch (arch-shaped medicament applicators for teeth or gums A61C19/063; mouthguards for protecting the teeth of sportsmen A63B71/085)} · CPC title

• B29C51/14

  using multilayered preforms or sheets · CPC title

• B29C51/266

  Auxiliary operations after the thermoforming operation (B29C51/42, B29C51/44, B29C51/46 take precedence) · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• C09D165/04

  Polyxylylenes · CPC title