Three-dimensional fabricating material systems and methods for producing layered dental products

Patent metadata

Field	Value
Publication number	US-10299896-B2
Application number	US-201715628194-A
Country	US
Kind code	B2
Filing date	Jun 20, 2017
Priority date	Jun 20, 2016
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

This invention designs and builds multiple layers (two layers or more) of various dental devices, specifically denture base or denture, where printed multiple layered denture base with teeth cavities to receive artificial denture tooth materials to form final dental devices, such as partial and full dentures. It can also print denture teeth. This invention also designs and prints multiple layers (two layers or more) of denture base with artificial denture teeth to form final dental devices, such as partial and full dentures. A method for manufacturing a layered denture is provided. The invention provides a multiple layered denture base materials for printing a denture base. The invention also provides a multiple layered denture tooth materials for printing artificial denture teeth. Highly shape adjustable or shape memory polymer layer(s) may be used in these multiple layered denture base forms. Different layer of material has different mechanical and physical properties to meet different need, which provide added benefits to the patients, dental professional and dental laboratory.

First claim

The invention claimed is:

1. A dental component formed from rapid prototyping comprising at least one first layer having a first composition and at least one second layer having a second composition that is different form the first composition,
wherein the first composition includes:
an oligomer formed from the reaction of an isocyanate end-capped intermediate product and a hydroxyl based methacrylate;
at least one polymerizable acrylic compound selected from the group consisting of a phenoxy based methacrylate, a cyclohexyl based methacrylate, a dimethacrylate, and mixtures thereof;
a rubber impact modifier; and
a photoinitiator;

wherein the second composition includes:
a urethane monomer;
a glycol dimethacrylate;
a filler including glass particles having an average particle size from about 0.1 to about 10 micrometers; and
a photoinitiator.

2. The dental component of claim 1 , wherein the first composition, when cured, has flexural strength ranging from 30 to 70 MPa.

3. The dental component of claim 1 , wherein the first composition, when cured, has fracture toughness ranging from 2.4 to 2.6 MPa m 1/2 .

4. The dental component of claim 1 , wherein the second composition, when cured, has flexural strength ranging from 120 MPa to 200 MPa.

5. The dental component of claim 1 , wherein the first composition, when cured, has fracture toughness ranging from 1.8 MPa to 2.2 MPa m 1/2 .

6. The dental component of claim 1 , wherein the first composition, the second composition or both further includes a stabilizer.

7. The dental component of claim 6 , wherein the stabilizer is selected from the group consisting of butylated hydroxytoluene and methyl ether of hydroquinone.

8. The dental component of claim 1 , wherein at least one polymerizable acrylic compound includes the phenoxy based methacrylate that is selected from the group consisting of 2-hydroxy-3-phenoxypropyl acrylate, 2-phenoxyethyl (meth)acrylate, and phenoxy benzyl (meth)acrylate.

9. The dental component of claim 1 , wherein at least one polymerizable acrylic compound includes the cyclohexyl based methacrylate that is selected from the group consisting of cyclohexyl (meth)acrylate, 4-tert-butylcyclohexyl (meth)acrylate, isobornyl cyclohexyl (meth)acrylate; cyclohexyl (meth)acrylate, and trimethylcyclohexyl (meth)acrylate.

10. The dental component of claim 1 , wherein at least one polymerizable acrylic compound includes the dimethacrylate that is selected from the group consisting of ethoxylated bisphenol A-dimethacrylate, urethane di(meth)acrylate (UDMA), diurethane dimethacrylate (DUDMA), 4,13-dioxo-3,14 dioxa-5,12-diazahexadecane-1,16-diol dimethacrylate, and 4,19-dioxo-3,20 dioxa-5,18-diazahexadecane-1,22-diol dimethacrylate.

11. The dental component of claim 1 , wherein the filler is selected from the group consisting of silanized barium boron aluminosilicate and silanized fluoride barium boron aluminosilicate.

Assignees

• Dentsply Sirona Inc

Inventors

• Sun Benjamin J
• Ammon Dan

Classifications

• A61K6/884

  comprising natural or synthetic resins · CPC title

• A61C13/0019 Primary

  using three dimensional printing · CPC title

• A61C13/0004

  Computer-assisted sizing or machining of dental prostheses · CPC title

• C08G18/10

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title

• A61C2202/01

  Packaging for light-curable material · CPC title