US 10,420,712 B2 · Mill blanks based on a polymerized, fracture-tough prosthesis material

Abstract

The subject matter of the invention is a three-dimensional molded body, in particular a milling blank, made of a polymerizable prosthetic material, which is suitable for milling machining by means of CNC and/or CAD/CAM, having a fracture toughness of greater than or equal to 1.9 Mpa·m1/2 and a fracture work of greater than or equal to 900 J/m2. The milling blank preferably comprises core-shell particles modified by an elastic phase and is optionally based on a content of urethane (meth)acrylate polymerized into the polymer. Moreover, a subject matter of the invention is the use of the milling blanks for the production of at least parts of dental prosthetic parts, such as a prosthesis, artificial teeth, bridges, or of orthodontic appliances and instruments in medical field.

Claims8

Dependent claims

Milling blank made of polymeric prosthetic material,

wherein the prosthetic material is present in the form of a three-dimensional moulded body, optionally being suitable for ablative machining, suitable as a CAD/CAM (computer-aided design/computer-aided manufacturing) milling blank, wherein the moulded body comprises (A) at least one polymer comprising 0.001 to 10% by weight of the moulded body of at least one urethane acrylate or urethane methacrylate polymerized into the polymer and (B) 0.001 to 10% by weight of the moulded body of core-shell particles modified by at least one elastic phase, whereby the moulded body has a fracture toughness of ≥1.9 Mpa m1/2 and a total fracture work of ≥900 J/m2.

Dependencies are inferred from the claim text.

Facts

Application

15/323,129Filed 30 Jun 2015

Priority

DE 10 2014 109 2331 Jul 2014

Published

US 2017/0156990 A18 Jun 2017

Granted

24 Sep 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification22 codes

A61K 6/887
Comprising natural or synthetic resins: compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
A61C 1/084
Positioning or guiding, e.g. of drills: of implanting tools
A61C 5/007
Filling or capping teeth: dental splints; teeth or jaw immobilisation devices; stabilizing retainers bonded to teeth after orthodontic treatments
A61C 5/77
Tooth crowns; Making thereof: methods or devices for making crowns

Mill blanks based on a polymerized, fracture-tough prosthesis material

Life of this patent

Mill blanks based on a polymerized, fracture-tough prosthesis material

Life of this patent

Abstract

Claims8