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1. (WO2017155692) PREFORMED DENTAL COMPOSITE CROWN, PROCESS OF PRODUCTION AND USE THEREOF

Pub. No.:    WO/2017/155692    International Application No.:    PCT/US2017/018856
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Thu Feb 23 00:59:59 CET 2017
IPC: A61K 6/09
A61C 5/00
A61C 13/00
Applicants: 3M INNOVATIVE PROPERTIES COMPANY
Inventors: HERRMANN, Andreas
SCHECHNER, Gallus
HECHT, Reinhold
MAYR, Helmar
KORTEN, Malte
HOFMANN, Bernhard
RAIA, Gioacchino
MEURER, Till
Title: PREFORMED DENTAL COMPOSITE CROWN, PROCESS OF PRODUCTION AND USE THEREOF
Abstract:
The invention relates to a preformed dental composite crown being characterized by its shape and chemical composition, the shape being characterized as follows: having an occlusal top surface and depending buccal, mesial, distal and lingual side surfaces, the side surfaces being connected to each other and forming a crown cervix, the wall thickness of the crown at the crown cervix being lower than 0.6 mm; at least two of opposing depending side surfaces having a concave shape; the chemical composition of the material the preformed dental composite crown is made of being a hardened composition comprising the following components: nano-filler(s) in an amount from 20 to 70 wt.%, resin matrix in an amount from 20 to 75 wt.%, wt.% with respect to the weight of the chemical composition, the resin matrix comprising urethane(meth)acrylate(s) and (meth)acrylate(s) not comprising a urethane moiety. The invention also relates to a kit of parts comprising such a preformed dental composite crown, processes for producing such crowns and the use of such a crown for treating a dental tooth.