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|1. (WO2017155692) PREFORMED DENTAL COMPOSITE CROWN, PROCESS OF PRODUCTION AND USE THEREOF|
|Applicants:||3M INNOVATIVE PROPERTIES COMPANY
|Title:||PREFORMED DENTAL COMPOSITE CROWN, PROCESS OF PRODUCTION AND USE THEREOF|
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.