Andreas Herrmann,Gallus Schechner,Reinhold Hecht,Helmar B. Mayr,Malte Korten,Bernhard Hofmann,Gioacchino Raia,Till Meurer
申请号：
US16813024
公开号：
US20200205935A1
申请日:
2020.03.09
申请国别(地区):
US
年份:
2020
代理人:
摘要：
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.
