| 摘要 |
The invention relates to a preform made of a cross-linked composite material to be machined in order to form crowns or bridges, especially by means of CAD/CAM, comprising an infrastructure formed by laying fibre-based fabrics one on top of the other, the fabrics being impregnated with a resin and being substantially spread over the thickness of said infrastructure, characterised in that it also contains a resin-based suprastructure, said suprastructure being fibre-free and secured to the infrastructure over the entire upper and lower surface thereof. |
