Servicio de Información Comunitario sobre Investigación y Desarrollo - CORDIS

Machining studies

Elephant investigated the machining of crowns using their Cicero CAD CAM system. The machinability was good and prototype crowns were produced. The machining conditions were found to be very different for Zirconia and alumina.

Prototype crowns were also machined using a CEREC machine, which is used chairside in a dental surgery. The machining time was 16 mins, which is attractive for this application (zirconia and alumina take about 3Hrs to machine with this system). Dimensional fit of the crowns was good and the TEC was close to alumina allowing dental porcelains used for overglazing alumina to be used.


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