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Access Portal for Dental Informatics, Computerized Dentistry and Dental CAD/CAM




 Computer-Integrated Ceramic Reconstruction

The CICERO method of crown fabrication was developed at the Academic Center of Dentistry Amsterdam (ACTA) and consists of optically digitizing a gypsum die, designing the crown layer build-up, and subsequently pressing, sintering, and milling consecutive layers of a shaded high-strength alumina-based core material, a layer of dentine porcelain, and a final layer of incisal porcelain. Final finishing is done in the dental laboratory. The CICERO method allows efficient production of all-ceramic restorations without compromising esthetics and function. CICERO was the first CADCAM system, whereby:

 - triangulation by laser section scanning was applied;

 - black/white contrast for unambiguous prep finding was used;

 - a virtual articulator was integrated with occlusal surface

    design of generic library teeth [van der Zel 93];

 - a layered crown with a dentin and incisal on alumina was

    produced with high aesthetics [van der Zel 01/2];

 - a FEM model was used to verify the dental crown design.





The CICERO precursor has catalyzed most presently developed CADCAM systems. The project was supported by a grant from the Foundation for Technical Sciences STW: ATH.3637.