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Acta stomatologica Croatica, Vol.36 No.3 September 2002. -

CEREC is a computerized method to produce ceramic reconstructions chairside. It had been developed in the Eighties by Professor Dr.med.dent. Werner H. Mörmann und Dr. sc. techn. El. Ing Marco Brandestini at the University of Zürich in Switzerland. The most actual version in the CEREC-Series is CEREC 3. It is a robot in which

CAD-CAM-techniques are applied and prefabricated dental materials ceramics and polymers are used. Target group are primarily dentists; since CEREC InLab is on the market dental technicians also.

According to the general CEREC-principle, an optical impression is used as -worksheet- to construct every restoration in-on any single tooth - from a simple class I-or class V-restoration to any partial or full crown - in a very simple but sophisticated manner: The CEREC-user only has to design the so-called -bottom line-, all other constructions are generated automatically. Besides that every

modification may be introduced manually. The milling process is fully automatic. The restorations are adapted to the tooth structures by modern adhesive techniques. From survival analyses it could be shown, for example by the study of Reis and Walther 2000, that from 1,010 inlays which were applied to the posterior teeth in

299 patients in a routine dental practice, after 9 -12 years the probability of success calculated by Kaplan-Meier Analysis decreased to 90% after 10 years s = .018 and 85% after 11.8 years with no further loss until the 12-year termination point. Measuring parameter as inlay fracture, cusp fracture, new proximal lesion, recurrent caries, persistent hypersensitivity, endodontic complications, prosthetic and unknown causes with replacement alio

loco respectively showed no significant difference in clinical success between maxillary and mandibulare teeth, neither between the sizes and the outlines of the restoration. However, premolars rated better than molars, vital teeth better than non-vital teeth. The application of dental adhesive techniques increased the probability of success.

Only 81 8% failures were recorded, mainly due to fractures of the ceramic and tooth structure 50%. In summary, CEREC using simple but sophisticated hard- and software in combination with trustworthy modern dental materials is an ingenious and clinical reliable

concept in restorative dentistry with the potency of an enormous impact at high quality dentistry and dental education. Indeed, CEREC is an ingenious concept in restorative dentistry.

Autor: J. Rotgans -

Fuente: http://hrcak.srce.hr/


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