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Computer copings for partial coverage.

H Denissen1, J van der Zel, J Reisig

  • 1Afdeling Orale Funktieleer en Prothetische Tandheelkunde, Academisch Centrum Tandheelkunde Amsterdam (ACTA), Louwesweg 1, 1066 EA Amsterdam, Nederland.

International Journal of Computerized Dentistry
|May 16, 2001
PubMed
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The Computer Integrated Crown Reconstruction (Cicero) system accurately digitizes complex posterior tooth preparations. This technology effectively designs and manufactures ceramic copings, demonstrating high precision for dental restorations.

Area of Science:

  • Dentistry
  • Biomaterials Science
  • Computer-Aided Design/Manufacturing (CAD/CAM)

Background:

  • Partial coverage posterior tooth preparations present significant challenges for digital workflows.
  • Accurate digitization, design, and manufacturing are crucial for successful ceramic coping fabrication.

Purpose of the Study:

  • To evaluate the compatibility of the Computer Integrated Crown Reconstruction (Cicero) system with novel partial coverage preparation designs.
  • To assess the system's capability in producing precise ceramic copings for posterior teeth.

Main Methods:

  • Posterior teeth were prepared for partial coverage copings with specific chamfer and bevel designs.
  • Optical impressions using laser-line scanning captured the 3D geometry of stone dies.
  • The Cicero system digitized, designed, and manufactured ceramic copings via computer-aided milling.

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Main Results:

  • The Cicero system achieved precise digitization of preparation surfaces with a 0.2% coefficient of variance.
  • The system produced ceramic copings with a mean marginal gap of 74 microns before porcelain veneering optimization.
  • The accuracy of digitization, design, and milling was validated.

Conclusions:

  • The Cicero computer technology is compatible with complex partial coverage posterior tooth preparations.
  • The system demonstrates capability in producing accurate ceramic copings for demanding dental applications.
  • This CAD/CAM approach offers a viable solution for fabricating partial coverage ceramic restorations.