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Related Experiment Videos

Non-cast titanium restorations in fixed prosthodontics.

K W Boening1, M H Walter, P D Reppel

  • 1Department of Prosthetic Dentistry, Dental School, Free University of Berlin, Germany.

Journal of Oral Rehabilitation
|May 1, 1992
PubMed
Summary

Titanium crowns made with the Procera system show acceptable fit for dental use. While some fit discrepancies exist, especially at margins, the crowns are clinically suitable with proper preparation.

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Area of Science:

  • Biomaterials Science
  • Dental Materials
  • Prosthodontics

Background:

  • Casting titanium for dental restorations presents unresolved challenges.
  • The Procera system utilizes spark-erosion and milling for crown fabrication.
  • Assessing the fit accuracy of titanium crowns is crucial for clinical success.

Purpose of the Study:

  • To evaluate the marginal and occlusal fit of Procera titanium crowns.
  • To assess fit accuracy before and after ceramic veneering.
  • To determine the clinical suitability of these titanium restorations.

Main Methods:

  • In vitro and in vivo measurements of space widths on conical, shoulder, and occlusal surfaces.
  • Evaluation of fit before and after ceramic veneering.

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  • Mechanical testing of the metal-ceramic compound using 3-point bending (DIN) and ISO tests.

    • Main Results:

    • Pre-veneering space widths: ~53 microns (conical, in vitro), ~69 microns (conical, in vivo).
    • Pre-veneering space widths: ~430 microns (shoulders/occlusal, in vitro), ~500 microns (shoulders/occlusal, in vivo).
    • Slight increases in space widths observed post-veneering; DIN test satisfactory, ISO test failed.

    Conclusions:

    • Procera titanium crowns demonstrate adequate fit for clinical application.
    • Consideration of space widths at margins and occlusal surfaces is essential.
    • Proper attention to tooth preparation requirements is vital for successful titanium crown placement.