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Related Experiment Videos

[Comparative studies on different full and veneer-ceramic crowns].

E J Richter, K Bieniek, H Küpper

    Deutsche Zahnarztliche Zeitschrift
    |November 1, 1989
    PubMed
    Summary

    Porcelain-fused-to-metal (PFM) crowns showed superior marginal integrity compared to other tested crown types. However, significant statistical variations mean results should be interpreted cautiously.

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    Clinical oral investigations·2013

    Area of Science:

    • Dental materials science
    • Prosthodontics
    • Materials engineering

    Background:

    • Marginal integrity is crucial for the longevity and success of dental restorations.
    • Different types of all-ceramic and porcelain-fused-to-metal crowns are available, each with unique material properties and fabrication methods.

    Purpose of the Study:

    • To compare the marginal defect prevalence among Dicor, Hi-Ceram, Ceraplatin, and porcelain-fused-to-metal (PFM) crowns.
    • To evaluate the performance of various crown materials under standardized quasi-clinical conditions.

    Main Methods:

    • Four types of dental crowns (Dicor, Hi-Ceram, Ceraplatin, PFM) were fabricated on a single metal master die.
    • Marginal integrity of the crowns was examined using an electron microscope under quasi-clinical conditions.
    • Standardized cementing procedures and measurement points were employed for all specimens.

    Main Results:

    • Porcelain-fused-to-metal (PFM) crowns demonstrated significantly better marginal integrity compared to Dicor, Hi-Ceram, and Ceraplatin crowns.
    • Despite the observed superiority of PFM crowns, substantial statistical variances were noted in the data.
    • The findings suggest a relative advantage for PFM crowns, but the variability necessitates careful consideration.

    Conclusions:

    • PFM crowns exhibit superior marginal adaptation compared to the tested all-ceramic alternatives under the study conditions.
    • The significant statistical variances highlight the need for further research with larger sample sizes to confirm these findings.
    • Clinical recommendations should consider the observed material performance alongside the inherent variability in marginal defect rates.

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