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Related Experiment Videos

Attrition at the enamel-restoration interface

M U Chowdhury1, K Kobayashi, Y Uchiyama

  • 1Department of Crown and Bridge Prosthodontics, Hokkaido University School of Dentistry, Sapporo, Japan.

Asian Journal of Aesthetic Dentistry
|January 1, 1995
PubMed
Summary
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This study evaluated composite resins for posterior teeth restoration, comparing their wear rates to enamel. Results indicate good marginal integrity and transition, despite no direct correlation in wear between opposing surfaces.

Area of Science:

  • Restorative Dentistry
  • Dental Biomaterials
  • Biocompatibility and Wear Analysis

Background:

  • Aesthetic restorative dental materials like composite resin, porcelain, and castable ceramics are standard for posterior teeth.
  • A key goal is achieving wear rates comparable to natural tooth enamel for longevity.
  • Understanding wear at the enamel-restoration interface is crucial for clinical success.

Purpose of the Study:

  • To assess the wear behavior of direct and indirect composite resins against enamel.
  • To evaluate the integrity and transition at the enamel-restoration interface under simulated attrition.

Main Methods:

  • Utilized various direct and indirect composite resin materials for restorations.
  • Simulated attrition at the enamel-restoration interface.

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  • Performed quantitative wear analysis and Scanning Electron Microscopy (SEM) evaluation.

    • Main Results:

    • No significant correlation was found between the quantitative wear of opposing upper and lower specimens.
    • Excellent marginal integrity was observed in most specimens, with minimal step formation.
    • SEM analysis revealed diverse morphological characteristics on the worn surfaces.

    Conclusions:

    • The evaluated composite resins demonstrate satisfactory marginal adaptation and transition against enamel.
    • The findings suggest potential for these materials in posterior restorations, though wear correlation needs further study.
    • SEM provides insights into the wear mechanisms at the enamel-restoration interface.