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Related Experiment Videos

Secondary caries around amalgam restorations

L A Pimenta1, M F Navarro, A Consolaro

  • 1Department of Restorative Dentistry, University of Campinas, Dentistry School of Piracicaba, Piracicaba, Brazil.

The Journal of Prosthetic Dentistry
|September 1, 1995
PubMed
Summary

Marginal defects in amalgam restorations are linked to secondary caries, but statistical analysis indicates they are insufficient on their own to determine caries development around the restoration.

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Area of Science:

  • Dental Materials Science
  • Cariology
  • Restorative Dentistry

Background:

  • Secondary caries is a primary reason for replacing amalgam restorations.
  • Marginal integrity of dental restorations is crucial for longevity.
  • Understanding factors contributing to secondary caries is essential for clinical practice.

Purpose of the Study:

  • To investigate if marginal defects (ditching) in Class I amalgam restorations influence secondary caries formation.
  • To compare the prevalence of caries adjacent to ditched versus sound margins within the same oral environment.

Main Methods:

  • Fifty-five extracted premolars and molars with Class I amalgam restorations were examined.
  • Macroscopic and microscopic examinations were performed on sections through ditched and sound margins.

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  • Teeth were exposed to the same oral environment to control for external factors.

    • Main Results:

    • Macroscopic examination showed caries prevalence of 3.6% for nonditched margins and 20% for ditched margins.
    • Microscopic examination revealed caries prevalence of 47.06% for nonditched margins and 58.82% for ditched margins.
    • Statistical analysis indicated a higher prevalence of caries adjacent to ditched margins.

    Conclusions:

    • While marginal defects are associated with a higher incidence of secondary caries, they are not solely determinative.
    • Other factors likely contribute to the development of secondary caries surrounding amalgam restorations.
    • Further research is needed to identify all contributing factors to secondary caries around occlusal amalgam restorations.