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Related Experiment Videos

A 5-year study comparing a posterior composite resin and an amalgam.

R D Norman1, J S Wright, R J Rydberg

  • 1Department of Restorative Dentistry, Southern Illinois University, School of Dental Medicine, Alton.

The Journal of Prosthetic Dentistry
|November 1, 1990
PubMed
Summary

This 5-year study found both composite resin and amalgam dental restorations satisfactory. Amalgam showed poorer marginal integrity, while composite resin experienced greater wear.

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Area of Science:

  • Restorative Dentistry
  • Dental Materials Science

Background:

  • Dental restorations are crucial for tooth function and aesthetics.
  • Composite resins and amalgam have been widely used for posterior restorations.
  • Long-term clinical performance data is essential for material selection.

Purpose of the Study:

  • To compare the 5-year clinical performance of light-cured posterior composite resin restorations versus amalgam restorations.
  • To identify significant differences in durability and integrity between the two restorative materials.

Main Methods:

  • A clinical study involving 80 class I and II light-cured posterior composite resin restorations.
  • Comparison with 43 class I and II amalgam restorations over a 5-year period.
  • Evaluation of marginal integrity and wear rate as key performance indicators.

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Main Results:

  • Both composite resin and amalgam restorations demonstrated satisfactory clinical performance over 5 years.
  • Amalgam restorations exhibited significantly poorer marginal integrity compared to composite resin.
  • Composite resin restorations showed a significantly greater wear rate than amalgam restorations.

Conclusions:

  • Both light-cured composite resin and amalgam are viable materials for posterior dental restorations with satisfactory 5-year outcomes.
  • Clinicians should consider the trade-offs: amalgam's marginal integrity versus composite resin's wear rate when selecting materials.