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Limited evidence exists that glass ionomer restorations in permanent teeth offer a lower risk of developing carious lesions at margins compared with amalgam restorations

Carlos Flores-Mir, DDS, DSc, FRCD(C); Mike John, DDS, MPH, PhD; Debora Matthews DDS, MSC .


Systematic Review Conclusion

Carious lesions are less common at the margins of single-surface glass ionomer restorations than at the margins of amalgam restorations after restorations have been in permanent teeth for six years.

Critical Summary Assessment

The authors of a systematic review of eight studies found glass ionomer restorations to have a substantial effect in preventing secondary caries compared with amalgam restorations.

Evidence Quality Rating

Limited Evidence

This summary is published in the Journal of the American Dental Association and can be accessed at:

Critical Summary Publication Date:


These summaries are not intended to, and do not, express, imply, or summarize standards of care, but rather provide a concise reference for dentists to aid in understanding and applying evidence from the referenced systematic review in making clinically sound decisions as guided by their clinical judgment and by patient needs. American Dental Association © 2019