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Material guide

Resin-Modified Glass Ionomer

Self-etch adhesives produced stronger composite bonds to resin-modified glass ionomer than total-etch systems in sandwich restorations.

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The short answer

Resin-modified glass ionomer can sit beneath composite in a sandwich restoration, where the strength of their bond matters.

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Resin-Modified Glass Ionomer dental educational illustration

What is resin-modified glass ionomer used for?

Bonding approaches studied with resin-modified glass ionomer
ApproachFinding
Self-etch adhesiveProduced greater composite bond strength than total-etch adhesive in the sandwich technique.[1][2]
Total-etch adhesiveWas more technique-sensitive than the self-etch approach.[1][2]

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What bonding details matter?

Using a primer on unset glass ionomer achieved higher bond strength than applying it after the material had set.

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Timing choices reported in the sandwich technique
TimingBond-strength result
Primer on unset glass ionomerHigher bond strength than primer on set glass ionomer.[1][2]
Self-etch adhesive over uncured resin-modified glass ionomerBetter bond strength than application over cured material.[1][2]

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Where does it fit in a restoration?

The studied setting is a resin composite restoration with glass ionomer or resin-modified glass ionomer forming part of the sandwich technique.

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What materials were compared with it?

As a liner under resin composite restorations, resin-modified glass ionomer had higher shear bond strength than MTA, Biodentine, and TheraCal LC.

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What does the choice mean for the filling?

A sandwich restoration relies on the composite-to-liner bond, so adhesive type and whether the liner has cured can change the measured bond strength.

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What can happen at the bonded interface?

Studies of liner bonds reported cohesive failure most often, followed by adhesive failure; some resin-modified glass ionomer samples had mixed failure patterns.

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Frequently asked questions

Does curing the resin-modified glass ionomer change bonding?

In the reviewed sandwich-technique studies, applying self-etch adhesive over uncured resin-modified glass ionomer gave better bond strength than applying it over cured material.

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Keep reading

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