Material guide

Resin-Modified Glass Ionomer

By the Dental Nation clinical team — a licensed dental group practising in the UAE

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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What is resin-modified glass ionomer used for?

Bonding approaches studied with resin-modified glass ionomer
Approach	Finding
Self-etch adhesive	Produced greater composite bond strength than total-etch adhesive in the sandwich technique.^[1][2]
Total-etch adhesive	Was 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
Timing	Bond-strength result
Primer on unset glass ionomer	Higher bond strength than primer on set glass ionomer.^[1][2]
Self-etch adhesive over uncured resin-modified glass ionomer	Better 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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Quick facts

Bonding method: Self-etch adhesives produced greater composite bond strength than total-etch adhesives in the sandwich technique.^[1][2]
Primer timing: Primer on unset glass ionomer produced higher bond strength than primer on set material.^[1][2]
Compared liners: Resin-modified glass ionomer had higher shear bond strength than MTA, Biodentine, and TheraCal LC.^[1][2]

This page provides general dental information. It cannot diagnose a condition or replace an examination by a licensed dental professional. In a UAE medical emergency, call 998.

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Who wrote this page

This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.

This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.