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Aluminium release from glass ionomer cements during early water exposure in vitro | JoVE Visualize

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Aluminium release from glass ionomer cements during early water exposure in vitro

O H Andersson¹, J E Dahl

¹NIOM, Scandinavian Institute of Dental Materials, Haslum, Norway.

Biomaterials|September 1, 1994

View abstract on PubMed

Summary

Glass ionomer cements release significant aluminium, especially auto-cured types, potentially inhibiting pulp mineralization. This aluminium release may explain reduced predentin mineralization under dental fillings.

Area of Science:

Dental Materials Science
Biomaterials Science
Cariology

Background:

Aluminium is a key component in glass ionomer cements (GICs).
During GIC setting, aluminium ions are released into the polyalkenoic acid solution.
Unbound aluminium may leach from the cement matrix into the surrounding environment.

Purpose of the Study:

To investigate aluminium release from auto-cured and light-cured GICs during early water exposure.
To correlate aluminium release with microstructural changes in the GIC matrix.
To explore the implications of aluminium release on pulpal responses.

Main Methods:

Quantification of aluminium ion release from GICs exposed to water.
Scanning electron microscopy (SEM) to assess the structural integrity of the cement matrix.
Comparison of aluminium release and matrix degradation between auto-cured and light-cured GICs.

Main Results:

Auto-cured GICs exhibited higher aluminium release compared to light-cured GICs.
SEM revealed significant polymer matrix loss in GICs with substantial aluminium release.
Insufficient curing in light-cured GICs also led to matrix degradation.

Conclusions:

The substantial early release of aluminium from GICs may contribute to the observed lack of predentin mineralization in the pulp.
Aluminium's inhibitory effect on mineralization, similar to its effect on bone, is a potential mechanism.
Understanding aluminium ion release is crucial for developing GICs with improved biocompatibility and pulpal interaction.

Materials Engineering

Aluminium Release From Glass Ionomer Cements During Early Water Exposure In Vitro