Microleakage of new glass ionomer restorative materials in permanent teeth

Authors:

ABSTRACT

Aim

The aim of this in vitro study was to evaluate the microleakage of the new glass ionomers ChemFil Rock and IonoluxAC
in comparison to Fuji IX GP Extra and the composite Aelite LS Posterior in permanent teeth.

Methods

Class V
standardised U-shaped cavities were made on a total of 40 freshly extracted teeth and restored with different glass ionomer materials (4
groups of 10 samples each). After thermocycling, the teeth were immersed in 0.5 basic fuchsin for 24h. They were then
sectioned in the buccolingual direction. Microleakage was assessed for the occlusal and gingival margins under a microscope at 40x
magnification.

Results

There were significant differences among the materials used (p=0.000). While there was no dye penetration
in the Fuji IX GP EXTRA group, which behaved similarly to the composite resin group, ChemFil Rock showed less microleakage than
Ionolux AC. The Wilcoxon rank test showed no significant differences in the occlusal and gingival scores between the groups
(p>0.05).

Conclusion

Although cavities filled with a conventional glass ionomer (Fuji IX GP Extra) had significantly less leakage
than cavities filled with the new glass ionomers (ChemFil Rock and Ionolux AC), these results do not reflect all the variables present in
vivo conditions. As the in vitro evaluation of new materials does not always reveal their full limitations or possibilities, clinical testing of
new systems remains the ultimate proof of effectiveness.

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