PARTICLE SIZE VARIATIONS IN THE GLASS COMPONENT OF GLASS-IONOMER DENTAL CEMENTS

Authors

  • Kefi Iqbal

Abstract

Background: Glass polyalkenoate cements (glass ionomer cements) are widely used in restorativedentistry and now a day the material of choice for bone cements. The aim of the study is toexamine the variations produced by exposure to acid for dental Glass Ionomer Cement (GIC) glassparticles of different composition. It also involves the study of the effect of replacing Ca by Sr inglass ionomer glasses on the particle size distribution. Methods: This study was carried out in aMalvern Mastersizer/E. This uses LASER-diffraction and was in reverse-Fourier mode (0.1–80µm). Ultrasound was used to break up any agglomerates. Also, some samples were treated asabove but instead of particle size analyser, the slurries were centrifuged and the glass washed anddried to constant weight to determine mass loss. Results: The mass loss for LG26Sr in acidwashing was comparatively greater whereas LG26 showed less mass loss. When statisticallyevaluated LG series and AH2 were found to differ significantly p=0.008. There was, however, nosignificant difference between other combinations of glasses in acid was treatment. The pseudocement formation in all the glasses suffered significant mass loss p=<0.008. Conclusion: Bychanging the different chemical composition of glass ionomer glasses the mass loss wassubstantially greater during the cement formation process as compare to acid washing.Keywords: Glass ionomer cement, Components of glass ionomer cement, Restorative material,Luting material.

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Published

2012-06-01