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A preliminary report on the effect of storage in water on the properties of commercial light-cured glass-ionomer cements
Two commercially available light-curable glass-ionomer cements, Vitrebond and XR-Ionomer, have been studied and their compressive strengths measured following storage under wet and dry conditions for varying lengths of time up to 3 months indicate that the properties of these particular light- cured cements change markedly on exposure to moisture.
Water sorption characteristics of resin-modified glass-ionomer cements.
Great weight increase and greater volumetric expansion were observed on long-term storage in artificial saliva than in distilled water, indicating rapid water loss from the desiccated cements.
The effect of curing regime on the release of hydroxyethyl methacrylate (HEMA) from resin-modified glass-ionomer cements.
This study investigated the effects of degree of cure and specimen maturation on the release of HEMA from four resin-modified glass-ionomer cements and found that under-curing Fuji Lining LC caused a significant increase in HEMA release and release from Fuji II LC was reduced by over-cured.
Influence of humidity on dimensional stability of a range of ion-leachable cements.
The dimensional changes of a variety of dental restorative materials, occurring during and after setting, were investigated and shrunkage of conventional glass-ionomer cements and two materials setting by an acid-base reaction were examined.
Moisture susceptibility of resin-modified glass-ionomer materials.
The uptake and release of fluoride by ion-leaching cements after exposure to toothpaste.
All the materials under test released significant amounts of fluoride and reacted positively to exposure to an external fluoride source and showed an enhanced uptake and release on repeated exposure to the external fluoride sources.
Long-term surface micro-hardness of resin-modified glass ionomers.
- W. Kanchanavasita, H. Anstice, G. Pearson
- Materials Science, MedicineJournal of dentistry
- 1 November 1998
The post-hardening reaction overcame the plasticising effect of water when RMGICs were stored in distilled water, and progressive and high water uptake of specimens stored in artificial saliva resulted in a decrease in their surface hardness.
Studies in the setting of polyelectrolyte materials
The effect on a water-activated glass poly (alkenoate) dental cement of replacing the water with methanol, 50/50 water/methanol or 50/50 water/HEMA has been studied. The presence of the organic…
Studies on the structure of light-cured Glass-ionomer cements
The behaviour of two commercial light-cured glass-polyalkenoate (“Glass-ionomer”) cements has been studied in terms of changes in strength following storage under various conditions. Unlike…
An in vitro investigation of a poly(vinyl phosphonic acid) based cement with four conventional glass-ionomer cements. Part 1: Flexural strength and fluoride release.
The acid used to form the cement could not be used to predict changes in cement strength behaviour with respect to time and its flexural strength at 90 days was comparable to that of HF and VF.