Strontium-based glasses

Calcium-Strontium-Based Glasses/Electrolytes Interfaces... 

Barium-Magnesium-Strontium-Based Glasses/Electrolyte Interface... 

There is bound to be one problem with resin glass polyalkenoate cement. Because the matrix is a mixture of hydrogel salt and polymer, lightscattering is bound to be greater than in the conventional material. Moreover, the zinc oxide-containing glass of class II materials is bound to be opaque. This makes it difficult to formulate a translucent material and is the reason why their use is restricted to that of a liner or base. However, the class II material cited will be radio-opaque because it uses strontium and zinc, rather than calcium, in the glass. 

The potential of ultrasonic extraction for field-based extractions has been put into use in the industrial hygiene and environmental single-element analysis of, for example, lead from glass fibre filter ambient air samples [13,14] or from lead-based paint, urban dust and river sediment [15] hexavalent chromium from coal fly ash and paint chips [16] and strontium from river sediment [17]. Ultrasonic extraction has also proved effective as a prior step in multi-element determinations of heavy metals. 

The only ones that have so far found practical application in glass-ionomers for dentistry are alumino-silicate glasses, with fluoride and phosphate additions. These are typically calcium based, with some extra sodium, though successful commercial materials exist in which calcium has been wholly or partly replaced by strontium. 

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