The ultrasonic setting of glass ionomer cements (GIC) was discussed. It was observed that the ultrasonic setting resulted in improvements of compressive strength. An increase in the PAA molecular weight from PAA50 to PAA200 resulted in an increase in the strength, but with a further increase in the PAA molecular weight to PAA450, there was a reduction in the strength. Results show that the strength of the ultrasonically set materials after 1 day were close to the values for the 7 days chemically set samples.
E. Twomey et al., "Investigation into the Ultrasonic Setting of Glass Ionomer Cements : Part II Setting Times and Compressive Strengths," Journal of Materials Science, vol. 39, no. 14, pp. 4631 - 4632, Springer, Jul 2004.
The definitive version is available at https://doi.org/10.1023/B:JMSC.0000034158.69184.84
Chemical and Biochemical Engineering
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15 Jul 2004