A preliminary comparison of the mechanical properties of chemically cured and ultrasonically cured glass ionomer cements, using nano-indentation techniques

Biomaterials
M R TowlerR G Hill

Abstract

There is a requirement for a dental cement with properties comparable or superior to conventional glass ionomer cements (GICs) but with the command set properties of the resin-modified GICs. The objective of this work was to show that the application of ultrasound to conventional Fuji IX commercial glass ionomer cement imparts a command set, whilst improving the short-term surface mechanical properties. Nano-indentation techniques were employed to highlight the improvements in hardness and creep resistance imparted to the cement through the application of ultrasound. The instant set imparted by the application of ultrasound provides improved surface hardness and creep, particularly within the first 24 h after setting. The surface hardness of the chemically cured Fuji IX (176 M Pa) increased by an order of magnitude when set ultrasonically (2620 M Pa), whilst creep reduced to a negligible amount. Rapid setting allows for shorter chair time and an improved clinical technique, making restorations more convenient for both the patient and clinician.

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Citations

Aug 10, 2010·Clinical Oral Investigations·Amerigo CantoroMarco Ferrari
Apr 18, 2006·Journal of Materials Science. Materials in Medicine·D A TannerM R Towler
Mar 28, 2007·Journal of Materials Science. Materials in Medicine·C M CrowleyS Hampshire
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