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http://dx.doi.org/10.5933/JKAPD.2020.47.3.320

Comparison of Microhardness and Compressive Strength of Alkasite and Conventional Restorative Materials  

Lee, Kunho (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Kim, Jongsoo (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Shin, Jisun (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Han, Miran (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Publication Information
Journal of the korean academy of Pediatric Dentistry / v.47, no.3, 2020 , pp. 320-326 More about this Journal
Abstract
The aim of this study was to compare compressive strength and microhardness of recently introduced alkasite restorative materials with glass ionomer cement and flowable composite resin. For each material, 20 samples were prepared respectively for compressive strength and Vickers microhardness test. The compressive strength was measured with universal testing machine at crosshead speed of 1 mm/min. And microhardness was measured using Vickers Micro hardness testing machine under 500 g load and 10 seconds dwelling time at 1 hour, 1 day, 7 days, 14 days, 21 days and 35 days. The compressive strength was highest in composite resin, followed by alkasite, and glass ionomer cement. In microhardness test, composite resin, which had no change throughout experimental periods, showed highest microhardness in 1 hour, 1 day, and 7 days measurement. The glass ionomer cement showed increase in microhardness for 7 days and no difference was found with composite resin after 14 days measurement. For alkasite, maximum microhardness was measured on 14 days, but showed gradual decrease.
Keywords
Alkasite; Composite resin; Glass ionomer cement; Compressive strength; Microhardness;
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