Comparison of Microhardness and Compressive Strength of Alkasiteand Conventional Restorative Materials
10.5933/JKAPD.2020.47.3.320
- Author:
Kunho LEE
1
;
Jongsoo KIM
;
Jisun SHIN
;
Miran HAN
Author Information
1. Department of Pediatric Dentistry, College of Dentistry, Dankook University, Cheonan, Korea
- Publication Type:Original Article
- From:
Journal of Korean Academy of Pediatric Dentistry
2020;47(3):320-326
- CountryRepublic of Korea
- Language:Korean
-
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.
