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

  • Journal of the Korean academy of pediatric dentistry
  • Abbr : J Korean Acad Pediatr Dent
  • 2020, 47(3), pp.320-326
  • DOI : 10.5933/JKAPD.2020.47.3.320
  • Publisher : The Korean Academy Of Pediatric Dentistry
  • Research Area : Medicine and Pharmacy > Dentistry
  • Received : April 8, 2020
  • Accepted : May 9, 2020
  • Published : August 31, 2020

Kunho Lee 1 Jong-Soo Kim ORD ID 2 JISUN SHIN ORD ID 2 HAN MI RAN ORD ID 2

1단국대학교 치과대학 소아치과학교실
2단국대학교

Accredited

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.

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