Effect of Nano-filled Protective Coating on Microhardness and Wear Resistance of Glass-ionomer Cements
10.5933/JKAPD.2019.46.2.226
- Author:
Wonjeong RYU
1
;
Howon PARK
;
Juhyun LEE
;
Hyunwoo SEO
Author Information
1. Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University, Korea. pedo@gwnu.ac.kr
- Publication Type:Original Article
- Keywords:
Surface protection;
Glass ionomer cement;
Resin-modified glass ionomer cement;
Surface hardness;
Wear
- MeSH:
Adhesives;
Glass Ionomer Cements;
Hardness;
Hardness Tests;
Mastication;
Water
- From:
Journal of Korean Academy of Pediatric Dentistry
2019;46(2):226-232
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study was to investigate the effect of adding a protective coating on the microhardness and wear resistance of glass ionomer cements (GICs).Specimens were prepared from GIC and resin-modified GIC (RMGI), and divided into 3 groups based on surface protection: (1) no coating (NC), (2) Equia coat coating (EC), and (3) un-filled adhesive coating (AD). All specimens were then placed in distilled water for 24 h. Surface hardness (n = 10) was evaluated on a Vickers hardness testing machine. Wear resistance (n = 10) was evaluated after subjecting the specimen to thermocycling for 10,000 cycles using a chewing simulator. Data were analyzed using a one-way ANOVA and the Kruskal-Wallis test.Surface hardness was highest in the NC groups, followed by the EC and AD groups. The wear depth of GI + NC was significantly higher than that of all RMGI groups. EC did not significantly lower the wear depth compared to AD.Based on these results, it was concluded that although EC does not increase the surface microhardness of GIC, it can increase the wear resistance.
