1Dept. of Conservative Dentistry and Endodontics, Dentopia Denal Clinic, Noida, Uttar Pradesh, India
2Dept. of Conservative Dentistry and Endodontics, Dentopia Denal Clinic, Noida, Uttar Pradesh, India
3Private Practitioner, Dentopia Denal Clinic, Noida, Uttar Pradesh, India
*Corresponding Author: Email: sreevatsanr32@gmail.com
Online published on 3 January, 2019.
Aim of this study was to evaluate microhardness of of a relatively new material Giomer as compared to other commonly used resin based restoratives; Compomer, Hybrid Composite and Resin modified glass ionomer (RMGIC).
Ten sample discs were made from each of the four restorative materials using stainless steel moulds. The surface microhardness of the Giomer, Compomer, Hybrid Composite and RMGIC were measured on each side using a Vicker's microhardness tester at a magnification 500X. A 100g load with a holding time of 15 seconds was used for all the samples. The size of the indentations was used to measure the microhardness of the test materials.
The data was analysed using the one-way ANOVA (Analysis of variance) test. The result is considered statistically significant if the ‘p’ value obtained is <0.05 level of significance.
The microhardness of all the four materials differed significantly from each other (p<0.001). The highest value was given by Giomer which was significantly harder than Hybrid Composite which in turn was significantly harder when compared to RMGIC. The Compomer showed the lowest value among the four test materials.
The order of hardness from highest to lowest is as follows: Giomer> Composite> RMGIC> Compomer.
Giomer, Resin based restorative materials, Vicker's Hardness Test
