Original scientific paper
https://doi.org/10.15644/asc53/2/4
Mechanical Properties of High Viscosity Glass Ionomer and Glass Hybrid Restorative Materials
Ivan Šalinović
; 6th year students, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Matea Stunja
; 6th year students, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Zdravko Schauper
; Department of Materials, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Željko Verzak
; Zavod za dječju i preventivnu stomatologiju Stomatološkog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
Ana Ivanišević Malčić
; Department of Endodontics and Restorative Dentistry, School of Dentistry, University of Zagreb, Zagreb, Croatia
Valentina Brzović Rajić
; Department of Endodontics and Restorative Dentistry, School of Dentistry, University of Zagreb, Zagreb, Croatia
Abstract
Objectives: to determine the mechanical properties of hybrid and high-viscosity glass ionomer cements. Compressive strength and hardness of three glass ionomer cements (GIC) were measured: Ketac ™ Universal Aplicap ™, EQUIA Fil® and EQUIA FORTE Fil®, and the SEM sample analysis were performed. Material and Methods: The samples for measuring the compressive strength were prepared using silicone molds with standard dimensions of 6 mm x 4 mm and stored in deionized water for five days, while the samples for hardness measurement were prepared using Teflon molds with a cylindrical opening in the middle, dimensions 2 mm in height and 5 mm in width. For each material, one sample was made (n = 1) and stored in deionized water at 37ºC for 25 days. A representative sample of each material was analyzed using SEM. For the comparison of obtained values, the ANOVA test was used, while Tukey test was used for the multiple comparison. Results: There were no significant differences between the compressive strength of the three tested materials (p <0.05). The hardness values were: 157 HV0,2 for Ketac ™ Universal Aplicap ™ , 47 HV0,2 for EQUIA Fil® and 39 HV0,2 for EQUIA FORTE Fil®, respectively, and were significantly different, implying that Ketac ™ Universal Aplicap ™ has much higher hardness values than the other materials tested. SEM sample analysis
revealed similar fracture modes of the tested materials. Conclusion: It was concluded that there were no statistically significant differences in compressive strength and fracture modes between the tested materials, while Ketac ™ Universal Aplicap ™ hardness results were significantly higher than the ones measured for EQUIA Fil® and EQUIA FORTE Fil®.
Keywords
Glass Ionomer Cement; Compressive Strength; Hardness; SEM.
Hrčak ID:
220898
URI
Publication date:
10.6.2019.
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