Expiration Date Effect on Mechanical and Chemical Properties of Glass Ionomer Cements

ABSTRACT: The glass ionomer cements (GICs) is a generic name given to a group of materials widely used in clinical dentistry which if used after the specified expiration date, material properties may be affected. to evaluate the Vick ers microhardness, surface morphology and the energy dispersive X-ray microanalysis (EDX), of GICs with different expiration dates that were stored at room temperature. specimens of highly viscous glass ionomer cement (HVGIC) (Ketac Cem and Ketac Molar) and resin-modified glass ionomer cement (RMGIC) (Vitrebond) with different expiration dates (current, close to their expiration and expired) were prepared for Vickers microhardness test and scanning electronic microscopy (SEM) with EDX, measuring 5 mm in diameter and 2 mm length, per the manufacturer&#8217;s instructions, in standard cylindrical teflon molds. For the comparison of obtained values, the ANOVA test was used, while Tukey test was used for the multiple comparisons. In all the GICs used, the microhardness decreased as the expiration date approached, finding a significant statistical differen ce (P<0.05) in Ketac Molar and Vitrebond. SEM sample analysis revealed similar cohesive cracks in all tested materials. The EDX analysis revealed the presence of the elements F, Al and Si in all GICs and Ca only in Ketac Molar and Ketac Cem. The elements were found in a higher atomic percentage in the GICs with an current date and in a lower percentage in those with an expired date. HVGIC and RMGIC with an expiration date finish and that were stored at room temperature, suffer significant physical and chemical changes, which could put doubts its clinical effectiveness.

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Main Authors: Zavala-Alonso,V, Jerónimo-Prieto,R, Ramírez-González,J, Romo-Ramírez,G, Goldaracena-Azuara,M, Ochoa-Monreal,C
Format: Digital revista
Language:English
Published: Universidad de La Frontera. Facultad de Medicina 2021
Online Access:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-381X2021000200513
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spelling oai:scielo:S0718-381X20210002005132021-06-08Expiration Date Effect on Mechanical and Chemical Properties of Glass Ionomer CementsZavala-Alonso,VJerónimo-Prieto,RRamírez-González,JRomo-Ramírez,GGoldaracena-Azuara,MOchoa-Monreal,C glass ionomer cements expiration date mechanical and chemical properties Vickers micro-hardness scanning electron microscopy energy dispersive X-ray microanalysis ABSTRACT: The glass ionomer cements (GICs) is a generic name given to a group of materials widely used in clinical dentistry which if used after the specified expiration date, material properties may be affected. to evaluate the Vick ers microhardness, surface morphology and the energy dispersive X-ray microanalysis (EDX), of GICs with different expiration dates that were stored at room temperature. specimens of highly viscous glass ionomer cement (HVGIC) (Ketac Cem and Ketac Molar) and resin-modified glass ionomer cement (RMGIC) (Vitrebond) with different expiration dates (current, close to their expiration and expired) were prepared for Vickers microhardness test and scanning electronic microscopy (SEM) with EDX, measuring 5 mm in diameter and 2 mm length, per the manufacturer&#8217;s instructions, in standard cylindrical teflon molds. For the comparison of obtained values, the ANOVA test was used, while Tukey test was used for the multiple comparisons. In all the GICs used, the microhardness decreased as the expiration date approached, finding a significant statistical differen ce (P<0.05) in Ketac Molar and Vitrebond. SEM sample analysis revealed similar cohesive cracks in all tested materials. The EDX analysis revealed the presence of the elements F, Al and Si in all GICs and Ca only in Ketac Molar and Ketac Cem. The elements were found in a higher atomic percentage in the GICs with an current date and in a lower percentage in those with an expired date. HVGIC and RMGIC with an expiration date finish and that were stored at room temperature, suffer significant physical and chemical changes, which could put doubts its clinical effectiveness.info:eu-repo/semantics/openAccessUniversidad de La Frontera. Facultad de MedicinaInternational journal of odontostomatology v.15 n.2 20212021-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-381X2021000200513en10.4067/S0718-381X2021000200513
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language English
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author Zavala-Alonso,V
Jerónimo-Prieto,R
Ramírez-González,J
Romo-Ramírez,G
Goldaracena-Azuara,M
Ochoa-Monreal,C
spellingShingle Zavala-Alonso,V
Jerónimo-Prieto,R
Ramírez-González,J
Romo-Ramírez,G
Goldaracena-Azuara,M
Ochoa-Monreal,C
Expiration Date Effect on Mechanical and Chemical Properties of Glass Ionomer Cements
author_facet Zavala-Alonso,V
Jerónimo-Prieto,R
Ramírez-González,J
Romo-Ramírez,G
Goldaracena-Azuara,M
Ochoa-Monreal,C
author_sort Zavala-Alonso,V
title Expiration Date Effect on Mechanical and Chemical Properties of Glass Ionomer Cements
title_short Expiration Date Effect on Mechanical and Chemical Properties of Glass Ionomer Cements
title_full Expiration Date Effect on Mechanical and Chemical Properties of Glass Ionomer Cements
title_fullStr Expiration Date Effect on Mechanical and Chemical Properties of Glass Ionomer Cements
title_full_unstemmed Expiration Date Effect on Mechanical and Chemical Properties of Glass Ionomer Cements
title_sort expiration date effect on mechanical and chemical properties of glass ionomer cements
description ABSTRACT: The glass ionomer cements (GICs) is a generic name given to a group of materials widely used in clinical dentistry which if used after the specified expiration date, material properties may be affected. to evaluate the Vick ers microhardness, surface morphology and the energy dispersive X-ray microanalysis (EDX), of GICs with different expiration dates that were stored at room temperature. specimens of highly viscous glass ionomer cement (HVGIC) (Ketac Cem and Ketac Molar) and resin-modified glass ionomer cement (RMGIC) (Vitrebond) with different expiration dates (current, close to their expiration and expired) were prepared for Vickers microhardness test and scanning electronic microscopy (SEM) with EDX, measuring 5 mm in diameter and 2 mm length, per the manufacturer&#8217;s instructions, in standard cylindrical teflon molds. For the comparison of obtained values, the ANOVA test was used, while Tukey test was used for the multiple comparisons. In all the GICs used, the microhardness decreased as the expiration date approached, finding a significant statistical differen ce (P<0.05) in Ketac Molar and Vitrebond. SEM sample analysis revealed similar cohesive cracks in all tested materials. The EDX analysis revealed the presence of the elements F, Al and Si in all GICs and Ca only in Ketac Molar and Ketac Cem. The elements were found in a higher atomic percentage in the GICs with an current date and in a lower percentage in those with an expired date. HVGIC and RMGIC with an expiration date finish and that were stored at room temperature, suffer significant physical and chemical changes, which could put doubts its clinical effectiveness.
publisher Universidad de La Frontera. Facultad de Medicina
publishDate 2021
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-381X2021000200513
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