Restorative Dentistry & Endodontics

Research Article

Effects of a bleaching agent on properties of commercial glass-ionomer cements: Fernanda Lúcia Lago de Camargo, Ailla Carla Lancellotti, Adriano Fonseca de Lima, Vinícius Rangel Geraldo Martins, Luciano de Souza Gonçalves; Restor Dent Endod 2018;43(3):e32. Published online July 5, 2018; DOI: https://doi.org/10.5395/rde.2018.43.e32

Objectives

This study evaluated the effects of a bleaching agent on the composition, mechanical properties, and surface topography of 6 conventional glass-ionomer cements (GICs) and one resin-modified GIC.

Materials and Methods

For 3 days, the specimens were subjected to three 20-minute applications of a 37% H₂O₂-based bleaching agent and evaluated for water uptake (WTK), weight loss (WL), compressive strength (CS), and Knoop hardness number (KHN). Changes in surface topography and chemical element distribution were also analyzed by energy-dispersive X-ray spectroscopy and scanning electron microscopy. For statistical evaluation, the Kruskal-Wallis and Wilcoxon paired tests (α = 0.05) were used to evaluate WTK and WL. CS specimens were subjected to 2-way analysis of variance (ANOVA) and the Tukey post hoc test (α = 0.05), and KH was evaluated by one-way ANOVA, the Holm-Sidak post hoc test (α = 0.05), and the t-test for independent samples (α = 0.05).

Results

The bleaching agent increased the WTK of Maxxion R, but did not affect the WL of any GICs. It had various effects on the CS, KHN, surface topography, and the chemical element distribution of the GICs.

Conclusions

The bleaching agent with 37% H₂O₂ affected the mechanical and surface properties of GICs. The extent of the changes seemed to be dependent on exposure time and cement composition.

Citations

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Multidisciplinary conservative management of a severely discolored nonvital tooth
Álvaro Ferrando Cascales, Francesc Abella Sans, Rubén Agustín-Panadero, José Amengual Lorenzo
The Journal of Prosthetic Dentistry.2025; 133(4): 941. CrossRef
Physical-mechanical, chemical and biological properties of graphene-reinforced glass ionomer cements
Tatiane Ramos dos Santos Jordão, Laura Soares Viana Fernandes, Karla Lorene de França Leite, Adílis Alexandria, Emmanuel João Nogueira Leal Silva, Lucianne Cople Maia, Tatiana Kelly da Silva Fidalgo
Restorative Dentistry & Endodontics.2024;[Epub] CrossRef
An In Vitro Exploration of Interaction Mechanisms of Intracoronal Bleaching on the Compressive Strength of Conventional and Calcium Silicate–Based Self‐Adhesive Resins and Their Bonding to Composite Resin Restorative Material
Fereshteh Shafiei, Paria Dehghanian, Shadi Tivay, Yasamin Ghahramani, Luca Testarelli
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Basic Researchs

Biocompatibility of experimental mixture of mineral trioxide aggregate and glass ionomer cement: Min-Jae Oh, Yu-Na Jeong, In-Ho Bae, So-Young Yang, Bum-Jun Park, Jeong-Tae Koh, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh; J Korean Acad Conserv Dent 2010;35(5):359-367. Published online September 30, 2010; DOI: https://doi.org/10.5395/JKACD.2010.35.5.359

Abstract PDF PubReader ePub

Objectives

The purpose of the present in vitro study was to evaluate the biocompatibility of mineral trioxide aggregate (MTA) mixed with glass ionomer cement (GIC), and to compare it with that of MTA, GIC, IRM and SuperEBA.

Materials and Methods

Experimental groups were divided into 3 groups such as 1 : 1, 2 : 1, and 1 : 2 groups depending on the mixing ratios of MTA powder and GIC powder. Instead of distilled water, GIC liquid was mixed with the powder. This study was carried out using MG-63 cells derived from human osteosarcoma. They were incubated for 1 day on the surfaces of disc samples and examined by scanning electron microscopy. To evaluate the cytotoxicity of test materials quantitatively, XTT assay was used. The cells were exposed to the extracts and incubated. Cell viability was recorded by measuring the optical density of each test well in reference to controls.

Results

The SEM revealed that elongated, dense, and almost confluent cells were observed in the cultures of MTA mixed with GIC, MTA and GIC. On the contrary, cells on the surface of IRM or SuperEBA were round in shape. In XTT assay, cell viability of MTA mixed with GIC group was similar to that of MTA or GIC at all time points. IRM and SuperEBA showed significantly lower cell viability than other groups at all time points (p < 0.05).

Conclusions

In this research MTA mixed with GIC showed similar cellular responses as MTA and GIC. It suggests that MTA mixed with GIC has good biocompatibility like MTA and GIC.

Citations

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In vitrocytotoxicity of four calcium silicate-based endodontic cements on human monocytes, a colorimetric MTT assay
Sedigheh Khedmat, Somayyeh Dehghan, Jamshid Hadjati, Farimah Masoumi, Mohammad Hossein Nekoofar, Paul Michael Howell Dummer
Restorative Dentistry & Endodontics.2014; 39(3): 149. CrossRef
Endodontic management of a maxillary lateral incisor with dens invaginatus and external root irregularity using cone-beam computed tomography
Young-Jun Lim, Sook-Hyun Nam, Sung-Ho Jung, Dong-Ryul Shin, Su-Jung Shin, Kyung-San Min
Restorative Dentistry & Endodontics.2012; 37(1): 50. CrossRef

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Physical and chemical properties of experimental mixture of mineral trioxide aggregate and glass ionomer cement: Yu-Na Jeong, So-Young Yang, Bum-Jun Park, Yeong-Joon Park, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh; J Korean Acad Conserv Dent 2010;35(5):344-352. Published online September 30, 2010; DOI: https://doi.org/10.5395/JKACD.2010.35.5.344

Abstract PDF PubReader ePub

Objectives

The purpose of this study was to determine the setting time, compressive strength, solubility, and pH of mineral trioxide aggregate (MTA) mixed with glass ionomer cement (GIC) and to compare these properties with those of MTA, GIC, IRM, and SuperEBA.

Materials and Methods

Setting time, compressive strength, and solubility were determined according to the ISO 9917 or 6876 method. The pH of the test materials was determined using a pH meter with specified electrode for solid specimen.

Results

The setting time of MTA mixed with GIC was significantly shorter than that of MTA. Compressive strength of MTA mixed with GIC was significantly lower than that of other materials at all time points for 7 days. Solubility of 1 : 1 and 2 : 1 specimen from MTA mixed with GIC was significantly higher than that of other materials. Solubility of 1 : 2 specimen was similar to that of MTA. The pH of MTA mixed with GIC was 2-4 immediately after mixing and increased to 5-7 after 1 day.

Conclusions

The setting time of MTA mixed with GIC was improved compared with MTA. However, other properties such as compressive strength and pH proved to be inferior to those of MTA. To be clinically feasible, further investigation is necessary to find the proper mixing ratio in order to improve the drawbacks of MTA without impairing the pre-existing advantages and to assess the biocompatibility.

Citations

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Comparison of Setting Time, Compressive Strength, Solubility, and pH of Four Kinds of MTA
Jing-Ling Che, Jae-Hwan Kim, Seon-Mi Kim, Nam-ki Choi, Hyun-Joo Moon, Moon-Jin Hwang, Ho-Jun Song, Yeong-Joon Park
Korean Journal of Dental Materials.2016; 43(1): 61. CrossRef
Do conventional glass ionomer cements release more fluoride than resin-modified glass ionomer cements?
Maria Fernanda Costa Cabral, Roberto Luiz de Menezes Martinho, Manoel Valcácio Guedes-Neto, Maria Augusta Bessa Rebelo, Danielson Guedes Pontes, Flávia Cohen-Carneiro
Restorative Dentistry & Endodontics.2015; 40(3): 209. CrossRef
Synthesis and Properties of a New Dental Material Based on Nano‐Structured Highly Active Calcium Silicates and Calcium Carbonates
Vukoman Jokanović, Božana Čolović, Miodrag Mitrić, Dejan Marković, Bojana Ćetenović
International Journal of Applied Ceramic Technology.2014; 11(1): 57. CrossRef
Evaluation of the effect of blood contamination on the compressive strength of MTA modified with hydration accelerators
Kaveh Oloomi, Eshaghali Saberi, Hadi Mokhtari, Hamid Reza Mokhtari Zonouzi, Ali Nosrat, Mohammad Hossein Nekoofar, Paul Michael Howell Dummer
Restorative Dentistry & Endodontics.2013; 38(3): 128. CrossRef
Endodontic management of a maxillary lateral incisor with dens invaginatus and external root irregularity using cone-beam computed tomography
Young-Jun Lim, Sook-Hyun Nam, Sung-Ho Jung, Dong-Ryul Shin, Su-Jung Shin, Kyung-San Min
Restorative Dentistry & Endodontics.2012; 37(1): 50. CrossRef

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Original Article

Comparison of biocompatibility of four root perforation repair materials: Min-Kyung Kang, In-Ho Bae, Jeong-Tae Koh, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh; J Korean Acad Conserv Dent 2009;34(3):192-198. Published online May 31, 2009; DOI: https://doi.org/10.5395/JKACD.2009.34.3.192

Abstract PDF PubReader ePub

This study was carried out in order to determine in vitro biocompatibility of white mineral trioxide aggregate (MTA), and to compare it with that of the commonly used materials, i. e. calcium hydroxide liner (Dycal), glass ionomer cement (GIC), and Portland cement which has a similar composition of MTA. To assess the biocompatibility of each material, cytotoxicity was examined using MG-63 cells. The degree of cytotoxicity was evaluated by scanning electron microscopy (SEM) and a colorimetric method, based on reduction of the tetrazolium salt 2,3 bis {2methoxy 4nitro 5[(sulfenylamino) carbonyl] 2H tetrazolium hydroxide} (XTT) assay.

The results of SEM revealed the cells in contact with GIC, MTA, and Portland cement at 1 and 3 days were apparently healthy. In contrast, cells in the presence of Dycal appeared rounded and detached. In XTT assay, the cellular activities of the cells incubated with all the test materials except Dycal were similar, which corresponded with the SEM observation. The present study supports the view that MTA is a very biocompatible root perforation repair material. It also suggests that cellular response of Portland cement and GIC are very similar to that of MTA.

Citations

Citations to this article as recorded by

The effect of several root-end filling materials on MG63 osteoblast-like cells
Jeong-Ho Lee, Won-Jun Shon, WooCheol Lee, Seung-Ho Baek
Journal of Korean Academy of Conservative Dentistry.2010; 35(3): 222. CrossRef
Biocompatibility of experimental mixture of mineral trioxide aggregate and glass ionomer cement
Min-Jae Oh, Yu-Na Jeong, In-Ho Bae, So-Young Yang, Bum-Jun Park, Jeong-Tae Koh, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh
Journal of Korean Academy of Conservative Dentistry.2010; 35(5): 359. CrossRef
Physical and chemical properties of experimental mixture of mineral trioxide aggregate and glass ionomer cement
Yu-Na Jeong, So-Young Yang, Bum-Jun Park, Yeong-Joon Park, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh
Journal of Korean Academy of Conservative Dentistry.2010; 35(5): 344. CrossRef

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