A Comparative Evaluation of Microleakage of Glass Ionomer Cement and Chitosan-modified Glass Ionomer Cement: An in vitro Study

Abstract

Objective: To do a comparative study of microleakage of glass ionomer cement (GIC) and chitosan modified glass ionomer cement and evaluate which exhibited lesser microleakage.Materials and methods: Sixty freshly extracted sound primary molar teeth were obtained. Two groups of samples were created for the study which comprised of group I (glass ionomer cement—GIC) and group II (Chitosan modified glass ionomer cement). Class V cavities were prepared on the buccal surfaces. All the tooth surfaces except the restoration and a 1 mm zone adjacent to its margins were covered with two coats of varnish. The specimens were then immersed in 2% basic fuschin dye solution for 24 hours. The teeth were sectioned into two halves buccolingually in an occlusoapical direction. Sections were viewed under stereomicroscope and the degree of microleakage was evaluated using specific scoring criteria. For comparative evaluation of microleakage scores between glass ionomer cement and chitosan modified cement, a nonparametric Mann-Whitney statistical analysis was done.Results: Statistical analysis showed no significant differences between groups I and II with the p-value at >0.05.Conclusion: Chitosan modified GIC holds great promise for general dentistry as a future restorative material with microleakage properties similar to or better than GIC.How to cite this article: Abraham D, Thomas AM, Chopra S, Koshy S. A Comparative Evaluation of Microleakage of Glass Ionomer Cement and Chitosan-modified Glass Ionomer Cement: An in vitro Study. Int J Clin Pediatr Dent 2014;7(1):6-10.

A Comparative Evaluation of Mechanical Properties of Four Different Restorative Materials: An In Vitro Study

“…Hence, when the choice of restorative materials is made, certain properties should be considered, such as adhesion to the tooth structure, load-bearing strength of the materials, biocompatibility retention, and simplicity of application. 1 For posterior restorations, the materials have to withstand forces of compression and tension. From the earlier materials like silver amalgam to latest advances in composites, posterior restorative materials have been constantly evolving.…”

Propiedades y aplicación clínica de los ionómeros de vidrio de alta densidad disponibles en Lima-Perú

“…Los IV de alta densidad son utilizados en la técnica restaurativa atraumática (TRA) de eliminación manual de caries 2,23 , la Organización Mundial de la Salud (OMS) en 1994 reconoce el TRA como un nuevo enfoque para el tratamiento dental en regiones económicamente menos favorecidas 21 . También, se pueden emplear los ionómeros como materiales restauradores de larga duración especialmente, en la dentición primaria, como revestimientos y bases, como selladores de presión y como agentes de unión para brackets de ortodoncia 18 .…”

“…Uno de los principales inconvenientes de los ionómeros de vidrio son sus propiedades mecánicas débiles como: la tenacidad, la fragilidad y la baja resistencia a la compresión, por lo que se han investigado materiales de relleno alternativo 9 . A principios de la década de 1990, se desarrollaron los cementos de IV de alta viscosidad o densidad, como materiales de obturación en la técnica de terapia restaurativa atraumática (TRA); deseables debido a sus propiedades únicas de fraguado más rápido, resistencia adecuada y pulible en una sola cita, aunque las resinas siguen siendo superiores en cuanto a resistencia a la fractura 21 . Se puede definir a los ionómeros de alta densidad como ionómeros convencionales cuyos vidrios han sido mejorados 6 ; donde el Calcio (Ca) ha sido reemplazado por Estroncio (Sr) e incluso, Zirconio (Zr) 21 , logrando propiedades físicas superiores al optimizar la distribución del tamaño de sus partículas y poliácidos, lo que resulta en una matriz con alta reticulación 1 .…”

Chitosan Biomaterials for Current and Potential Dental Applications

“…These include the works of Petri et al [ 156 ] who came up with much-improved values of the flexural strength of GICs post addition of chitosan with the added benefit of increasing the rate at which fluoride ions leached from the set material ( Table 2 ). In addition, small volumes of CHS added to GICs (10% w/v) impart no adverse effects towards their performance in terms of microleakage, which paves the way for it to be a viable and promising candidate as an additive to GICs [ 157 ].…”