Ion release by endodontic grade glass-ionomer cement

Czarnecka, Beata; Limanowska-Shaw, Honorata; Hatton, Richard; Nicholson, John
April 2007
Journal of Materials Science: Materials in Medicine;Apr2007, Vol. 18 Issue 4, p649
Academic Journal
Cylindrical specimens (6 mm high × 4 mm diameter) of the endodontic grade glass-ionomer (Ketac Endo) were exposed to various media for 1 week, after which changes in their mass, pH of storage medium, and ion release were determined. In water, this cement was shown to release reasonable amounts of sodium, aluminium and silicon, together with smaller amounts of calcium and phosphorus, as well as taking up 2.41% by mass of water. A comparison with the restorative grade materials (Ketac Molar, ex 3M ESPE and Fuji IX, ex GC) showed both ion release and water uptake to be greater. All three cements shifted pH from 7 to around 6 with no significant differences between them. Other storage media were found to alter the pattern of ion release. Lactic acid caused an increase, whereas both saturated calcium hydroxide and 0.6% sodium hypochlorite, caused decreases. This suppression of ion-release may be significant clinically. Aluminium is the most potentially hazardous of the ions involved but amounts released were low compared with levels previously reported to show biological damage.


Related Articles

  • Developments in Glass-lonomer Cements. Wilson, Alan D. // International Journal of Prosthodontics;Sep/Oct1989, Vol. 2 Issue 5, p438 

    The performance of glass-ionomer cements has been improved since their introduction, and many of the initial disadvantages have been overcome. This article reviews the development of glass-ionomer cements, the problems involved, their solution, and their relation to underlying scientific...

  • Microleakage of light-cured glass-ionomer restorative materials. Brackett, William W.; Gunnin, Timothy D.; Johnson, William W.; Conkin, J. Elaine // Quintessence International;Aug1995, Vol. 26 Issue 8, p583 

    The microleakage of three glass-ionomer restorative materials, one chemically cured and two light cured, was evaluated. Ten restorations of each material were placed, according to manufacturer's instructions, in Class V cavities in bovine incisors. All cavities were prepared with 90-degree...

  • The Effect of Additives on the Setting Properties of a Glass-Ionomer Cement. PROSSER, H. J.; JEROME, S. M.; WILSON, A. D. // Journal of Dental Research;Oct1982, Vol. 61 Issue 10, p1195 

    Studies of the setting behavior of glass ionomer cements formed from either glass powders and polyacid solutions or from glass-dry polyacid blends mixed with water have been carried out using an oscillating rheometer. Certain acids accelerate the setting rate, but none is as effective as...

  • Residual Monomer/Additive Release and Variability in Cytotoxicity of Light-curing Glass-ionomer Cements and Compomers. Geurtsen, W.; Spahl, W.; Leyhausen, G. // Journal of Dental Research;Dec1998, Vol. 77 Issue 12, p2012 

    In previous studies, light-cured glass-ionomer cements have been shown to evoke cytotoxic reactions. It was the purpose of this investigation (a) to determine the nature of the ingredients released into an aqueous medium from 2 light-cured glass-ionomer cements (GICs) and 3 compomers; (b) to...

  • The role of glass composition in the behaviour of glass acetic acid and glass lactic acid cements. Shahid, Saroash; Billington, R. W.; Pearson, G. J. // Journal of Materials Science: Materials in Medicine;Feb2008, Vol. 19 Issue 2, p541 

    Cements have recently been described, made from glass ionomer glass reacted with acetic and lactic acid instead of polymeric carboxylic acid. From their behaviour a theory relating to a possible secondary setting mechanism of glass ionomer has been adduced. However, only one glass (G338) was...

  • The in vitro effect of glass-ionomer cement restoration on enamel subjected to a demineralization and remineralization model. Serra, Mônica Campos; Cury, Jairne Aparecido // Quintessence International;Feb1992, Vol. 23 Issue 2, p143 

    The purpose of this in vitro study was to evaluate differences in initiation and progression of carieslike lesion s around restorations in enamel. A demineralization/remineralization cycling model was used to induce experimental secondary caries around cavities restored with glass-ionomer cement...

  • Marginal seal of a resin-modified glass-ionomer restorative material: An investigation of placement techniques. Köprülü, Hülya; Gürgan, Sevil; Önen, Alev // Quintessence International;Oct1995, Vol. 26 Issue 10, p729 

    This study examined marginal seal of a visible resin-modified glass-ionomer restorative material. Class V cavity preparations in extracted human premolars were restored with one of four different placement techniques: bulk placement, vertical incremental placement, incremental placement with the...

  • Clinical evaluation of resin-modified glass-ionomer restorative cements in cervical 'abrasion' lesions: One-year results. Maneenut, Chaiwat; Tyas, Martin J. // Quintessence International;Oct1995, Vol. 26 Issue 10, p739 

    Sixty non-undercut Class V "abrasion" lesions in 13 patients were restored with light-cured Type IIa glass-ionomer cements in accordance with the manufacturer's instructions, 20 each with Fuji II LC, Photac-Fil, and Vitremer. Patients were recalled for examination and photographs 1 week, 6...

  • Resin-Modified Glass-Ionomer Cements. Wilson, Alan D. // International Journal of Prosthodontics;Sep/Oct1990, Vol. 3 Issue 5, p425 

    The recently developed dual-setting resin glass-ionomer cements are discussed, and the question of whether they are the true glass-ionomer cements is addressed. Their chemistry and properties are examined and compared with conventional glass-ionomer cements. Resin-modified glass-ionomer cements...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics