Ion release by endodontic grade glass-ionomer cement
Czarnecka, Beata, Limanowska-Shaw, Honorata, Hatton, Richard and Nicholson, John W. (2007) Ion release by endodontic grade glass-ionomer cement. Journal of Materials Science: Materials in Medicine, 18 (4). pp. 649-652. ISSN 0957-4530 (Print) 1573-4838 (Online)Full text not available from this repository.
Cylindrical specimens (6 mm high x 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.
|Uncontrolled Keywords:||fluoride release, dental cements, differentiation, osteoblasts, invitro, ph|
|Subjects:||R Medicine > RK Dentistry|
Q Science > QD Chemistry
|School / Department / Research Groups:||School of Science|
School of Science > Department of Pharmaceutical, Chemical & Environmental Sciences
|Last Modified:||25 May 2012 14:15|
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