Preparation and evaluation of an experimental luting glass ionomer cement to be used in dentistry

被引:17
作者
Bertolini, M. J. [1 ]
Zaghete, M. A. [1 ]
Gimenes, R. [2 ]
Padovani, G. C. [3 ]
Cruz, C. A. S. [3 ]
机构
[1] UNESP Araraquara, Inst Quim, Ctr Multidisciplinar Desenvolvimento Mat Ceram, BR-14801970 Sao Paulo, Brazil
[2] Univ Fed Itajuba, Univ Fed Itajuba, Inst Ciencias Exatas, BR-3750903 Itajuba, MG, Brazil
[3] Univ Estadual Paulista, Fac Odontol Araraquara, Dept Dent Restauradora, BR-14801903 Sao Paulo, Brazil
关键词
FLUORIDE RELEASE; ANTIBACTERIAL ACTIVITY; RESTORATIVE MATERIALS; RESIN COMPOSITES; COMPOMERS; NIOBIUM;
D O I
10.1007/s10856-009-3748-7
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
The aim of this paper is to compare the fluoride-releasing and mechanical properties of an experimental luting glass ionomer cement, which has a modified composition and a commercial luting cement. The experimental powder was obtained by sol-gel process and then, it was used to prepare the experimental cements. The properties of cement pastes, such as setting time and working time, microhardness and diametral tensile strength were determined. Fluoride release from GICs was evaluated at time intervals of 1, 7, 14, 21 and 28 days in deionized water. Atomic force microscopy (AFM) analyses showed that the surface of the experimental cements is more homogeneous than commercial GICs. The mechanical properties and the measure of liberation of fluoride of the two cements were influenced by ratio powder:liquid and chemical composition of the precursor powders. Experimental cements released less fluoride than commercial cements. However, this liberation was more constant during the analyzed period. Thus, the results obtained in this study indicated that the composition of the experimental powder modified by the niobium can lead the formation of the polysalt matrix with good mechanical properties. In other words, we can say that experimental powder offered considerable promise for exploitation in dental field.
引用
收藏
页码:1781 / 1785
页数:5
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