Ion concentration adjacent to glass-ionomer restorations in primary molars

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• 作者：Ana Cristina Bezerra ; Rita C. Novaes ; Jorge Faber ; Jo E. Frencken ; Soraya C. Leal
• 关键词：Remineralization ; Glass-ionomer cement ; Fluoride ; Calcium ; Phosphorus primary molar ; Ion concentration ; EPMA
• 刊名：Dental Materials
• 出版年：2012
• 出版时间：November, 2012
• 年：2012
• 卷：28
• 期：11
• 页码：e259-e263
• 全文大小：330 K

文摘

Objectives

The aim was to compare the levels of fluoride, calcium and phosphorus in enamel and dentin alongside glass-ionomer-based restorations over time.

Methods

This CCT consisted of children with cavities in the occlusal surface of primary molars that were restored with either a high-viscosity (Fuji IX GP^?) or a resin-modified glass-ionomer (Vitremer^?), being the test groups. Sound teeth (controls) were harvested from the children belonging to the test groups. Sampled teeth were cut in half and the ion concentration measured using EPMA. ANOVAs, and Newman-Keuls tests were performed to analyze the data. The study sample consisted of 35 children having 29 teeth per group available for analyses.

Results

Although statistically significantly higher, the mean ion-concentration of calcium in enamel and dentin, and that of phosphorous in dentin hardly differed between the tests and control groups. The mean fluoride concentration in enamel (0.20 ppm ¡Á 10³ and 0.24 ppm ¡Á 10³) and dentin (0.71 ppm ¡Á 10³ and 0.78 ppm ¡Á 10³) surrounding the Fuji IX GP^? and Vitremer^? restored teeth, respectively was statistically significantly higher than in enamel (0.12 ppm ¡Á 10³) and dentin (0.12 ppm ¡Á 10³) for the control teeth.

Significance

The present in vivo investigation showed that fluoride ions are released from high-viscosity and resin-modified glass-ionomer primary restoration into the restorations¡¯ surrounding enamel and, and in particular, dentin.