Interactions between glass ionomer cement and alkali metal fluoride solutions: the effect of different cations.
Interactions between glass ionomer cement and alkali metal fluoride solutions: the effect of different cations.
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玻璃离子水门汀与碱金属氟化物溶液之间的相互作用：不同阳离子的影响。
DOI：
10.1016/s0142-9612(01)00064-3
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发表时间：
2001
期刊：
影响因子：
14
通讯作者：
G. Pearson
中科院分区：
文献类型：
--
作者：
P. C. Hadley;R. Billington;J. Williams;G. Pearson
本研究探讨了等摩尔碱金属氟化物溶液中不同阳离子对它们与玻璃离子水门汀相互作用的影响。氟离子和阳离子的摄取量一起测量溶液pH值的变化和水泥表面的形态变化。使用了两种骨水泥; AH 2，一种含有氟和碱金属（Na）作为玻璃组分的牙科修复粘固剂，以及LG 30，其两者都不含。将1× 10 mm的水泥盘在37°C下在模具中固化1 h，然后在37°C下在水中储存3天。将每个试验组（N=5）中的圆盘浸入10 ml NaF、KF或RbF溶液（均含有900 ppm F−）中，对照圆盘储存在水中，均在37°C下储存24 h。通过伊势电位测定法分析溶液中的F-，通过相同的技术分析溶液中的Na+，并通过原子吸收光谱法分析溶液中的K+和Rb+。通过用于浸没的溶液与对照溶液之间的差异获得摄取。通过电位法测量溶液pH。通过线性触针轮廓术测量圆盘的表面粗糙度。AH 2的氟离子摄取量为451μmol/g NaF、378 KF和318 RbF。LG 30的可比数字分别为202、161和159。除KF/LG 30与RbF/LG 30外，骨水泥之间以及溶液配对之间的差异均具有统计学显著性。AH 2/NaF、AH 2/RbF和LG 30/KF对阳离子的吸收是等摩尔的，但AH 2/KF和LG 30/NaF的M+：F−比显著高于1，而LG 30/RbF的M+：F−比显著低于1。pH值变化均为正值，AH 2显著高于LG 30，RbF显著高于每种骨水泥的其他氟化物溶液（可能是因为其初始pH值较低）。所有溶液的最终pH值与中性（pH 7）相差小于1个pH单位。与储存在水中的对照盘相比，AH 2骨水泥测试盘均显示出粗糙度（Ra）显著增加，而LG 30盘没有显示出这种差异。回归分析表明，吸氟量与Ra呈显著正相关。得出的结论是，改变碱金属阳离子会影响所有四个变量（F−吸收，M+吸收，pH值变化和水泥表面粗糙化程度）。
This study examines the effect of different cations in equimolar alkali metal fluoride solutions on their interactions with glass ionomer cements. Uptake of both fluoride and cation were measured together with change in solution pH and morphological changes in the cement surface. Two cements were used; AH2, a dental restorative cement containing both fluorine and alkali metal (Na) as glass components and LG30, which contained neither. Discs of cement 1×10mm were set in moulds at 37°C for 1h then, stored in water for 3 days at 37°C. Discs in each test group (N=5) were immersed in 10ml of solutions of either NaF, KF, or RbF, all containing 900ppm F−, control discs were stored in water, all at 37°C for 24h. Solutions were analysed for F−by ISE potentiometry, Na+by the same technique and K+and Rb+were analysed by atomic absorption spectrometry. Uptake was obtained by difference between solution used for immersion and the control solution. Solution pH was measured potentiometrically. The surface roughness of the discs was measured by linear stylus profilometry. Fluoride ion uptakes for AH2 were 451μmol/g NaF, 378 KF, and 318 RbF. The comparable figures for LG30 were 202, 161, and 159. Differences between cements were all statistically significant and also between solutions pairings except for the KF/LG30 vs. RbF/LG30. Uptake of cations was equimolar for AH2/NaF, AH2/RbF and LG30/KF but M+:F−ratios were significantly above unity for AH2/KF and LG30/NaF and significantly below unity for LG30/RbF. The pH changes were all positive and were significantly higher for AH2 than LG30 and for RbF compared to the other fluoride solutions for each cement (probably because of its lower initial pH). The final pH of all solutions were less than 1 pH unit from neutral (pH7). The AH2 cement test discs all showed significant increase in roughness (Ra) compared to control discs stored in water whereas the LG30 discs showed no such difference. Regression analysis showed a significant positive correlation between fluoride uptake and Ra. It was concluded that changing the alkali metal cation influenced all four variables examined (F−uptake, M+uptake, pH change and extent of cement surface roughening).