Gorken Feyza Nur, Kuru Sinem, Batu Sule, Guven Yegane, Sepet Elif
Oral Health Prev Dent. 2018;16(5):431-438. doi: 10.3290/j.ohpd.a41405.
To understand the effect of the addition of hydroxyapatite (HA) and bioactive glass (BAG) to compomer restorative materials on the remineralisation capacity of the material.
1%, 2%, 3% and 4% w/w HA and BAG particles were added mechanically to the compomers. To examine the resistance to demineralisation, Class V cavities were prepared in extracted teeth and restored with experimental filling materials. Demineralised lesions were created in 72 enamel samples. Vickers microhardness measurements of samples were performed at three different areas including the margin of the restoration, the varnish-protected enamel and the exposed enamel areas. Measurements performed on protected enamel were used as reference enamel values for each group. SEM was used to evaluate the surface texture of the specimens. The statistical analyses were performed by one-way ANOVA, Tukey's HDS and paired-samples t-tests.
BAG and HA groups revealed higher microhardness values at the exposed enamel and exposed marginal enamel than did the control group (p = 0.001). 3% and 4% HA and BAG groups produced higher microhardness values than did 1% modified groups on exposed enamel (p = 0.001). 4% HA group revealed the highest microhardness values on marginal exposed enamel (p = 0.001). 2%, 3%, 4% and HA, as well as 3% and 4% BAG groups showed higher microhardness values than did the control group on marginal exposed enamel at 20 µm depth (p = 0.001). SEM images revealed that HA and BAG particles were not distributed homogeneously and the particles seemed to be grouped in the matrix.
Within the limits of this study, the addition of the BAG and HA into compomers improved the demineralisation resistance properties of enamel, depending on the amount of additive.
了解向复合树脂修复材料中添加羟基磷灰石（HA）和生物活性玻璃（BAG）对材料再矿化能力的影响。
将1%、2%、3%和4%（重量/重量）的HA和BAG颗粒机械添加到复合树脂中。为检测脱矿抗性，在拔除的牙齿上制备V类洞，并用实验性填充材料进行修复。在72个釉质样本中制造脱矿病变。在三个不同区域对样本进行维氏显微硬度测量，包括修复体边缘、涂有清漆保护的釉质和暴露的釉质区域。在受保护釉质上进行的测量用作每组的参考釉质值。使用扫描电子显微镜（SEM）评估标本的表面纹理。采用单因素方差分析、Tukey's HDS和配对样本t检验进行统计分析。
BAG组和HA组在暴露的釉质和暴露的边缘釉质处的显微硬度值高于对照组（p = 0.001）。在暴露的釉质上，3%和4%的HA组和BAG组产生的显微硬度值高于1%改性组（p = 0.001）。4%的HA组在边缘暴露釉质处显示出最高的显微硬度值（p = 0.001）。2%、3%、4%的HA组以及3%和4%的BAG组在20 µm深度的边缘暴露釉质处的显微硬度值高于对照组（p = 0.001）。扫描电子显微镜图像显示，HA和BAG颗粒分布不均匀，颗粒似乎在基质中聚集。
在本研究的范围内，向复合树脂中添加BAG和HA可改善釉质的抗脱矿性能，这取决于添加剂的用量。
