目的:为了评估玻璃离聚物水泥(GIC)修复体的氟化物和银离子释放,包括常规GIC(CGIC)和树脂改性GIC(RMGIC)修复体,用38%的二氟化银(SDF)溶液预处理牙本质。
方法:将80个牙本质块分为4组,用SDF+CGIC修复,CGIC,SDF+RMGIC和RMGIC,分别。将每个块在37°C的去离子水中储存2年。使用离子选择电极和电感耦合等离子体发射光谱法测量存储溶液中的氟化物和银离子浓度长达2年。通过X射线衍射分析(XRD)评估修复的牙本质块的横截面表面,扫描电子显微镜(SEM)与能量色散X射线光谱(EDS)后1周和2年,分别。
结果:SDF+CGIC中累积氟化物释放的平均值±标准偏差(SD),CGIC,SDF+RMGIC和2年RMGIC为0.13±0.005mg,0.09±0.006毫克,0.15±0.008毫克和0.05±0.003毫克,分别(组SDF+RMGIC>SDF+CGIC>CGIC>RMGIC,p<0.05)。SDF+CGIC中银累积释放的平均值±SD,CGIC,SDF+RMGIC和2年的RMGIC为0.03±0.009毫克,0.00±0.00mg,0.01±0.003毫克,和0.00±0.00毫克,分别(组SDF+CGIC>SDF+RMGIC>CGIC和RMGIC,p<0.05)。与CGIC和RMGIC组相比,SDF+CGIC和SDF+RMGIC组显示出持续更高的氟化物和银释放(p<0.05)。XRD分析表明,氟磷灰石和氯化银仅在SDF+CGIC和SDF+RMGIC组中观察到,但不在CGIC和RMGIC组中。牙本质块横截面图的SEM图像显示,在SDF预处理的组中,牙本质小管中的银晶体1周和2年。
结论:38%SDF牙本质预处理可持续增加GIC和RMGIC修复体的氟化物和银释放长达2年。
OBJECTIVE: To assess the fluoride and silver ion release of glass ionomer cement (GIC) restorations, including conventional GIC (CGIC) and resin-modified GIC (RMGIC) restorations, with 38 % silver diamine fluoride (SDF) solution dentin pretreatment.
METHODS: Eighty dentin blocks were allocated into 4 groups and restored with SDF+CGIC, CGIC, SDF+RMGIC and RMGIC, respectively. Each block was stored in deionized water at 37 °C for 2 years. Fluoride and silver ion concentration in storage solution was measured using ion-selective electrode and inductively coupled plasma-optical emission spectrometry for up to 2 years. The cross-sectional surfaces of restored dentin blocks were assessed by X-Ray diffraction analysis (XRD), scanning electron microscope (SEM) with energy-dispersive X-ray spectroscopy (EDS) after 1 week and 2 years, respectively.
RESULTS: The mean ± standard deviation (SD) of accumulative fluoride releasing in SDF+CGIC, CGIC, SDF+RMGIC and RMGIC for 2 years were 0.13±0.005 mg, 0.09±0.006 mg, 0.15±0.008 mg and 0.05±0.003 mg, respectively (Groups SDF+RMGIC > SDF+CGIC > CGIC >RMGIC, p < 0.05). The mean ± SD of accumulative silver releasing in SDF+CGIC, CGIC, SDF+RMGIC and RMGIC for 2 years were 0.03±0.009 mg, 0.00±0.00 mg, 0.01±0.003 mg, and 0.00±0.00 mg, respectively (Groups SDF+CGIC > SDF+RMGIC > CGIC&RMGIC, p < 0.05). Groups SDF+CGIC and SDF+RMGIC showed sustainably higher fluoride and silver releasing compared to Groups CGIC and RMGIC (p < 0.05). XRD analysis indicated the fluorapatite and silver chloride were observed only in Groups SDF+CGIC and SDF+RMGIC, but not in Groups CGIC and RMGIC. SEM images of the cross-sectional view of the dentin blocks showed silver crystals within dentinal tubules 1 week and 2-year in Groups with SDF pretreatment.
CONCLUSIONS: The 38 % SDF dentin pretreatment sustainably increased the fluoride and silver release of GIC and RMGIC restorations for up to 2 years.