ZnCl(2) Incorporated into Experimental Adhesives: Selected Physicochemical Properties and Resin-Dentin Bonding Stability.

ZnCl(2) Incorporated into Experimental Adhesives: Selected Physicochemical Properties and Resin-Dentin Bonding Stability.
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DOI:
10.1155/2017/5940479
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发表时间:
2017
影响因子:
--
通讯作者:
Poskus LT
Poskus LT
中科院分区:
生物学3区
文献类型:
--
作者:
Almeida GS;da Silva EM;Guimarães JGA;da Silva RNL;Dos Santos GB;Poskus LT

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本研究的目的是评估含有 ZnCl2 的实验粘合系统的转化度 (DC%)、吸水性 (WS)、溶解度 (SO) 和树脂-牙本质粘合稳定性。将不同浓度(wt.%)的 ZnCl2 添加到由 BISGMA、HEMA、UDMA、GDMA、水和乙醇组成的模型蚀刻和冲洗粘合剂系统中:ZnO(0%-对照组);锌(2%); Zn3.5(3.5%);和Zn5 (5%)。 Adper Single Bond 2 (SB) 用作商业参考。使用石英-钨-卤素装置(650 mW/cm2)对样品进行光固化 20 秒。使用 FT-IR 光谱法测量 DC% (n = 5),并根据 ISO4049 计算 WS 和 SO (n = 5)。在水储存 24 小时和 12 个月后测量微拉伸粘合强度 (μTBS) 和纳米渗漏 (NL) (n = 10)。使用 ANOVA 和 Tukey 的 HSD 检验 (5%) 分析数据。 Zn5 的 DC% 最低,WS 和 SO 最高(p < 0.05)。 Zn0 和 Zn2 呈现统计上相似的 DC%、WS、SO 和即时 μTBS。所有含有 ZnCl2 的粘合剂在 12 个月后均保持 μTBS 稳定性,但只有 Zn2 和 Zn3.5 的 NL 没有增加。 SB 的即时 μTBS 最高,但 12 个月后降低幅度最大 (p < 0.05)。在粘合剂配方中添加 2 wt.% 的 ZnCl2 似乎是提高树脂-牙本质粘合稳定性的一种有前途的方法。浓度高于 2 wt.% 可能会损害某些理化特性。
The aim of this study was to evaluate the degree of conversion (DC%), water sorption (WS), solubility (SO), and resin-dentin bonding stability of experimental adhesive systems containing ZnCl2. Different concentrations (wt.%) of ZnCl2 were added to a model etch-and-rinse adhesive system consisting of BISGMA, HEMA, UDMA, GDMA, water, and ethanol: Zn0 (0%-control group); Zn2 (2%); Zn3.5 (3.5%); and Zn5 (5%). Adper Single Bond 2 (SB) was used as commercial reference. The samples were light cured for 20s using a quartz-tungsten-halogen unit (650 mW/cm2). DC% (n = 5) was measured using FT-IR spectroscopy, and WS and SO (n = 5) were calculated based on ISO4049. Microtensile bond strength (μTBS) and nanoleakage (NL) were measured after 24 h and 12 months of water storage (n = 10). Data were analyzed using ANOVA and Tukey's HSD test (5%). Zn5 presented the lowest DC% and the highest WS and SO (p < 0.05). Zn0 and Zn2 presented statistically similar DC%, WS, SO, and immediate μTBS. All adhesives containing ZnCl2 maintained a μTBS stability after 12 months, but only Zn2 and Zn3.5 did not suffer an increase in NL. SB presented the highest immediate μTBS but the greatest reduction after 12 months (p < 0.05). The addition of 2 wt.% of ZnCl2 in adhesive formulations seems to be a promising way to improve the resin-dentin bonding stability. Higher concentrations than 2 wt.% could impair some physicochemical properties.
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