J Adhes Dent. 2019;21(4):299-306. doi: 10.3290/j.jad.a42997.
To evaluate the effect of the chelating agents phytic acid and EDTA on the degree of conversion (DC), microhardness, and tensile bond strength (TBS) of two chemical-curing self-adhesive cements.
A total of 110 samples were prepared, with n = 6 in the control group to measure microhardness, n = 6 for DC measurement, and n = 10 for TBS measurement. The bovine dentin specimens were divided into five groups according to treatment: group A (control group): no treatment; group B, 1% phytic acid with ultrasonic rinsing (UR); group C: 1% phytic acid without UR; group D: 18% EDTA with UR; group E: 18% EDTA without UR. A 1-mm-thick coat of self-adhesive cement, G-CEM LinkAce (GC) or RelyX Unicem 2 (3M) was placed on control and treated dentin surfaces and stored in a dark box at 37°C, 93% ± 1% ambient humidity. DC and microhardness of cement surfaces were measured after 1 hour, 1 day, 3 days, and 1 week using Fourier transform infrared spectroscopy and a Vickers microhardness tester, respectively. TBS on treated and control dentin was evaluated after 1 week of storage in the dark box. Data were analyzed using two-way ANOVA, followed by Tukey's post-hoc test, at the 0.05 level of significance.
DC and microhardness of both types of cement without UR were significantly lower than that of groups in which UR was performed. Neither chelating agent had a significant effect on the TBS of G-CEM. For Rely X, the phytic acid treatment with UR showed a significantly higher TBS than the control and the EDTA groups.
The chelating agents had a negative effect on DC and microhardness of the resin cements when UR was not used. Phytic acid increased the TBS of RelyX, while EDTA groups did not with either cement.
评估螯合剂植酸和 EDTA 对两种化学固化自粘结水门汀的转化率（DC）、显微硬度和拉伸粘结强度（TBS）的影响。
共制备 110 个样本，对照组用于测量显微硬度 n = 6，用于 DC 测量 n = 6，用于 TBS 测量 n = 10。牛牙本质标本根据处理方法分为五组：A 组（对照组）：无处理；B 组：1%植酸加超声冲洗（UR）；C 组：1%植酸无 UR；D 组：18%EDTA 加 UR；E 组：18%EDTA 无 UR。在对照组和处理后的牙本质表面涂一层 1mm 厚的自粘结水门汀 G-CEM LinkAce（GC）或 RelyX Unicem 2（3M），并在 37°C、93%±1%环境湿度的暗盒中储存。使用傅里叶变换红外光谱仪和维氏硬度计分别在 1 小时、1 天、3 天和 1 周后测量水泥表面的 DC 和显微硬度。在暗盒中储存 1 周后，评估处理和对照牙本质的 TBS。使用双因素方差分析，然后使用 Tukey 事后检验，在 0.05 水平下进行数据分析。
未进行 UR 的两种水门汀的 DC 和显微硬度均显著低于进行 UR 的组。两种螯合剂对 G-CEM 的 TBS 均无显著影响。对于 RelyX，用 UR 处理的植酸显示出比对照组和 EDTA 组更高的 TBS。
当未进行 UR 时，螯合剂对树脂水门汀的 DC 和显微硬度有负面影响。植酸提高了 RelyX 的 TBS，而 EDTA 组则没有。
