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首页> 外文期刊>The Journal of Prosthetic Dentistry >Impact of water quality on setting of irreversible hydrocolloid impression materials.
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Impact of water quality on setting of irreversible hydrocolloid impression materials.

机译：水质对不可逆水胶体印模材料凝结的影响。

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STATEMENT OF PROBLEM: Setting of irreversible hydrocolloid impression materials is based on the ionic reaction between carboxylic groups and calcium ions and may, therefore, be affected by ionic species present in the mixing water. The impact of this phenomenon on the clinical performance of these materials has not been well documented. PURPOSE: The purpose of this study was to compare the setting behavior of irreversible hydrocolloid impression materials when mixed with tap and distilled water, and to determine the impact of typical cations present in tap water and their concentrations on the setting process. MATERIAL AND METHODS: Six brands of irreversible hydrocolloid impression materials (Kromopan 100, Xantalgin Select FS, Alginoplast, Elastic Plus, Ypeen, and Ypeen Premium) were mixed with tap and distilled water (control) according to manufacturers' recommendations. Elastic Plus was also mixed with aqueous solutions containing various concentrations of NaCl, CaCl(2), and AlCl(3) to determine the role of typical cations on setting. Using a controlled shear stress oscillatory rheometer, time changes of storage (G') and loss (G'') moduli during setting were measured at 23 degrees C and used to determine the working and setting times and rigidity of set impression materials. The sample size (n=3) for each material/mixing system was increased to 8 to increase reliability of measurements in systems where the effect of mixing water was low or variance of results was high. The data were analyzed (alpha=.05) using a t test (tap water), a 1-way ANOVA, a Tukey post hoc test (shear stress), and a nested ANOVA and Fisher Least Significant Difference post hoc analysis (cation and cation concentration). RESULTS: Statistical analysis showed significant (P<.001) acceleration in the setting rate for Kromopan 100, the working time of which was shorter with tap water by 23.4 seconds and the setting time, by 32.8 seconds. Similar significant reductions (in seconds) in both working and setting times, respectively, were found with Xantalgin Select FS (12.0, P<.001 and 23.6, P<.002), Alginoplast (24.3, P<.001 and 44.7, P<.005), and Elastic Plus (23.0, P<.001 and 22.0, P<.002), when compared with the same materials mixed with distilled water. At the same time, the rigidity of the set impression materials mixed with tap water increased by approximately 10%. With Ypeen Premium, the setting time decreased significantly by 20.0 seconds (P<.001) with tap water, while the working time and rigidity did not change. The setting behavior of Ypeen was not significantly affected by water quality. Acceleration of the setting reactions and increase in impression rigidity depended (P<.001) primarily on concentration and valency of cations present in mixing water. CONCLUSION: Setting of irreversible hydrocolloid impression materials can be significantly accelerated when tap water with high water hardness is used for mixing or when the mixing water contains higher concentrations of cations such as Na(+), Ca(2+), and Al(3+).
机译：问题陈述：不可逆的水胶体印模材料的固化是基于羧基和钙离子之间的离子反应，因此可能会受到混合水中存在的离子种类的影响。这种现象对这些材料的临床性能的影响尚未得到充分证明。目的：本研究的目的是比较不可逆的水胶体印模材料与自来水和蒸馏水混合时的凝结性能，并确定自来水中存在的典型阳离子及其浓度对凝结过程的影响。材料和方法：根据制造商的建议，将六个品牌的不可逆水胶体印模材料（Kromopan 100，Xantalgin Select FS，Alginoplast，Elastic Plus，Ypeen和Ypeen Premium）与自来水和蒸馏水（对照）混合。 Elastic Plus还与包含各种浓度的NaCl，CaCl（2）和AlCl（3）的水溶液混合，以确定典型阳离子在凝结中的作用。使用受控的剪切应力振荡流变仪，在23摄氏度下测量凝固过程中的储能（G'）和损耗（G''）模量的时间变化，并用于确定凝固压印材料的工作和凝固时间以及刚度。每个材料/混合系统的样本大小（n = 3）增加到8，以提高在混合水影响低或结果差异大的系统中测量的可靠性。使用测试（自来水），1向ANOVA，Tukey post hoc测试（剪切应力）以及嵌套的ANOVA和Fisher最小显着差异事后分析（阳离子和阳离子）对数据进行分析（alpha = .05）。浓度）。结果：统计分析表明，Kromopan 100的凝结速度显着加快（P <.001），其中自来水的工作时间缩短了23.4秒，凝结时间缩短了32.8秒。 Xantalgin Select FS（12.0，P <.001和23.6，P <.002），Alginoplast（24.3，P <.001和44.7，P）分别在工作时间和凝结时间方面均出现了类似的显着减少（以秒为单位）。与相同材料与蒸馏水混合时，<0.005）和Elastic Plus（23.0，P <.001和22.0，P <.002）。同时，与自来水混合的固化印模材料的刚度提高了约10％。使用Ypeen Premium，自来水的凝结时间大大减少了20.0秒（P <.001），而工作时间和刚度却没有改变。叶平的凝结行为不受水质的显着影响。固化反应的加速和压印刚度的增加主要取决于（P <.001），主要取决于混合水中存在的阳离子的浓度和化合价。结论：当使用具有高水硬度的自来水进行混合时，或者当混合水包含较高浓度的阳离子，例如Na（+），Ca（2+）和Al（3）时，不可逆水胶体印模材料的凝结可以大大加速。 +）。

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