Nihi Fabio Mitugui, Fabre Hebert Samuel Carafa, Garcia Georges, Fernandes Karen Barros Parron, Ferreira Flaviana Bombarda de Andrade, Wang Linda
Department of Dentistry, University North of Paraná, Londrina, PR, Brazil.
Braz Dent J. 2009;20(5):396-402. doi: 10.1590/s0103-64402009000500007.
Solvents should be properly evaporated after application to dental substrates. The aim of this study was to assess the evaporation of commercial, experimental and neat solvents. The tested null hypotheses were that there are no differences in solvent evaporation regardless of its formulation and over time. Evaporation from commercial adhesive systems (Scotchbond Multipurpose Primer, Scotchbond Multipurpose Adhesive, Prime & Bond NT, Multi Bond, Excite, Single Bond 2, Adhese Primer, Adhese Bond, Xeno III A and Xeno III B) and experimental primers (35% HEMA plus 65% acetone or ethanol or water v/v) were compared to neat solvents (acetone, ethanol and water). Samples (10 microL) of these products were dripped into glass containers placed on a digital precision balance. Evaporation was assessed at 0, 5, 10, 15, 30, 60, 120, 300 and 600 s times to calculate mass loss. Data were analyzed statistically by ANOVA and Bonferroni's correction (a=0.05). Acetone-based products exhibited a remarkable capacity to evaporate spontaneously over time. Neat acetone evaporated significantly more than the HEMA-mixtures and the commercial formulations (p<0.05). The incorporation of monomers and other ingredients in the commercial formulations seem to reduce the evaporation capacity. Solvent evaporation was time and material-dependent.
溶剂应用于牙科基材后应适当蒸发。本研究的目的是评估市售、实验用和纯溶剂的蒸发情况。所测试的零假设是，无论溶剂配方如何以及随时间变化，溶剂蒸发均无差异。将市售粘结系统（Scotchbond多功能底漆、Scotchbond多功能粘结剂、Prime & Bond NT、Multi Bond、Excite、Single Bond 2、Adhese底漆、Adhese粘结剂、Xeno III A和Xeno III B）和实验底漆（35%甲基丙烯酸羟乙酯加65%丙酮或乙醇或水，体积比）的蒸发情况与纯溶剂（丙酮、乙醇和水）进行比较。将这些产品的样品（10微升）滴入置于数字精密天平上的玻璃容器中。在0、5、10、15、30、60、120、300和600秒时评估蒸发情况以计算质量损失。数据采用方差分析和Bonferroni校正进行统计学分析（α = 0.05）。随着时间推移，基于丙酮的产品表现出显著的自发蒸发能力。纯丙酮的蒸发量明显多于甲基丙烯酸羟乙酯混合物和市售配方产品（p < 0.05）。市售配方中单体和其他成分的加入似乎降低了蒸发能力。溶剂蒸发取决于时间和材料。
