Hashimoto Masanori, Nagano Futami, Endo Kazuhiko, Ohno Hiroki
Division of Biomaterials and Bioengineering, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Japan.
Eur J Oral Sci. 2010 Feb;118(1):94-9. doi: 10.1111/j.1600-0722.2009.00699.x.
The contents of volatile adhesive compounds, such as water, solvents, and residual unpolymerized monomers, affect the integrity and durability of adhesive bonding. However, there is no method available that can be used to rapidly assess the residual solvent or water contents of adhesive resins. This study examined the effectiveness of a digital moisture analyzer to measure the volatile compound contents of resins. Five self-etching adhesives and seven experimental light-cured resins prepared with different contents (0, 10, and 20% by weight) of water or solvents (acetone and ethanol) were examined in this study. The resins were prepared using different methods (with and without air blast or light-curing) to simulate the clinical conditions of adhesive application. Resin weight changes (% of weight loss) were determined as the residual volatile compound contents, using the moisture analyzer. After the measurements, the resin films were examined using a scanning electron microscope. The weight changes of the resins were found to depend on the amount of water or solvents evaporating from the resin. Water and solvents were evaporated by air blast or light-curing, but some of the water and solvents remained in the cured resin. The moisture analyzer is easy to operate and is a useful instrument for using to measure the residual volatile compound contents of adhesive resin.
挥发性胶粘剂成分，如水、溶剂和残留的未聚合单体，会影响胶粘剂粘结的完整性和耐久性。然而，目前尚无可用于快速评估胶粘剂树脂中残留溶剂或水分含量的方法。本研究考察了数字水分分析仪测量树脂中挥发性化合物含量的有效性。本研究检测了五种自酸蚀胶粘剂和七种用不同含量（按重量计0%、10%和20%）的水或溶剂（丙酮和乙醇）制备的实验性光固化树脂。采用不同方法（有或无吹干或光固化）制备树脂，以模拟胶粘剂应用的临床条件。使用水分分析仪将树脂重量变化（失重百分比）确定为残留挥发性化合物含量。测量后，使用扫描电子显微镜检查树脂膜。发现树脂的重量变化取决于从树脂中蒸发的水或溶剂的量。水和溶剂通过吹干或光固化蒸发，但仍有一些水和溶剂残留在固化树脂中。水分分析仪操作简便，是用于测量胶粘剂树脂残留挥发性化合物含量的有用仪器。
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