Abstract
Leaching of monomers from four different types of chemically-activated direct relining materials was determined by means of high-performance liquid chromatography.Disk-shaped specimens(10mm diameter and 1mm thickness)of the cured relining materials were immersed in distilled water at 37℃ for 1 day, 1 week, 2 weeks, 3 weeks, 1 month and 2 months.Leaching of monomers into the water proceeded rapidly for the first week, and then declined to lower rates.Lower amounts of monomer leaching were still observed after immersion in water for 2 months.The results of this study suggested that monomer composition of the relining materials affects the behavior of monomer leaching in an oral environment.
