Effects of Air on Volatile Compound Contents in Resins

Abstract

This study examined the effects of air contact and air blowing on residual volatile compounds contents of resin before and after light polymerization. Five experimental resins (Bis-GMA, TEGDMA, and HEMA-based resins) and five adhesive resin systems were examined in this study. The resins were prepared with different methods (with and without air contact or air blowing) to simulate the clinical conditions of adhesive application. The contents of the residual volatile compound in the resins were determined by measuring weight change using a moisture analyzer. The solvents (acetone, ethanol, and water) were easily evaporated under air contact. Although air blowing effectively removed the volatile contents of acetone, ethanol and water from resins, high amounts of volatile compounds remained in HEMA-based resins.
Air blowing removes the volatile compounds (acetone, ethanol or water) from adhesives to different degrees; however, an inverse result may occur in the case of HEMA.