Study on Quantitative Analysis of Chemicals in Light-cured Base Materials

Especially on Base Monomer

Abstract

Base monomers of light-cured base materials, ULTRA-BLENDTM and IONOSIT(R) BASE LINER and their curing characteristics were examined. The results were as follows:
1. The total amounts of monomer in one gram of the base material before exposure were 72.88±3.32mg/g of Bis-GMA and 97.26±3.38mg/g of TEDMA in IONOSIT® BASE LINER, and 497.95±12.38mg/g of UDMA in ULTRABLEND^TM.
2. The longer the exposure was, the less the residual monomer tended to be. However, changes were scarcely seen with over 30 seconds of exposure for the IONOSIT(R) BASE LINER and over 40 seconds for ULTRA-BLEND^TM.
3. The amounts of residual monomer with 60 seconds of exposure were Bis-GMA: 7.63±0.53mg/g, TEDMA: 1188±0.85mg/g, and UDMA: 91.93±4.63mg /g.