Abstract
The low molecular components were contained in cured composite restorative resin, those materials were influenced to the chemical stabilities and the mechanical properties of cured resin.Therefore, we have been investigated on the extracts from cured composite restorative resins(Clearfil, Silar, Isopast)dipped into MeOH and H2O by using HPLC(High Performance Liquid Chromatography).
The results were obtained as follows;
(1) The components were characterized in the extracts from cured composite resins that dipped into MeOH were as follows;
Clearfil:15 kinds, Silar:11 kinds, Isopast:11 kinds Ten kinds in those components were identified, such as TEGDMA, Bis-GMA, UDMA, GMA, DBP, BPO, TDEA, BA, BPA and Bis-GMA intermediate.
(2) The main components in the extracts from cured composite resins that dipped into MeOH were the monomers(TEGDMA, Bis-GMA, UDMA, Bis-GMA intermediate)and a plasticizer(DBP).
(3) Five or eight kinds of the components were charcterized in the extracts from cured composite resins that dipped into H2O, and the nine kinds in those components were identified.The solubilities of those components into H2O are probably as follows;
TEGDMA>GMA, TDEA>BA, Bis-GMA intermediate, BPA>Bis-GMA, UDMA, DBP>BPO.
