| 초록 |
The organic matrix generally contains 2,2 bis [4-(2–hydroxy–3-methacryloyloxy propoxy) phenyl] propane] (Bis-GMA), as a base resin, and triethylene glycol dimethacrylate (TEGDMA), as a diluent. However, increased amounts of the TEGDMA have adverse effects on properties such as water uptake and during shrinkage. To overcome the disadvantage of Bis-GMA, i.e., 2,2 bis [4-(2–ethoxy–3-methacryloyloxy propoxy) phenyl] propane (Bis-E-GMA), 2,2 bis [4-(2–propoxy–3-methacryloyloxy propoxy) phenyl] propane (Bis-P-GMA) and 2,2 bis [4-(2–butoxy–3-methacryloyloxy propoxy) phenyl] propane (Bis-B-GMA) were prepared by substituting the alkoxy groups for hydroxyl groups in the Bis-GMA. Their viscosities and curing characteristics such as curing shrinkage, required amount of time for the curing reaction, and degree of polymerization were explored. Mechanical properties and curing characteristics of dental composites fabricated from them were also explored. |
