Radiopaque acrylic adhesive resin with bismuth subcarbonate-poly(methyl methacrylate) composite

Purpose: A radiopaque self-polymerizing adhesive resin was prepared by incorporating bismuth subcarbonate-poly(methyl methacrylate) prepolymerized composite (BS-PMMA) into an acrylic resin. The purpose of this study to evaluate the radiopacity resins.Methods: As a component, containing 50% subcarbonate used, and other metal compounds were adopted as controls. They added finely pulverized PMMA. Specimens from powders, methyl methacrylate (MMA) monomer with 5% 4-methacryloyloxyethyl trimellitate anhydride (4-META) tri-n-butylborane derivative (TBB) mixing. Radiographs specimens taken together tooth slices aluminum step wedges. density determined densitometer expressed in terms equivalent thickness per 2.0 mm unit specimen. Results: value BS-PMMA-based specimen 3.7 Al / specimen, which nearly same enamel (3.7) exceeded values dentin (2.0). Conclusion: BS-PMMA are useful additive for