Immobilization of simulated reducing agent at the surface of SiO2 fillers in dental composite resins.
To reduce the leachability of reducing agents from composite resins, immobilization of a simulated reducing agent at the surface of SiO2 fillers was examined. SiO2 plates were immersed in 2% 3-aminopropyltriethoxy silane/ethanol solution, and then immersed in dimethyl sulfoxide with 0.25 wt% 4-dimethyl amino benzoic acid (DMABA), 2.0 wt% 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride, and 0.5 wt% N-hydroxysuccinimide. Wide-scan spectrum of X-ray photoelectron spectroscopy did not detect carbon contamination. However, narrow scan detected an O=C-N peak at 399.8 eV, suggesting that DMABA could be immobilized on silane-coupled SiO2 plates. Further, surface plasmon resonance analysis indicated the adsorption of MMA at the surface of reducing agent-immobilized plate.
Shibata
Satoki
S
Department of Operative Dentistry and Dental Materials, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima 734-8553, Japan.
Hirata
Isao
I
Nomura
Yuji
Y
Shirai
Kenichi
K
Fujitani
Morioki
M
Shintani
Hideaki
H
Okazaki
Masayuki
M
D010129:4-Aminobenzoic Acid / Q000633:toxicity; D000180:Acrylic Resins / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D019163:Reducing Agents / Q000633:toxicity*; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties; D062366:para-Aminobenzoates
D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D011140:Polyurethanes; D019163:Reducing Agents; D062366:para-Aminobenzoates; D012822:Silicon Dioxide; C030747:ethyl 4-dimethylaminobenzoate; D010129:4-Aminobenzoic Acid