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Vibrational Analysis by Raman Spectroscopy of the Interface Between Dental Adhesive Resin and Dentin
M. Suzuki
Department of Chemistry, College of Arts & Sciences, Showa University, Shinagawa-ku, Tokyo 142, Japan
H. Kato
Department of Operative Dentistry, School of Dentistry, Showa University, Ohta-ku, Tokyo 145, Japan
S. Wakumoto
Department of Operative Dentistry, School of Dentistry, Showa University, Ohta-ku, Tokyo 145, Japan
The Raman microprobe technique was applied for analysis of the molecular components at the adhesive interface between 4-META/MMA-TBB resin and dentin. The Raman spectra showed that the 4-META molecules in monomer solution were mostly hydrolyzed into 4-MET molecules, which were then co-polymerized with MMA molecules to form resin and resin-reinforced dentin layers. On the basis of line analysis by the Raman microprobe, resin molecules were estimated to penetrate 6 µm into the dentin from the interface. Raman intensity studies indicated that the concentration of 4-MET molecular units in the resin-reinforced dentin was more than four times the concentration in the original monomer solution. This demonstrated the excellent infiltration ability of 4-MET monomer into dentin substrate in situ.
Journal of Dental Research, Vol. 70, No. 7,
1092-1097 (1991)
DOI: 10.1177/00220345910700071501
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