Effect of Surface Modification Using Super Critical Water for Metal Substrate on the Bonding Strength of Veneering Resins

DOI 2 Citations 39 References
  • BAN Seiji
    Biomaterials Science, Kagoshima University Dental School
  • TSURUTA Shozo
    Dental Material Science, School of Dentistrv, Aichi-Gakuin University

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  • 超臨界水処理が金属基板と硬質レジンの接着強さに及ぼす影響

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Abstract

After sandblasting, pure titanium and 12% AuPdAg alloy plates were treated with super critical water (SCW) in an autoclave under 45 MPa at 450℃. Field emission-type scanning electron microscopy showed that fine particles, less than 0.2 μm, were formed on the cpTi with SCW and a thick layer formed on the surface heated to 600℃ in the air. X-ray diffractometric study revealed that TiO2 formed on the cpTi with both the treatments, whereas no appreciable oxides were observed on the 12% AuPdAg alloy with SCW, although CuO formed on the alloy heated to 600℃ in the air. The bonding strength of two types of veneering resin to both metal plates with and without the above treatments was determined. The bonding strength of cpTi with SCW to one resin was larger than the other conditions (p<0.05). However, there were no significant effects of SCW on the bonding strength between 12% AuPdAg alloy and veneering resins (p>0.05).

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