Influence of atmospheric pressure low-temperature plasma treatment on the shear bond strength between adhesive resin cement and contaminated metal surface

ITO Yuki, OKAWA Takahisa, YAMAMURA Takaya, FUKUMOTO Takahiro, NAKAGAWA Syusuke, FUJII Takamasa, TANAKA Masahiro

doi:10.11297/adhesdent.33.4_175

In this study, we examined the influence of atmospheric pressure low-temperature plasma treatment on the shear bond strength between adhesive resin cement and a gold-silver-palladium alloy surface contaminated with silicone oil. After sandblasting with alumina, the gold-silver-palladium alloy specimens were contaminated with a silicone disclosing material, and then the material was removed. Five experimental groups were designed in terms of surface treatment: without treatment (Cont), water rinsed (Wt), washed with absolute ethanol (Sp), sandblasted with alumina (Sb) and treated with atmospheric pressure low-temperature plasma (Ps). After stainless steel was bonded with adhesive resin cement, the specimens were subjected to shear bond testing. Moreover, in order to observe changes in the wettability of the surface, contact angles were determined. Data were analyzed by one-way analysis of variance and multiple comparison test (α=0.01). Groups Sb and Ps showed a high adhesive strength compared with the other groups. Between these two groups, no statistical difference was found. In the contact angle test, Ps showed the lowest contact angle. These results suggest that the atmospheric pressure low-temperature plasma treatment may remove contaminants on the surface of an adherent, facilitating the bonding between metals and adhesive resin cements.

Influence of atmospheric pressure low-temperature plasma treatment on the shear bond strength between adhesive resin cement and contaminated metal surface

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