義歯床用レジンの接着性および物理,化学的性質に及ぼすプラズマによる表面改質の影響

概要

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The plasma irradiation leads to the surface modulation, such as improvement of wettability of polymers. The purpose of this study was to examine the influence of plasma irradiation on the adhesion between denture base resin and repair or relining materials. In addition, the property of a denture base resin after plasma irradiation were examined. Materials used in this study included PMMA denture base resin (PM: heat curing resin), repair (self curing resin) and relining (self curing resin) materials. After plasma treatment was applied to the PM for 1-90 seconds, the surface roughness, contact angle, elasticity modulus and shear bond strength were examined. The condition without plasma irradiation was served as a control. The results obtained were as follows. 1. Plasma-irradiated condition had greater surface roughness as compared with the contol. 2. Plasma-irradiated condition had lower contact angle as compared with the contol. 3. No significant difference was observed between the plasma-irradiated condition and the control concerning the elastic modulus of the examined PM. 4. No significant difference was observed between the plasma-irradiated condition and the control concerning the shear bond strength of the examined PM and relining materials. However, it was concluded that the 30-90 second plasma treatment was effective on the increase of shear bond strength between PM and repair materials.
2004-09-30