チタン鋳造体の加熱処理条件が硬質レジンとの接着耐久性に及ぼす影響

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Thermal treatment is an essential surface treatment to improve the adhesion durability of light-cured facing resin to titanium (Ti). The purpose of this study was to examine the influence of heating temperature and time for Ti castings on the adhesion durability of light-cured facing resin as well as to elucidate its optimal heating conditions. Experiments were conducted in this study by means of thermal cycling test, shear bonding strength test, X-ray diffraction analysis, glow discharge optical emission spectrochemical analysis, surface roughness test and measurement of dimensional changes using three-dimensional coordinate measurement system. In the experiment, pure Ti and three kinds of light-cured facing resin were used. Ti was heated at 600℃ for 10, 30 and 60 minutes, at 700℃ for 10, 30 and 60 minutes and at 800℃ for 5, 10 and 30 minutes. When Ti was heated at high temperature for a long time, not only the amount of rutile (TiO_2) produced on the Ti surface but also the thickness of rutile layer increased. The surface roughness of Ti surface showed a significantly large value when heated at 800℃ for 30 minutes. The deformation of Ti castings due to heating at 800℃ for 10 minutes was small with almost no influence on the adaptability. The shear bonding strength of light-cured facing resin to Ti showed the highest value in all examined light-cured facing resins when heated at 800℃ for about 10 minutes. Thus it was suggested that an appropriate shear bonding strength and adhesion durability of light-cured facing resin to Ti could be realized by heating at 800℃ for 10 minutes.
奥羽大学の論文
2005-06-30

著者

星野匠
奥羽大学歯学部生体材料学講座

チタン鋳造体の加熱処理条件が硬質レジンとの接着耐久性に及ぼす影響

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