Fatigue of Tooth-colored Restoratives in Aqueous Environment
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概要
- 論文の詳細を見る
The purpose of this study was to investigate the interaction between mechanical and chemical fatigue in resin composites and dental ceramics, and the effects thereof on fatigue resistance of tooth-colored restoratives. To this end, the fatigue fracture resistance of restoratives under dry and aqueous conditions were analyzed by a dynamic fatigue crack propagation test using beam-shaped specimens with a precrack. Fatigue crack propagation characteristics were expressed by the correlation between fatigue crack growth rate (da/dN) and stress intensity factor range (ΔK). In addition, fatigue crack growth threshold (ΔK_<th>) was calculated. Following the fatigue test, a fractographic examination was performed using scanning electron microscopy. Fatigue crack initiation was retarded in resin composites under aqueous condition, but dental ceramics were susceptible to slow crack growth after crack initiation. SEM images of the fatigue facture surfaces reflected inorganic and organic filler particles of different sizes in composites and the bonding at crystal-glass interface in ceramics. It was concluded that water exerted different effects on the fatigue resistance of composites and ceramics.
- 日本歯科理工学会の論文
著者
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HAYASHI Mikako
Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
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EBISU Shigeyuki
Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
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Hayashi Mikako
大阪大学 歯学研究科歯科保存学教室
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Hayashi Mikako
Department Of Restorative Dentistry And Endodontology Osaka University Graduate School Of Dentistry
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Hayashi Mikako
大阪大学 歯学研究科歯科保存学
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Ebisu Shigeyuki
Department Of Restorative Dentistry And Endodontology Osaka University Graduate School Of Dentistry
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Ebisu Shigeyuki
Department Of Conservative Dentistry Osaka University Faculty Of Dentistry
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Ebisu Shigeyuki
Department Of Restorative Dentistry And Endodontology Division Of Oral Infections And Disease Contro
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Hayashi Mikako
Osaka Univ. Graduate School Of Dentistry Osaka Jpn
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KAWAKAMI Yoshiko
Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
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TAKESHIGE Fumio
Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
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Kawakami Yoshiko
Department Of Applied Biological Chemistry Faculty Of Agriculture Shizuoka University
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Kawakami Yoshiko
Department Of Restorative Dentistry And Endodontology Osaka University Graduate School Of Dentistry
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Takeshige Fumio
Department Of Restorative Dentistry And Endodontology Osaka University Graduate School Of Dentistry
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