Evaluation of Brittleness of Porcelain Fused to Pure Titanium by Fracture Toughness, Hardness and Fracture Energy
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概要
- 論文の詳細を見る
To elucidate the cause of brittleness of porcelain fused to pure titanium (PFPT) which leads to chipping and cracking similar to that of conventional porcelain in clinical use, fracture toughness KIc, hardness (Hv and Hk) and fracture energy Γ reflecting the bonding energy of atoms were evaluated. In KIc there were no differences between PFPT and conventional porcelain, nor for Hv and Hk, but for the Γ of PFPT calculated from the KIc and the Young modulus measured by the resonance method there was less than that of conventional porcelain. These results indicate that mechanical properties such as KIc and hardness cannot always substantiate the brittleness of PFPT experienced in practical use. However, a comparatively small Γ of PFPT may suggest a fatigue crack growth as a more likely phenomenon as it occurs more easily than the conventional one in oral.
- 日本歯科理工学会の論文
著者
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Nagasawa Toru
Department Of Agricultural Chemistry Kyoto University
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Nagasawa Toru
Department Of Prosthodontics School Of Asahi University Dentistry
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Goto Takayasu
Department Of Physics School Of Asahi University Dentistry
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Goto Takayasu
Department Of Dental Materials And Technology School Of Dentistry Asahi University
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HIGASHINO Yoshifumi
Dental Clinic, Post-doctoral Institute of Clinical Dentistry, Asahi University
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YAMAUCHI Mutsuo
Dental Clinic, Post-doctoral Institute of Clinical Dentistry, Asahi University
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Yamauchi Mutsuo
Dental Clinic Post-doctoral Institute Of Clinical Dentistry Asahi University
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Higashino Yoshifumi
Dental Clinic Post-doctoral Institute Of Clinical Dentistry Asahi University
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