| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a biological member with high strength, high toughness, and a high degree of hardness, a joint prosthesis using the same, and the biological member and the joint prosthesis showing high abrasion resistance in an in vivo environment. <P>SOLUTION: The biological member comprises ceramics which includes ZrO<SB>2</SB>and shows a Charpy impact value of at least 45 kJ/m<SP>2</SP>in a Charpy impact test. The ceramics shows a decreasing rate equal to or less than 10% of the Charpy impact value in the Charpy impact test before and after an accelerated aging test performed under the condition of saturated water vapor at 121°C for 152 hours. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
