| Project/Area Number |
26870213
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Medical engineering assessment
Materials/Mechanics of materials
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
Otsuka Yuichi 長岡技術科学大学, その他の研究科, 准教授 (80467084)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 水酸アパタイト溶射皮膜 / 臼蓋カップ / 設置公差 / ゆるみ / フレッティング摩耗 / はく離 / 界面 / 破壊力学 / 生体材料 / 水酸アパタイト / 溶射皮膜 / 界面はく離 / 摩耗 / フレッティング / 股関節カップ |
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| Outline of Final Research Achievements |
This study aims at developing a prediction method for loosening lives of acetabular cups by considering localized wear/ delamination by clearances in placing of the cups. In-situ observation revealed that delamination at interfaces between HAp coating with substrate accelerated wear of HAp coating. Cyclic loading system for acetabular cups /stem components has been assembled. Rotational displacements of the acetabular cups were promoted by delamination / wear of HAp coating in cases of larger clearance. FEA also demonstrated that longer delamination length or higher Young’s modulus of simulated fixing bones led to higher wear rates of HAp coating, which may result in shorter loosening lives of the acetabular cups.
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