2013 Fiscal Year Final Research Report
Shape design of sliding surfaces of hip joint prostheses, the trial manufacture and the evaluation of lubricating ability
| Project/Area Number |
23560170
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Kitasato University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Keywords | トライボロジー / 人工関節 / 流体潤滑 / 形状設計 / 半径差 / 摩擦測定 |
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| Research Abstract |
Fluid film formation is necessary for long term reliability of a total hip prosthesis because solid contact of the prosthesis induces serious wear. Radial clearance is an important factor. Which radial clearance is appropriate should be clarified. We prepared some specimens with high accuracy of polishing, which were balls and cups of the Co-Cr-Mo alloy with a common radius of 16 mm and several radial clearances. Their lubricating ability was evaluated by a friction test using a pendulum machine under the load of 600 N. As the results, the frictional coefficient was the minimum where the radial clearance was 20-30 micro meter. The lowest value of frictional coefficient was, however, measured over 0.1. This results showed that the lubricating ability is unfortunately insufficient under the appropriate conditions of the metal on metal articulation.
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[Journal Article] Hammering sound frequency analysis and prevention of intraoperative periprosthetic fractures during total hip arthroplasty2011
Author(s)
Sakai R, Kikuchi A, Morita T, Takahira N, Uchiyama K, Yamamoto T, Moriya M, Uchida K, Fukusima K, Tanaka K, Takaso M, Itoman M, Mabuchi K.
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Journal Title
Hip International
Volume: 21(6)
Pages: 718-23
Peer Reviewed
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[Journal Article] Hammering force during cementless total hip arthroplasty and risk of microfracture2011
Author(s)
Sakai R, Takahashi A, Takahira N, Uchiyama K, Yamamoto T, Uchida K, Fukushima K, Moriya M, Takaso M, Itoman M, Mabuchi K.
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Journal Title
Hip Int.
Volume: 21(3)
Pages: 330-335
DOI
Peer Reviewed
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