| Project/Area Number |
09671481
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Orthopaedic surgery
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| Research Institution | Yamanashi Medical University |
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Principal Investigator |
IDE Takatoshi (1999) Yamanashi Medical University Assistant Professor, 医学部, 講師 (60159853)
赤松 功也 (1997-1998) 山梨医科大学, 医学部, 教授 (10057094)
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| Co-Investigator(Kenkyū-buntansha) |
井手 隆俊 山梨医科大学, 医学部, 講師 (60159853)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1999: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1998: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1997: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | Total Hip Arthroplasty / Friction / Abrasion / Polyethylen / Fluid Film Lubrication / 人口股関節 / high density polyethylene(HDP) |
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| Research Abstract |
Current artificial hip joints are with flat contact surfaces, resulting in sever wear. We studied that a new CO-Cr alloy head embedded with polyethylene was proposed as a method for improving the lubrication performance of the joints.
The head embedded with several small pieces of polyethylene, and ordinary polyethylene-socket were used. Wear tests were carried out with reciprocating tester at a load of 500N in pure water and saline. The obtained experimental results are as follows:
(1) Wear rate of the new modified joint was less than that of the ordinary artificial joint.
(2) Very little surface damage for the new modified joint was found, as a result of sliding contact between polyethylene-socket and the head covered with polyethylene thin film.
(3) An amount of lubrication of the new modified joint was about 0.5 times compared with a conventional one.
We concluded that a life-span of the artificial joint will be extended about two times when using our new concept.
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