バイオエンジニアリング講演会講演論文集
Online ISSN : 2424-2829
セッションID: 1G26
会議情報
1G26 人工軟骨用ハイドロゲルのトライボ特性および力学特性の評価
村上 輝夫鎗光 清道中嶋 和弘山口 哲生小俣 誠二佐々木 沙織澤江 義則坂井 伸朗鈴木 淳史
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会議録・要旨集 認証あり

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In joint prostheses where ultra-high molecular weight polyethylene (UHMWPE) is used as bearing material, efficacious treatments such as crosslinking, addition of vitamin E and the grafting of phospholipid polymer are known to have improved wear resistance. However, friction and wear problems have not yet been completely solved under severe conditions, where direct contacts can occur in mixed or boundary lubrication. Accordingly, joint prostheses containing artificial hydrogel cartilage with properties similar to those of articular cartilage are expected to show superior tribological functions. The application of poly(vinyl alcohol) (PVA) hydrogel with high water content as biomimetic compliant artificial cartilage is expected to reproduce similar adaptive multimode lubrication mechanism to natural synovial joints. In this paper, the tribological behaviors of three kinds of PVA hydrogels different in preparation methods were evaluated was evaluated in reciprocating tests lubricated with saline and simulated synovial fluid. The interstitial fluid pressure and friction for PVA hydrogels were estimated by biphasic finite element analysis. The superior lubricating performance of PVA hybrid gel was discussed from biphasic and boundary lubrication.
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