Micro- and nanoscopic biotribological behaviours in natural synovial joints and artificial joints

T. Murakami, Yoshinori Sawae, Kazuhiro Nakashima, S. Yarimitsu, T. Sato

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    To maintain low friction and low wear in natural synovial joints and joint prostheses with artificial cartilage, adsorbed film formation at micro- and nanoscopic levels appears to play an important role in mixed or boundary lubrication regime where local direct contact occurs. In natural synovial joints, the lubricating gel film is likely to preserve low friction and to protect the bulk cartilage even after the removal of the adsorbed film. For poly (vinyl alcohol) (PVA) hydrogel as artificial cartilage without lubricating gel layer, the adsorbed film is a single protective barrier. In the previous researches on the rubbing pair of PVA against itself or glass plate, the coexistence of albumin (A) and γ-globulin (G) as A:G = 1: 2 at total protein concentration of 2.1 wt% in hyaluronate solution showed the lowest wear. In this study, in situ observation of adsorption of proteins was conducted to clarify the dynamic changes in adsorptional behaviours in lubricants containing different protein constituents. In the mixed lubrication regime, the coexistence of albumin and γ-globulin as A:G = 1:2 showed the lowest friction. The role of appropriate constituents of proteins is discussed on low friction and low wear at micro- and nanoscopic levels on the basis of previous and present results.

    Original languageEnglish
    Pages (from-to)237-245
    Number of pages9
    JournalProceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
    Volume221
    Issue number3
    DOIs
    Publication statusPublished - May 1 2007

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films

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