Failure analysis of alumina-alumina hip prosthesis by 3-dimensional simulation

Mitsugu Todo, Masaaki Mawatari, Takao Hotokebuchi

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Kyocera ABS system, a ceramics-on-ceramics type hip prosthesis, has been prohibited due to consecutive accidents such as the dissociation of the UHMWPE liner and the fracture of the alumina inlay. It has been presumed that loosening of the locking system connecting the metal shell and the liner is the primary mechanism of the liner dissociation. In this study, the finite element analysis (FEA) of the ABS system was conducted to assess the loosening mechanism qualitatively and quantitatively. The FEA results showed that very high stress concentration was generated at the locking grooves of the liner, indicating severe damage was likely formed under high stress condition. The FEA including a damage model was also performed to simulate such damage formation at the locking grooves. The FEA result exhibited that the four grooves were severely damaged under tensile and compression loadings, resulting in the loosening of the locking system. It was thus confirmed that the dissociation of the liner was initiated by those damage formation at the grooves.

    Original languageEnglish
    Pages (from-to)336-340
    Number of pages5
    JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
    Volume55
    Issue number5
    DOIs
    Publication statusPublished - May 2008

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering
    • Industrial and Manufacturing Engineering
    • Metals and Alloys
    • Materials Chemistry

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