ASTM WK51649

    New Test Method for Fatigue Testing of Total Knee Femoral Components under Closing Conditions

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    Developed by Subcommittee: F04.22 | Committee F04 | Contact Staff Manager



    WK51649

    1. Scope

    1.1 This test method applies to metallic total knee femoral components used in total knee arthroplasty (TKA). Femoral components made of non-metallic materials (for example, ceramic, polymer) could possibly be evaluated using this test method. However, such materials may include risks of new failure mechanisms that are not considered in this test method. 1.2 The procedure described in this test method is performed on total knee femoral components to determine their maximum fatigue load under closing-style loading conditions. Different designs can be characterized as, but not limited to, posterior cruciate ligament retaining (CR), posterior stabilizing (PS), and revision. 1.3 This test method does not address evaluation of femoral components under opening-style loading conditions that have also generated clinical failures. 1.4 Units--The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    Keywords

    total knee femoral component; total knee replacement; TKR; total knee arthroplasty; TKA; finite element analysis; FEA; fatigue

    Rationale

    While rare in occurrence, fractures of knee replacement femoral components have been clinically observed. This test method allows the user to replicate loading conditions that can lead to one type of clinically observed fracture under closing-style loading conditions.

    The title and scope are in draft form and are under development within this ASTM Committee.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    10-01-2015

    Technical Contact:
    Andrew Smith

    Status:
    Draft Under Development