ASTM F 2009 : 2025 : REDLINE

1.1This test method establishes a standard methodology for determining the force required, under laboratory conditions, to disassemble tapers of implants that are otherwise not intended to release. Some examples are the femoral components of a total or partial hip joint replacement or humeral components of an anatomic total or partial shoulder joint replacement in which the head and base component are secured together by a self-locking taper.

1.2In this test method, it is recognized that actual loading during surgery and in vivo is quite varied, and that no one set of experimental conditions can encompass all possible variations. Thus, the test method included here represents a simplified model for purposes of comparison between designs and materials. Test methods involving more complex systems may require additional justification.

1.3This test method has been developed primarily for evaluation of metal and ceramic head designs on metal tapers but can have application to other materials and designs.

1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.