1.1 This test method describes a laboratory method for evaluating the potential for acetabular cup systems to corrode, generate debris, or fracture under repeated forces in a simulated environment. This test method may not be relevant to acetabular systems that are all polymer. The relevancy to acetabular systems that have a metallic shell with a polymeric articulation surface may also be limited because of the creep of the polymer. Likewise, portions of this test method either may not be applicable or may need to be revised for testing monoblock acetabular cups. The primary applicability of this test method is to metal-on-metal acetabular systems and ceramic-on-ceramic acetabular cups with metallic acetabular shell components. 1.2 Although the methodology described does not replicate all physiological force conditions, it is a means of in-vitro comparison of acetabular device designs under repeated forces in a simulated environment. 1.3 The values stated in SI units are regarded as the standard. 1.4 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.
There does not exist a current standard test method for evaluating the fatigue resistance of acetabular systems for total hip replacement. There have been fractures of such devices clinically.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
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