ASTM-F1440 › Standard Practice for Cyclic Fatigue Testing of Metallic Stemmed Hip Arthroplasty Femoral Components Without Torsion (Withdrawn 2012)
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Scope
1.1 This practice describes a method for the fatigue testing of metallic stemmed femoral components used in hip arthroplasty. The described method is intended to be used to evaluate the comparison of various designs and materials used for stemmed femoral components used in the arthroplasty. This practice covers procedures for the performance of fatigue tests using (as a forcing function) a periodic constant amplitude force.
1.2 This practice applies primarily to one-piece prostheses and modular components, with head in place such that prostheses should not have an anterior/posterior bow, and should have a nearly straight section on the distal 50 mm of the stem. This practice may require modifications to accommodate other femoral stem designs.
1.3 The values stated in SI units are to be regarded as the standard.
1.4 For additional information see Refs. (1-5) .
Significance and Use
This practice can be used to describe the effects of materials, manufacturing, and design variables on the fatigue resistance of metallic stemmed femoral components subjected to cyclic loading for relatively large numbers of cycles. The recommended test assumes a “worst case” situation where proximal support for the stem has been lost. It is also recognized that for some materials the environment may have an effect on the response to cyclic loading. The test environment used and the rationale for the choice of that environment should be described in the report.
It is recognized that actual in vivo loading conditions are not ofconstant amplitude. However, there is not sufficient information available to create standard load spectrums for metallic stemmed femoral components. Accordingly, a simple periodic constant amplitude force is recommended.
In order for fatigue data on femoral stems to be useful for comparison, it must be reproducible among different laboratories. Consequently, it is essential that uniform procedures be established.
Keywords
arthroplasty; femoral components; hip arthroplasty; metallic stemmed femoral components; orthopaedic medical devices; Arthroplasty; Fatigue--surgical implant materials; Femoral surgical components; Hip replacement prosthesis; Metallic surgical implant materials; Stemmed hip arthroplasty components; Testing methods--surgical implants; ICS Number Code 11.040.40 (Implants for surgery, prothetics and orthotics)
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13.01 (Medical and Surgical Materials and Devices)
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Document Number
ASTM-F1440-92(2008)
Revision Level
1992 R08 EDITION
Status
Cancelled
Modification Type
Withdrawn
Publication Date
June 1, 2008
Document Type
Practice
Page Count
6 pages
Committee Number
F04.22