Standard Test Methods for Dynamic Evaluation of Glenoid Loosening or Disassociation
Standard Test Methods for Dynamic Evaluation of Glenoid Loosening or DisassociationF2028-08R12E01ASTM|F2028-08R12E01|en-USStandard Test Methods for Dynamic Evaluation of Glenoid Loosening or DisassociationStandardF2028 Standard Test Methods for Dynamic Evaluation of Glenoid Loosening or Disassociation>newBOS Vol. 13.01 Committee F04
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Significance and Use
5.1 This test method is intended to investigate the resistance of a glenoid component to loosening. Glenoid loosening is the most common clinical complication in total shoulder arthroplasty (see X1.1). The method assumes that loosening occurs because of edge loading, often called the rocking-horse phenomenon.
5.2 This test method can be used both to detect potential problems and to compare design features. Factors affecting loosening performance include articular geometry, flange geometry, materials, fixation design, bone quality, and surgical technique.
Scope
1.1 These test methods measure how much a prosthetic glenoid component rocks or pivots following cyclic displacement of the humeral head to opposing glenoid rims (for example, superior-inferior or anterior-posterior). Performance is judged by the tensile displacement opposite each loaded rim after dynamic rocking.
1.2 The same setup can be used to test the locking mechanism of modular glenoid components, for example, for disassociation.
1.3 These test methods cover shoulder replacement designs with monolithic or modular glenoid components for cemented fixation.
1.4 The values stated in SI units are to be regarded as 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.
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