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Disassembly Forces of Modular Acetabular Devices - ASTM F1820

Normative References  



ASTM F1820: Standard Test Method for Determining the Forces for Disassembly of Modular Acetabular Devices

This test method covers three different tests to determine the mechanical strength of the fitting between the acetabular shell and liner.

The push-out test determines the axial locking strength of the acetabular liner within the acetabular shell.
The offset pull-out or lever-out disassembly test determines the resistance of the locking mechanism to edge forces. They could occur when the neck of the femoral stem impinges on the edge of the acetabular liner.
The torque-out test determines the resistance of the locking mechanism against torsional forces.  


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