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Hip joint prostheses
all procedures accredited

Fatigue test ISO 7206-4, 6 and PI-58 (ISO 7206-8) Femoral head torsion test ISO 7206-13 Femoral head compression test PI-14 / ISO 7206-10 Femoral Head pull-off test ASTM F 2009 Luxation test PI-3 Hip surface analysis ISO 7206-2 Hip simulator test ISO 14242-1 Disassembly Forces of Modular Acetabular Devices ASTM F1820 Hip stem corrosion test ASTM F1875 Hip range of motion ISO 21535 Fatigue test ASTM F 2580 Impingement Test ASTM F2582 Insert fatigue test PI-11 Microseparation test PI-78 (ISO 14242-4) Third body wear test based on ISO 14242-1 High demand hip wear testing ASTM F3047M Deformation test for acetabular shells ISO 7206-12 3D Frictional torque measurement of total hip joint prostheses PI-64 Guide for assessment of hard-on-hard articulation THR devices ASTM F3018 Impact resistance femoral heads ISO 11491 FEA non-modular hip femoral stem ASTM F2996 Requirements for Femoral Prostheses – Metallic Implants ASTM F2068 Bearing surface characterization of retrieved hard-on-hard hip prostheses ASTM F2979 Specific requirements for hip-joint replacement implants ISO 21535 Particular requirements for joint replacement implants ISO 21534

Third body wear test based on ISO 14242-1

Testing is based on ISO 14242-1.

Normative References  



ISO 14242-1: Implants for surgery - wear of total hip prostheses - Part 1: Loading and displacement parameters for wear-testing machines and corresponding environmental conditions for tests

ISO 14242-2: Implants for surgery - wear of total hip prostheses Part 2: Methods of measurement

In total hip arthroplasty (THA), accelerated wear is observed when third-body particles migrate into the bearing surface. Third-body particles can be bone cement, bone chips, debris generated at modular connections or fragments from previous implant failures. All specimens are tested according to ISO 14242-1 using the EndoLab® hip joint simulator.

Particle concentration, size and material (PMMA, ceramic, bone chip) is defined in cooperation with the customer and shall correspond to worst case conditions. To maintain the third-body particle suspension in the test fluid, each test chamber can be circulated by individual peristaltic pumps.

As an alternative, roughening of the components to a predefined Ra-value can be performed. This method allows for more consistent wear determination as third body particles do not adhere to the surfaces.

 


Implant Testing - Third body wear test based on ISO 14242-1


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