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Knee implants
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Knee Constraint Test - ASTM F1223Knee Constraint Test - ASTM F1223 Dislocation Mobile Bearing - ASTM F2724Dislocation Mobile Bearing - ASTM F2724 Knee Contact Pressure Test - PI-17Knee Contact Pressure Test - PI-17 Tibial Component Finite Element Analysis - ASTM F3334Tibial Component Finite Element Analysis - ASTM F3334 Tibial Tray Fatigue Test - ISO 14879-1/ ASTM F1800Tibial Tray Fatigue Test - ISO 14879-1/ ASTM F1800 Patella specification - ASTM F1672Patella specification - ASTM F1672 Knee surface analysis - ISO 7207-2Knee surface analysis - ISO 7207-2 Knee wear test - ISO 14243-1/3Knee wear test - ISO 14243-1/3 Fatigue Test under High Flexion - ASTM F2777Fatigue Test under High Flexion - ASTM F2777 Fatigue Test Baseplate/Bearing Fixation - ASTM F2723Fatigue Test Baseplate/Bearing Fixation - ASTM F2723 Fatigue Test Baseplate/Bearing Fixation under Torsional Loading - ASTM F2722Fatigue Test Baseplate/Bearing Fixation under Torsional Loading - ASTM F2722 Knee loading profiles - ASTM F3141Knee loading profiles - ASTM F3141 FEA knee femoral component - ASTM F3161FEA knee femoral component - ASTM F3161 Unicondylar tibial tray fatigue test - ASTM F3140Unicondylar tibial tray fatigue test - ASTM F3140 Knee Condyle Fatigue Test - ASTM F3210/ PI-73Knee Condyle Fatigue Test - ASTM F3210/ PI-73 Durability performance patellofemoral joint - ISO 14243-5Durability performance patellofemoral joint - ISO 14243-5 Stemmed femoral knee component fatigue test - PI-53Stemmed femoral knee component fatigue test - PI-53 Specific Requirements for Knee-joint Replacement Implants - ISO 21536Specific Requirements for Knee-joint Replacement Implants - ISO 21536 Test of Modular Knee Implants - ASTM F1814Test of Modular Knee Implants - ASTM F1814 Particular requirements for joint replacement implants - ISO 21534Particular requirements for joint replacement implants - ISO 21534 Knee Specification - ASTM F2083Knee Specification - ASTM F2083

Stemmed femoral knee component fatigue test - PI-53

Normative References  



PI-53: Fatigue testing of stemmed femoral TKA components

The purpose of the test described in this internal test procedure is to determine the mechanical strength of stemmed femoral TKA components loaded under assumed worst case conditions.
The femoral component and the stem have to be assembled according to the customer´s instructions and tightened with a calibrated torque wrench (if required).

The load has to be applied at an angle of 25° to the neutral position of the femoral component as indicated by the client. This simulates a slightly flexed knee position. A varus malalignment has to be simulated by a 5° inclination of the specimen holder. This alignment leads to load only the medial condyle.
The suggested embedding level of the stem (if present) is 80 mm.

A load of 2,000 N (R=1/10) at a rate of ≤ 10 Hz is suggested to be used for the dynamic tests. Modular implants have to be tested in Ringer® solution at 37 °C.
The run-out criteria has to be set to 10,000,000 cycles.  


Implant Testing - Stemmed femoral knee component fatigue test - PI-53