Standard Test Method for Fatigue Testing of Total Knee Femoral Components Under Closing Conditions

Importancia y uso:

5.1 Clinical fractures of total knee femoral components have been observed and reported in the literature (1-12).4 (See X1.4.)

5.2 This test method provides a procedure to perform fatigue testing on total knee femoral components under closing conditions caused by an unsupported condyle that result in a tensile stress on the articular surface and a compressive stress on the interior, beveled surfaces.

5.3 This test method is intended to evaluate the fatigue performance of knee femoral components under a simulated articulation loading condition. The load acts to move the posterior femoral condyle toward the anterior flange.

5.4 This test method simulates a clinically severe condition in which all bony support is lost and one condyle is supporting the complete load at the knee joint at 90° of tibiofemoral flexion.

5.5 Testing in accordance with this test method typically produces regions of high tensile stress in the intercondylar notch and on the articular surface where the anterior flange transitions to condyle.

5.6 The loading of total knee femoral components using this test method may differ from actual in vivo loading conditions. The results obtained here cannot be used to directly predict in vivo performance. However, this test method is designed to enable comparison between the fatigue performance of different total knee femoral component designs when tested under similar closing conditions.

Subcomité:

F04.22

Referida por:

F3495-23, F3161-24

Volúmen:

13.02

Número ICS:

11.040.40 (Implants for surgery, prosthetics and orthotics)

Palabras clave:

fatigue; FEA; finite element analysis; TKA; TKR; total knee arthroplasty; total knee femoral component; total knee replacement;