Standard Practice for Finite Element Analysis (FEA) of Metallic Orthopaedic Total Knee Tibial Components

Importancia y uso:

3.1 This practice is applicable to the calculation of stresses seen on a knee tibial component when loaded in a manner described in this practice. This practice can be used to identify the worst-case size for a particular implant. When stresses calculated using this FEA method were compared to the stresses measured at two locations on the tibial tray using physical strain gauging techniques performed at one laboratory, the difference observed was -6.8 % at one location (with the strain gauges reporting the higher stress) and 3.1 % at the other location (with the FEA method reporting a higher stress). This difference should be considered when determining the worst-case size(s) of the same implant design.

3.2 The loading of tibial tray designs in vivo will, in general, differ from the loading defined in this practice. However, this practice is designed to allow for comparisons between the fatigue performance of different metallic tibial component designs, when tested under similar conditions.

Subcomité:

F04.22

Volúmen:

13.02

Número ICS:

11.040.40 (Implants for surgery, prosthetics and orthotics)

Palabras clave:

computational modeling and simulation; displacement; FEA; finite element analysis; model calibration; model verification; orthopaedic implants; solution sensitivity; strain; stress;