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Knee contact pressure test PI-17

Normative References  

PI-17: Determination of Total Knee Implant Contact Pressure

ASTM F2083: Standard Specification for Knee Replacement Prosthesis

Pressure distribution and pressure level are two of the factors influencing wear of total knee replacements. Using pressure films, the contact area as well as the amount of pressure (in MPa) can be determined exactly. To gain reproducible results avoiding the disadvantages of pressure films, EndoLab® developed a computerized calibration method. An individual calibration is performed for every sheet and test series. Digital image processing is used to analyse the results.
The aim of the test is to evaluate the pressure distribution and total contact area between the femoral component and tibial insert, and between the femoral component and the patella insert of a total knee replacement system under different flexion angles and loads. These results can be used to develop optimized geometries.