This part of ISO 14243 specifies a method for assessing wear of the tibial component of total knee joint prostheses using the gravimetric technique for components tested according to ISO 14243-1 or ISO 14243-3 as appropriate.
The test sample is immersed in a lubricant. It is repeatedly removed from the lubricant, cleaned, dried and weighed until a constant liquid absorption is achieved. The test specimen is then tested for mass loss in a knee joint simulator and then evaluated for wear. A control sample, loaded or unloaded, articulated, immersed in the same lubricant medium is designed to allow fluid absorption and is subjected to the same procedure for reference purposes.
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