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FEA of the Tibial Post of a Knee Prosthesis

Tibial post failure has been reported in several retrieval studies for knee surgeries using posterior-stabilized (PS) prostheses. Fractures of the tibial post are considered to be caused by high stress-induced destruction (bending and tensile forces). The design of polyethylene inserts requires a certain level of plastic deformation to take place without the risk of deformation. The design of the tibial post varies markedly among manufacturers.

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