The meniscus implant was found to behave as a non-linear viscoelastic material, with mechanical properties similar to those of the natural meniscus. The implant was found to maintain its geometry when subjected to soaking in SPF. The combination of soaking, together with fatigue loading resulted in mild geometrical changes as a result of creep. These changes, in the order of magnitude of a fraction of mm, can be considered as long-term adaptation of the implant under load. All of the mechanical characterization tests showed a mild transition in the mechanical properties during the first 300,000 load cycles, which then stabilizes for the rest of the duration of 2 million cycles. These relatively small changes in geometry reflect the adaptation measured after 2 million cycles and appear to represent the effects of long-term use.
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