Fatigue Tests on Hip Endoprotheses

The Zwick Amsler HC Compact servo-hydraulic testing machine is used to simulate dynamic loadings on a hip prosthesis stem in accordance with the relevant standards, ISO 7206-4, ISO 7206-6, ISO 7206-8 and ASTM F2068.

Use of the appropriate embedding device enables the mechanical conditions specified in the standard, such as the orientation of the hip joint prosthesis to the test load or the embedding height, together with the angle of load application, to be defined with accuracy.

Dynamic loading on the hip endoprosthesis stem while walking with an implant that is already loosening is simulated to check the stem life expectancy. However, alternating loading is applied to the neck region of the prosthesis, which is clinically well-anchored.

Zwick software allows you to run user-friendly progressive load tests (Locati tests). These tests can be implemented under physiological environmental conditions such as temperature-conditioned saline solution with the use of the Zwick temperature conditioning vessel. This enables you to perform a corrosion test to ASTM F1875, which tests a modular junction’s resistance to crevice corrosion and fretting corrosion under dynamic load.

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