Hip endoprostheses can be anchored in the femur with or without the use of bone cement. In addition to fatigue tests on the prosthesis itself, the strength of the fastening in the bone must also be tested. For this an endoprosthesis is anchored in natural or artificial bone, the load axis is adjusted by means of a clamping fixture and the entire test device is clamped in an Allround-Line Z020 testing machine. During the cyclic loading, loads can be measured, together with any micro-movements (via movement sensors) between prosthesis and bone.