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ISO 7206-4 and ISO 7206-6 Endurance Properties Testing on Stemmed Femoral Components and Neck Region of Stemmed Femoral Components

The standards ISO 7206-4 and ISO 7206-6 describe the endurance properties test/fatigue test on stemmed femoral components and neck region of the stemmed femoral components of hip endoprostheses.

ISO 7206-4:
ISO 7206-6:

ISO 7206-4:

ISO 7206-4:

The test standard ISO 7206-4 specifies the cyclic load and number of cycles to determine the endurance properties of the femoral stem.A minimum of six femoral stems must withstand five million load cycles at a maximum load of 2300 N and a minimum load of 300 N.

ISO 7206-6:

ISO 7206-6:

The test standard ISO 7206-6 is used to determine the endurance properties in the femoral neck area.This test simulates a well worn in femoral stem.According to the standard, at least six femoral stems must withstand ten million load cycles with a load of 5.34 kN (R=0.1)

Testing to ISO 7206-4 and ISO 7206-6 with ZwickRoell

  • The test test to ISO 7206-4 and ISO 7206-6 can be performed with a servohydraulic testing machine or an LTM electrodynamic testing machine.In addition to the standard requirements, higher cycle loads and number of cycles can also be carried out with these testing systems.
  • The mechanical general requirements defined in the standard, including the orientation of the hip endoprosthesis to the test load, the embedding height and the load-application angle, can be accurately defined by means of a ZwickRoell embedding device.
  • The specially developed test fixture from ZwickRoell makes it possible to test according to ISO 7206-4 and ISO 7206-6.The compensating bearing ensures a purely axial load on the femoral stem.
  • The ZwickRoell testing software testXpert R allows you to run user-friendly progressive load tests (Locati tests).
  • The test can also be performed under physiological ambient conditions (e.g. temperature-controlled saline solution at 37 Β°C) using a ZwickRoell medium container.This is especially necessary if the hip implant has conical taper connections in the stem or neck area.
  • 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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