Jump to the content of the page

ISO 7206-4, ISO 7206-6:

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.

In the ISO 7206-4 standard, the dynamic load on the hip endoprostheses stem while walking with an implant that is already loosening is simulated in the proximal bone bed in order to test the stem life expectancy. The ISO 7206-6 standard is used to determine the finite life fatigue in the femoral neck area. This test simulates a well ingrown femoral stem.

ISO 7206-4 Femoral stem fatigue
ISO 7206-6 Femoral neck fatigue

ISO 7206-4 Femoral stem fatigue

Implants for surgery – Partial and total hip joint prostheses – Part 4:Determination of endurance properties of stemmed femoral components

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 Femoral neck fatigue

Implants for surgery – Partial and total hip joint prostheses – Part 6:Endurance properties testing and performance requirements of neck region of stemmed femoral components

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 °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.

You may also be interested in

Tensile test femoral head
ASTM F2009
The ASTM F2009 standard specifies a test method for determining the required disassembly force of the taper connection between the femoral head and femoral shaft.
to Tensile test femoral head
Fatigue strength ceramic femoral heads
ASTM F2345
The ASTM F2345 standard covers determination of the static and cyclic fatigue strength of ceramic modular femoral heads.
to Fatigue strength ceramic femoral heads
Fatigue testing modular femoral stems
ASTM F2580
The ASTM F2580 standard specifies a test method for fatigue testing of metallic femoral stems with metaphyseal fixation.
to Fatigue testing modular femoral stems

We look for and find the optimal testing solution for every one of your requirements.

Get in contact with our industry experts.

We look forward to discussing your needs.

 

Contact us

Top