Dynamic Fatigue Tests on Hip Endoprostheses to ISO 7206-4, ISO 7206-6, ISO 7206-8 and ASTM F2068

The hip joint consists of the femur and the pelvis. Diseases can make it necessary to replace parts of or the entire hip joint with an implant. 
Embedding device for hip endoprosthesis stems to ISO 7206 (5)

Dynamic Fatigue Tests on Hip Endoprostheses to ISO 7206-4, ISO 7206-6, ISO 7206-8 and ASTM F2068

The ZwickRoell servohydraulic testing machine HC Compact or the LTM 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 ZwickRoell 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. 

 

ISO 7206 Implants for Surgery – Partial and Total Hip Joint Prosthesis

ZwickRoell's hip endoprosthesis test fixture fulfills the requirements of ISO 7206 Implants for surgery - Partial and total hip joint prostheses.

Determination of endurance properties of stemmed femoral components

A minimum of six hip endoprosthesis stems must withstand 5 million load cycles with a maximum load of 2300 N and a minimum load of 300 N.

  • Number of cycles: 5 million (6 specimens)
  • Test frequency: up to 30 Hz
  • Load (ASTM F2068-03; ISO 7206-8): Fo: 2300 N; Fu: 300 N

Determination of endurance properties of head and neck region of stemmed femoral components

A minimum of six hip endoprosthesis stems must withstand 10 million load cycles at a load of 5.34 kN (R=0.1).

  • Number of cycles: 10 million (6 specimens)
  • Test frequency: up to 30 Hz
  • Load (ASTM F2068-03): Fo: 5340 N; Fu: 534 N

Endurance performance of stemmed femoral components with application of torsion

  • A precision-manufactured embedding device is used to embed the stem, ensuring exact orientation of the implant to the test loads.
  • Head and foot flange assembly for simple and durable installation, taking into consideration the necessary degrees of freedom for the test.

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Lever out test

Lever-out testing on hip joint pairings

SpineServ employs ZwickRoell machines to test implants

Demand for endoprostheses is increasing worldwide; of these, ninety percent are knee and hip prostheses. The requirement for ever more durable implants is also increasing the demands on testing technology, particularly with regard to high frequencies and loads in fatigue testing. ZwickRoell's servo-hydraulic testing machines offer a highly efficient solution for such tests.
Millionfold tested cage1
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