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ISO 7206-13 Torsion Test on the Femoral Head

The ISO 7206-13 standard specifies a test method for the determination of resistance to torque between the femoral head and neck, or the stem.

Objective and applications Requirements Testing systems Downloads

ISO 7206-13: Objective and applications

ISO 7206-13:

  • Artificial hip joints must withstand both compressive loads and torsion loads.
  • A minimum of five tests should be run per head/cone type. Before the test, the head and cone must be joined with a specified force analogous to ISO 7206-10.Preparation of the femoral head is also required to ensure correct fixation.

Test requirements according to ISO 7206-13

The testing system consists of a 20 kN nominal force materials testing machine and a 500 Nm torsion drive.

The artificial hip joint (here made of metal) is rotated on a support unit (torsion loading) with simultaneous compression loading. This tests materials and alloys best suited for artificial hip joints.

  • Characterization of the resistance of a hip joint head to torques in normal in-vivo application
  • Supports the opportunity to develop a better anchor between the two components
  • Application of a static compression preload; the transverse torque then increases until the head turns
  • Static biaxial testing machine (20 kN) with 500 Nm torque motor

Testing systems

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