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
