ISO 14242-4

ASTM F1820

Disassembly forces of modular acetabular devices

ASTM F1875

Fretting corrosion testing of modular implants – Femoral stem-head interface

ASTM F2009

Modular connection disassembly test

ASTM F2068 (PI-98)

Requirements for femoral prostheses - Metallic implants

ASTM F2345

Femoral head fatigue test

ASTM F2580

Modular stem fatigue test

ASTM F2582

Impingement test

ASTM F2979

Bearing surface characterization of retrieved hard-on-hard hip prostheses

ASTM F2996

FEA non-modular hip femoral stem

ASTM F3018

Guide for assessment of hard-on-hard articulation THR devices

ASTM F3047M

High demand hip wear testing

ASTM F3090

Fatigue test of acetabular devices

ASTM F3446

3D frictional torque measurement of total hip joint prostheses

ISO 11491

Impact resistance femoral heads

ISO 14242-1

Hip wear test

ISO 14242-1

Third body wear test based on ISO 14242-1

ISO 14242-4

Microseparation test

ISO 21534

Particular requirements for joint replacement implants

ISO 21535

Hip range of motion

ISO 21535

Specific requirements for hip-joint replacement implants

ISO 7206-1

Classification and designation of dimensions

ISO 7206-10

Femoral head compression test

ISO 7206-12

Deformation test for acetabular shells

ISO 7206-13

Femoral head torsion test

ISO 7206-2

Hip surface analysis

ISO 7206-4

Femoral stem fatigue test

ISO 7206-6

Femoral stem neck fatigue test

ISO 7206-8

Femoral stem fatigue test

PI-11

Insert compression test

PI-3

Acetabular cup luxation test

PI-58 (ISO 7206-8)

Fatigue test

PI-87

FEA non-modular hip femoral stem - neck region

PI-99 (ASTM F2091)

Standard specification for acetabular prostheses

Microseparation test

Normative References

ISO 14242-4: Implants for surgery – wear of total hip-joint prostheses – Part 4: Testing total hip joint prostheses under variations in surgical positioning

Hard-on-hard bearings in Total Hip Replacements (THR) have shown very low wear rates when tested according to ISO 14242-1 under standard gait conditions. ISO 14242-4 specifies a more severe loading scenario, simulating edge loading due to steep acetabular cup inclination and dynamic separation (micro-separation).
Clinically, micro-separation is assumed to occur during the swing phase when the load is minimal and is associated with joint laxity, medialized cups or femoral head offset deficiency. For in-vitro testing, micro-separation is generated by a spring, which produces a medial-superior translation of the cup relative to the femoral head, resulting in localized contact between the head and the superior rim of the cup. The distraction of the head from the cup is measured using the latest high-accuracy digital contact sensors.

Your contact person

Jason Steffens, M.Sc.

Head of Tribology, Head of FEA