ASTM F543-A3 Axial Pullout Strength test of Metallic Bone Screws

ASTM F543 Appendix 3 Axial Tensile Strength of Medical Screws

Appendix 3 measures the axial tensile force required to disable or remove bone screws from their application. If the screw is subjected to axial tension, or if the screw is fixed in poor quality or osteoporotic bone, axial tensile strength testing is very important.

ASTM F543 Appendix 3 Testing Equipment Requirements

Appendix 3 requires the use of a basic universal testing machine that can withstand the force required to pull out or break medical screws.

UnitedTest provides universal/tensile testing machines or bone screw test machine for this application, each of which meets the ASTM E4 force measurement accuracy requirements. Use our controller to record the displacement data of the load and fixture.

For axial pull-out testing, a customized fixture is required to grip the head of the screw and pull it out after reaching the desired depth of thread engagement.

Apply a tensile load to the test screw at a rate of 5 mm/min (0.19 in/min) until the screw fails or is released from the test block.

For more information or details, please contact us:

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