ASTM F564 Bone staples

We offer you various test methods for the mechanical characterization of staples according to the test standard ASTM F564. We help you to select the appropriate test methods for your individual staples design from the following offer:

• Static bending test
  A staple is clamped into the test device and loaded in a four-point bending test at a constant speed of 25.4 mm/min. A force-displacement curve is recorded and the bending stiffness and flexural strength are determined.
  
  
• Dynamic bending fatigue test
  Two different dynamic bending tests are offered, a four-point bending test and a combination of a tensile or compressive and bending load. In both tests, the staples are firmly clamped in the test device and subjected to a cyclic load (50 % or 75 % of the static flexural strength). The test is terminated when the staple breaks or a defined number of cycles has been reached. The test is carried out in a liquid at 37°C.
  
  
• Pull-out fixation strength test (staple/bone)
  A staple is inserted into a bone (or analog test material) and then pulled-off at a constant rate. In this case, a force-displacement curve is recorded, in which a sudden decrease in force indicates the pull-off force. This test can also be carried out in a liquid in order to represent the physiological conditions.
  
  
• Soft tissue fixation strength test
  A connection between soft tissue and bone (physiological or analogous materials) is generated with a staple (or several staples). Subsequently, a tensile load is applied to the soft tissue at a constant speed, perpendicular to the bone clamp, and a force-displacement curve is recorded. The test is terminated when the bone clamp is pulled-out or one of the materials fails. This test can also be carried out in liquid on demand in order to better represent the physiological conditions.