Axial Compressive Subsidence Testing
The spine device is positioned between two polyurethane foam test blocks customized to fit the geometry of the device. A static axial compressive load is applied to measure the deflection into the test blocks. Device stiffness is collected from similar test methods using metallic test blocks (ASTM F2077 or ASTM F2346) and is used to calculate the propensity of the device to subside.
