Fig. 10
From: Material characterization and selection for 3D-printed spine models
These graphs show the comparisons of the FDM-printed PLA unpolished, PLA polished, and nylon to that of the human cadaveric vertebrae for force in both the (a) x and (b) y-directions. The x-axis is time (in seconds) and y-axis is Force (in Newtons). The spectra are not completely overlapped due to miniscule varying placements of the specimens and time lag during testing. A few millimeters difference in position can lead to a difference in when the bur hits the sample