A study on the use of the Osstell apparatus to evaluate pedicle screw stability: An in-vitro study using micro-CT - Fig 8

<p><b>Micro-CT sagittal image of the biomechanical test materials after screw insertions and removal 1 time (a), 7 times (b), and 10 times (c). (d) The results of screw insertion area for each number of insertions.</b> (a,b,c) top: low-power field, scale bar: 10 mm; bottom: high-power field, scale bar: 2 mm. (d) *p <0.05, ** p <0.01.