Dr Adriaan Liebenberg My Spine Explained | Page 43

intervertebral disc vertebra listhesis Grade I listhesis Grade IV listhesis Images used with permission from Stryker pedicle screw Image used with permission from Medtronic Figure 7.1 The top illustration demonstrates the slip of the lumbar vertebrae. The pic- ture on the left depicts a Grade 1 listhesis; the picture on the right depicts a Grade IV listhesis. Treatment consis ts of decompression of the nerves and fix- ation of the spine by pedicle screws, as demonstrated in the bottom picture. 42