Spondylolisthesis lumbar spine

As the lumbar spine slips anteriorly, the head, arms, trunk, and thus, the load line travel with it. So, on a sagittal plane X-ray of a spondylolisthesis patient one can make a similar estimate of the shear and compression vectors on SI and the leverage on the posterior elements and hardware (Fig. 7). 

Dysplastic spondylolisthesis is a congenital abnormality most typically of the first sacral or fifth lumbar neural arch. This defect generally becomes apparent during childhood or adolescence. This can be diagnosed on lateral view x-rays of the lumbar spine. 

Oblique lumbar spine x-rays taken in the upright position are used to diagnose spondylolysis and spondylolisthesis. The defect in the pars is seen typically as the collar around the neck of a Scolfie dog (Fig. 56-3). 

Sairyo K, Goel VK, Grobler LJ, Ikata T, Katoh S (1998) The pathomechanism of isthmic lumbar spondylolisthesis. Spine 23(13) 1442-1446... 

Transfeldt EE, Dendrinos GK, Bradford DS (1989) Paresis of proximal lumbar roots after reduction of L5/S1 spondylolisthesis. Spine 14 884-887 Verbiest H (1979) The treatment of spondyloptosis or impending lumbar spondy-loptosis accompanied by neurologic deficit and/or neurogenic intermittent claudication. Spine 4 68... 

---