Basics Description Spondylolisthesis is an abnormal AP translation of 2 vertebral bodies relative to each other. This translation is secondary to a defect in the pars interarticularis (spondylolysis) or the posterior ligamentous-bony restraints. Spondylolisthesis is classified by type (Table 1) and by the severity of the slip (Table 2). General Prevention No preventive measures [...]
