Biomechanics of grade I degenerative lumbar spondylolisthesis. Part 1: in vitro model.


OBJECT The authors sought to create and to evaluate an in vitro model of Grade I degenerative (closed-arch) spondylolisthesis. METHODS The model of spondylolisthesis was created by two primary procedures: 1) resection of the disc; and 2) stripping of anterior and posterior longitudinal ligaments away from the vertebral bodies (VBs). In 13 vertebral levels… (More)