Purpose While much evidence suggests that adjacent segment degeneration is merely a
manifestation of the natural degenerative process unrelated to any spine fusion, a significant …

Study Design. Radiographic results from a prospective, randomized, multicenter trial
assessing patients who underwent lumbar total disc replacement (TDR) or circumferential …

The pathogenesis of lumbar adjacent segment disease is thought to be secondary to altered
biomechanics resulting from fusion. Direct in vivo evidence for altered biomechanics …

Study Design. In vivo fluoroscopic analysis of lumbar spinal motion with total disc
replacement (TDR), fusions, and controls. Objectives. Compare and contrast lumbar spinal …

Study Design. Nondestructive flexibility tests were performed in vitro, comparing multiple
conditions of fixation in a single group of specimens. Objective. To compare the …

Purpose The purpose of our study was to compare lumbar fusion and motion-preserving
procedures to determine whether lumbar fusion may be associated with a higher prevalence …

Study Design. We present an in vitro biomechanical comparison of adjacent segment motion
at the cranial segment (L3–L4) for an L4–L5 versus an L4–S1 fusion model using cadaveric …

Purpose Accelerated degenerative changes at intervertebral levels adjacent to a spinal
fusion, the so-called adjacent segment degeneration (ASD), have been reported in many …

Study Design. Retrospective radiographic analysis of lumbar spine range of motion (ROM)
after monosegmental fusion and posterior dynamic stabilization at the level L4–L5 …

Adjacent segment disorders are prevalent in patients following a spinal fusion surgery.
Postoperative alterations in the adjacent segment biomechanics play a role in the etiology of …