Anterior and posterior stabilization of the spine following vertebral body resection. A postmortem investigation.
Postmortem examination of a spine, which had been instrumented anteriorly at one level and posteriorly at another following vertebral body resections, showed that the posterior instrumentation was more effective in resisting torsion. Postmortem examination of a second case, where the anterior fixation had been strengthened by the addition of cement studs in the vertebral end-plates and a paravertebral modified and strengthened Zielke screw/rod system, showed this second anterior system to be an improvement for resisting torsion following the resection of one vertebral body. Anterior interbody devices become enveloped in a firm smooth fibrous capsule. A preliminary experiment on a cadaver spine had shown that anterior interbody fixation was better than posterior instrumentation for resisting flexion-compression forces.
D000368:Aged; D001696:Biomechanical Phenomena; D002102:Cadaver; D005260:Female; D005598:Fractures, Spontaneous / Q000601:surgery; D006801:Humans; D009984:Orthopedic Fixation Devices; D013117:Spinal Cord Compression / Q000601:surgery; D013124:Spinal Injuries / Q000601:surgery; D013131:Spine / Q000503:physiopathology / Q000601:surgery*; D014102:Torsion Abnormality