Clinical Spine Surgery

Skip Navigation LinksHome > February 2000 - Volume 13 - Issue 1 > The Biomechanical Significance of Anterior Column Support in...
Journal of Spinal Disorders:
Original Articles And Case Reports

The Biomechanical Significance of Anterior Column Support in a Simulated Single-Level Spinal Fusion

Polly, David W Jr; Klemme, William R; Cunningham, Bryan W*; Burnette, Jeffrey B; Haggerty, Charles J*; Oda, Itaru*

Collapse Box


This study examines the biomechanical effects of interbody cages and variations in posterior rod diameter in a simulated single-level spinal fusion. A single-level spinal fusion model composed of polyethylene cylinders, posterior pedicular instrumentation, and variously positioned single or dual interbody cages was used for biomechanical testing. Constructs were tested under compressive flexural load, with measurement of stiffness, rod strain, cage strain, and intracage pressure. A strong linear correlation emerged between the mean construct stiffness and cage positioning within the sagittal plane that was inversely related to posterior rod strain. Two small titanium mesh cages were equivalent to one large cage. In a single-level spine model, the presence of and sagittal position of interbody cages significantly influences overall construct stiffness. Cage strain increased with more anterior positions and was inversely related to rod strain.

© 2000 Lippincott Williams & Wilkins, Inc.

Follow Us!



Article Tools


Article Level Metrics

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.