Related Experiment Video
Updated: Aug 19, 2026
Three-dimensional Navigation-guided, Prone, Single-position, Lateral Lumbar Interbody Fusion Technique
Published on: July 15, 2021
Lumbar spinal mobility after short anterior interbody fusion
Study Design:
Segmental deformations of the lumbar spine in asymptomatic volunteers measured radiologically were compared with those in patients who underwent anterior interbody fusion.
Objective:
To determine the effects of anterior lumbar interbody fusion on the juxta-fused segments.
Summary Of Background Data:
Stiffness of a spinal segment after fusion was thought to be the cause of the degeneration process at the juxta-fused segments.
Methods:
Segmental deformations of the lumbar spine, from maximum extension to maximum flexion, in 30 asymptomatic volunteers and 52 pain-free patients who had single-level L4-L5 or double-level L4-S1 fusion were measured and compared.
Results:
The total flexibility of the lumbar spine was decreased after a single-level fusion and further decreased after double-level fusions. The segmental deformations of the juxta-fused segments also were decreased after either a single- or double-level fusion.
Conclusions:
During normal flexion and extension of the lumbar spine, the juxta-fused segments were not deformed beyond their physiological limits after fusion. Thus, accelerated degeneration observed at a juxta-fused segment is unlikely to be attributable to hypermobility.
