Transforaminal Lumbar Interbody Fusion

TLIF reconstruction with a solitary cage did not increase overall spine flexibility from the intact condition but significantly increased segmental flexibility at L4-L5 in axial rotation. A unilateral translaminar facet screw had minimal stabilizing effect at L4-L5. Unilateral pedicle screws frews further increased stiffness at the L4-L5 segment. However, TLIF with bilateral pedicle screws most closely approximated the L4-L5 segmental flexibility of the intact spine.