A Prospective Randomized Study of Unilateral Versus Bilateral Instrumented Posterolateral Lumbar Fusion in Degenerative Spondylolisthesis

Abstract

Unilateral instrumentation used for the treatment of degenerative lumbar spondylolisthesis is as effective as bilateral instrumentation when performed in addition to 1- or 2-level posterolateral fusion. The cost of this method is lower, saves time, and reduces possible risk inserting screws in only one side.