Lumbar spinal instability caused by Spondylolisthesis is a very common disease entity seen in day to day orthopaedic practice. Spondylolisthesis defined as anterior or posterior slipping of one segment of the spine on the next lower segment. Spondylolisthesis usually involves a bony defect in the pars interarticularis.

Currently a variety of techniques are available for lumbar fusion². The operative options for Spondylolisthesis varied and include the following:

1.   Posterior in situ fusion

2.   Adding instrumentation to a posterior in situ fusion

3.   Posterior decompression, partial reduction, instrumentation and fusion

4.   Posterior decompression, complete reduction, instrumentation and posterior fusion

5.   Posterior fusion with postoperative cast reduction

6.   Anterior release

7.   Intradiscal graft or structural cage combined with posterior instrumentation and fusion

8.   Reduction and circumferential fusion with or without instrumentation.

9.   Posterior instrumentation and fusion combined with posterior/transforaminal lumbar interbody fusion.