Transpedicular Slot instrumentation for the lumbar disorders.

We have experienced four cases of transpedicular Slot instrumentation for the stabilization of the lumbar spine. Posterior decompression and stabilization are necessary to the stenotic lumbar disorders with instability. This surgery has been performed on two cases of lumbar spinal canal stenosis with degenerative spondylolisthesis, one case of disc herniation with degenerative spondylolisthesis, and one case of pedicular kinking associated with asymmetrical disc collapse.