Technique of anatomical reduction of lumbar spondylolisthesis and its surgical stabilization.

This is a report of a method for treatment of spondylolisthesis based upon: (1) preoperative reduction of the olisthesis by plaster casts; (2) fixation of the reduction by posterior arthrodesis, accompanied by a system of instrumentation which has been developed by the authors. The treatment of severe spondyloptosis in six children and of spondylolisthesis in 14 adults is considered separately, because of the somewhat different problems in the two different age groups.