[Surgical treatment of lumbosacral spondylolisthesis with gross displacement].

The authors studied the results of surgery for lombosacral spondylolisthesis with gross displacement. The technique of arthrodesis makes intersomatic fusion easy in displacement of grades II and III. This fusion, without reduction of the displacement, leads to good functional rsults climating low back pain, and most sciatic pain without which time would be necessary for posterior liberation at the olisthetic stage. The authors also believe that preliminary correction of displacement, although satisfying in orthopaedic terms but still difficult to achieve with current techniques, is at present rarely indicated.