Evaluation of Operative Treatment with Cotrel-Dubousset System for the Spondylolisthesis

There were many instruments for the treatment of spondylolisthesis. Recently, the Cotrel-Dubousset system was introduced and it showed satisfactory stability and efficient reduction of displacement. Nine patients were treated with CD system at the department of orthopaedic surgery, college of Medicine, Ewha Womans University between October, 1987 and July, 1988. The results were as follows.

1) In 9 cases, 4 cases were male and 5 cases were female and age distribution was from 31 years old to 52 years old, the average was 41 years of age.

2) The displacement between L4 and L5 was observed in 5 cases and the degenerative type predominant.

3) The symptoms of back pain only was in 1 case, back pain and radiating pain in 4 cases back pain, radiating pain and neurological sign in 3 cases and radiating pain only in 1 case.

4) The amount of displacement measured by Boxall was from 12.7% preoperatively to 3.4% postoperatively and the amount of angle by Meschan was from 8.3 degrees preoperatively to 2.2 degrees postoperatively.

5) The overall results were satisfactory except 1 case.