LUMBAR AND LUMBOSACRAL FUSIONS USING COTREL-DUBOUSSET PEDICLE SCREWS AND RODS

The first 50 consecutive patients stabilized with Cotrel-Dubousset rod s for lumbar or lumbosacral fusions were followed for an average of 2 years. The occurrence of fusion, maintenance of alignment, and rate of hardware complications were examined. There were 28 men and 22 women, ages 18-87 years, and 133 vertebral levels. Twenty-nine sets of 5-mm, and 21 pairs of 7-mm, rods were placed. Two hundred and sixty-eight p edicle screws were used. Forty-eight out of 50 (96%) patients demonstr ated successful arthrodesis after their initial procedure. One pedicle screw became separated from the rod. No rods migrated or broke. Seven (2.6%) pedicle screws bent and 3 (1%) broke. Large and small diameter Cotrel-Dubousset rods allowed short segment lumbar and lumbosacral fu sion with a high degree of reliability.