Pedicle screw bi-cortical fixation in treating lumbar spondylolisthesis or destabilization in aged people / 中国组织工程研究

ABSTRACT

OBJECTIVE: To investigate feasibility and effectiveness of pedicle screw bi-cortical fixation in lumbar spondylolisthesis or destabilization of aged people. METHODS: The statistical significance of the distance between the anterior edge of vertebral body and the anterior major blood vessels at the level of pediculus arcus vertebrae by CT scan at random were measured and analyzed. 82 cases of lumbar spondylolisthesis or destabilization, aged 65 years (range 51 to 75 years), including 35 males and 47 females, were treated pedicle screw bi-cortical fixation, with the anterior edge of the vertebral body penetrated by one screw thread. The function was evaluated by Macnab backleg pain scale standards. RESULTS: There was significant difference in the distance of the anterior edge and the major vessels between the old and the young (P< 0.05). All the 82 cases were operated successfully, and the mean time was 145 minutes and the mean amount of bleeding was 530 mL. The 43 cases including 15 males and 28 females were followed up for 18 months (range 3 to 53 months). There was one case of rupture of the spinal dura mater with no sequela after the suture. There were 3 cases of transient paralysis and pain of lower limbs, which were alleviated after 2 months' treatment. No complications of nerve root or vessel injuries were found. All incisions healed well at the primary stage. The lumbocrural pain of all 43 cases was alleviated to a certain content. There were 31 cases of excellent, 10 of good, and 2 of fair; the excellent and good rate was 97%. CONCLUSION: It is feasible and safe to treat the lumbar spondylolisthesis or destabilization in the old with the pedicle screw bi-cortical fixation.