Hollow pedicle screw fixation with minimal access-posterior lumbar interbody fusion for lumbar disc herniation / 中国组织工程研究

ABSTRACT

BACKGROUND:The percutaneous pedicle screw technique effectively reduces the excessive injury of screw placement on paraspinal muscles, and promotes the recovery of the function of low back muscle after surgery. Minimal y invasive technique avoids some disadvantages such as large surgical trauma and more bleeding. Folding U-shaped hol ow pedicle screw has hol ow design and good distraction effect. After fixation, stress intensity, compression time, bending stiffness and torsional mechanical properties have been verified in the clinic. OBJECTIVE:To observe the clinical effect of folding U-shaped hol ow pedicle screw fixation combined with minimal access-posterior lumbar interbody fusion for single-level lumbar disc herniation. METHODS:Between January and December 2012, folding U-shaped hol ow pedicle screw fixation with minimal access-posterior lumbar interbody fusion was performed in 30 patients with lumbar disc herniation. The mean fol ow-up period was 12 months. Lumbago Visual Analog Scale, Oswestry Disability Index and imaging indicators were utilized to evaluate clinical therapeutic effects. RESULTS AND CONCLUSION:Preoperative Visual Analog Scale pain score and Oswestry Disability Index for al patients were 7.3±0.7 and 71.4±7.1, 2.9±0.7 and 29.8±3.6 at 3 days after surgery, showing significant differences. At 12 months, no significant difference in Visual Analog Scale pain score and Oswestry Disability Index was detected. Postoperative short-period fol ow-up demonstrated that al lumbar interbody fusion was achieved in one year. There was no complication such as implant failure or infection. These findings indicated that folding U-shaped hol ow pedicle screw fixation with minimal access-posterior lumbar interbody fusion for lumbar disc herniation showed good clinical therapeutic effects, high rate of interbody fusion and a low rate of complications and smal trauma.