Unilateral Pedicle Screw Fixation and Interbody Fusion for the Treatment of Lumbar Disc Hernia-tion with Lumbar Spinal Instability under Mast Quadrant System
Abstract：Objective To explore the clinical outcome of the minimally invasive surgical approach by mast Quadrant sys-tem in the treatment of lumbar disc herniation with lumbar spinal instability. Methods For 31 patients with single level lum-bar disc herniation with lumbar spinal instability which diagnosed by magnetic resonance imaging and dynamic X-rays. This group included 20 males and 11 females. All patients were managed by unilateral pedicle screw fixation and interbody fusion under Mast Quadrant system. We evaluate the therapeutic effect according to Japanese Orthopaedic Association(JOA)and Os-westry disability index(ODI)before and after surgery. X-rays was used to evaluate the height variation and fusion of interverte-bral space. Results All patients were followed up for 14 to 36 months,with a mean period of 20. 4 months. The symptoms of lumbar and lower extremity were relieved completely. There was no decrease of intervertebral height. Radiographic interbody fu-sion rate was 100% . According to JOA scoring,the score increased from(7. 6 ± 2. 5)before operation to(25. 7 ± 1. 4)in the last follow-up,improvement rate of treatment was 84. 46% ,the score of ODI decreased from(55. 5 ± 5. 2)to(10. 9 ± 3. 0)in the last follow up after surgery. Conclusion The minimally invasive surgical treatment of unilateral pedicle screw fixation and interbody fusion assisted mast Quadrant system for lumbar disc herniation with lumbar spinal instability is reliable and provides satisfactory lumbar fusion and clinical results.
Keywords：minimally invasiveunilateral pedicle screw fixationspinal fusionlumbar disc herniationlumbar instability
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 680-683 )