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| YE Wei,LI Chunhai,DING Yue.Minimal invasive B-Twin interbody fusion for lumbar degenerative instability[J].Chinese Journal of Spine and Spinal Cord,2010,20(1):6-10. |
| Minimal invasive B-Twin interbody fusion for lumbar degenerative instability |
| Received:September 14, 2009 Revised:December 02, 2009 |
| English Keywords:Lumbar degenerative instability B-Twin cages Posterior approach Minimal incision |
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| English Abstract: |
| 【Abstract】 Objective：To explore the effect of minimal invasive B-Twin interbody fusion for lumbar degenerative instability.Method：From Jan 2006 to Dec 2008，20 cases suffering from lumbar degenerative instability（11 males and 9 females） underwent posterior discectomy，decompression and B-Twin interbody fusion under minimal invasive procedure.The sample had average age of 44 years old（range，33 to 65 years）.Preoperative lumbar dynamic X-ray showed instability in all cases, of these，12 in L4/5 and 8 in L5/S1.MRI showed central disc prolapse in 9 cases and lateral disc prolapse in 11，Lumbar spinal stenosis was noted in 15 cases，of those，11 cases had lateral recess stenosis and 4 had central canal stenosis.Result：The operation time ranged from 1.3h to 2.3h（average，1.8h）.The blood loss ranged from 70ml to 90ml（average，80.7ml）.No injury to dural matter and cerebrospinal fluid leakage was noted，neurological injury and incision hematoma were not noticed either.1 case was lost follow-up and 19 cases were followed up for an average of 1.3 years（range，6 months to 2.5 years）.The ODI score for preoperative，3 days，3 months and final follow-up was 38.74±4.70，12.26±2.18，9.95±2.39，8.05±2.07 respectively（postoperative compare to preoperative，P<0.01；3 months compare to 3 days postoperative，P<0.05；3 months compared to final follow-up，P＞0.05）.The disc height in preoperative，3 days postoperative and final follow-up were 9.73±1.49mm，13.53±1.63mm and 12.32±1.42mm respectively（postoperative compare to preoperative，P<0.01；3 days postoperative compare to final follow-up，P<0.05）.More than 2mm subsidence of B-Twin was presented in 5 cases and less than 2mm subsidence in 10 cases.Bony nonunion occurred in 1 case and 18 cases had solid bony union.2 cases had some extent of leg pain after operation and among them，1 had pain relieved after conservative treatment and 1 still had pain unresolved due to prolapsed bone graft.Conclusion：Minimal invasive B-Twin interbody fusion for lumbar degenerative instability is reliable and less invasive, which can ensure a good short term outcome. |
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