OBJECTIVE: To present the philosophy used, and demonstrate how and why we decided to protect the level adjacent to a bone union. METHODS: In the selection criteria of 620 patients who had undergone surgery between January 2007 and August 2011 due to degenerative pathology, instability and stenosis of the lumbosacral canal, 30 patients were selected with Pfirmann grades 3 and 4, from which six were lost to follow-up and four refused surgery, leaving 20 patients who underwent surgery. The mean age of the patients was 46 years (range: 22 to 71), with 11 men (55%) and 9 women (45%). RESULTS: The follow-up of the cases was 6 months to 2 years, and so far, no clinical or radiological worsening has been observed, or loosening of the instrumentation in any case. CONCLUSIONS: we understand that protection of the adjacent level through the use of semi-rigid rods in PEEK is a good alternative, as it is not necessary to approach the ligament or pedicles of the level adjacent to the union.
Hybrid cells; Vertebral spine; Intervertebral disk degeneration
