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Insertion of an interspinous devices has became a common procedure for the treatment of different clinical picture of degenerative spinal disease. We present our experience in 1,575 patients with the use of two different interspinous spacers: Device for Intervertebral Assisted Motion (DIAM) and Aperius PercLID system. From 2000 through 2008, 1,315 consecutive patients underwent DIAM implantation and 260 had an Aperius PercLID procedure. The main surgical indications included: degenerative disc disease (478 patients), canal and/or foraminal stenosis (347 patients), disc herniation (283 patients), black disc and facet syndrome (143) and topping-off (64 patients). 1,100 patients underwent a single level implant and 475 had a multiple level implant. Mean operating time was 35 min for DIAM and 7 min for Aperius. Complications were detected in 20 patients (10 cases of infections, 10 fractures of the posterior spinous processes). 40 patients were subsequently treated with posterior arthrodesis (n = 30) or total disc replacement (n = 10). Patient's postoperative clinical status was rated according to the modified Macnab criteria: symptoms resolution or improvement was achieved in 1,505 patients; and unchanged or unsatisfactory results in 70. Both techniques are safe, simple and less technically demanding. These approaches appear to be an effective alternative in selected cases, although conventional posterior lumbar decompression and fusion still may be required.

Interspinous spacers in the treatment of degenerative lumbar spinal disease: our experience with DIAM and Aperius devices