Spondylolisthesis after multiple bilateral laminectomies and facetectomies for lumbar spondylosis

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Abstract
A further 3 yr follow-up review of 59 patients suffering with intractable pain due to lumbar spondylosis and treated by multiple-level bilateral laminectomies and facetectomies was reported. Routine postoperative X-ray examination revealed that 6 of 59 patients had developed spondylolisthesis. Two of the 6 were symptomatic and required a secondary fusion procedure. Analysis of the patients who had developed vertebral slippage revealed that 6% of the patients with only 2 levels (L-4 and L-5) removed developed spondylolisthesis, but in those with 3 or more levels removed 15% showed slipped vertebrae. After an average follow-up period of 6 yr, 87% of patients still had a worthwhile result as contrasted with 91% of the same series who had had a good result after a follow-up period averaging 3 yr.

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