Objects: An oscillating bone saw has been used rarely to perform laminectomy. The purpose of this study is to describe a relatively quick and harmless technique for multilevel laminectomy in patients with lumbar spinal stenosis (LSS) by means of an oscillating bone saw in addition to reporting the matters those entail this technique and surgery-associated features as well.
Methods: In a prospective study, 45 LSS patients who required multilevel laminectomy were included. The bones were cut using an oscillating sagittal saw equipped with a fine 1 cm blade. Posterolateral fusion was performed if any evidence of spinal instability occurred or correction of deformity was addressed. The spent time for laminectomy from initial cutting to whole bone removal (T1) and the duration of laminectomy initiation to the end of decompression (T2) for corresponding level were recorded. Furthermore, the volume of harvested autograft was measured. Any dural injuries were reported.
Results: Posterolateral fusion was performed in 32 patients (71.1%). T1 per level and T2 per level averaged 70.5±5.4s and 157.5±12.1s, respectively. The volume of harvested autograft per level averaged 3.5±1.2 cc. No durotomy was observed during laminectomy using an oscillating bone saw. However, a dural tear occurred in one patient when a Kerisson punch was utilized for ligamentum flavum removal and foraminotomy.
Conclusion: Laminectomy using an oscillating bone saw is a safe procedure that provides a sufficient volume of harvested autograft for fusion. In our experience, this technique can remarkably reduce the time of surgery as well.