The Microendoscopic Decompression of Lumbar Stenosis: A Review of the Current Literature and Clinical Results
Figure 4
(a) Retractable, single-sided guard on the pneumatic drill bit protects the dura from inadvertent injury on one side while allowing visualization of the drill bit tip from the other side. (b) Zoomed-in view of the drill-bit that is a variant of the AM8 standard drill (Midas Rex, Medtronic).
