Abstract

Low lumbar scoliosis shows alternative collapsed discs and sciatica secondary to foraminal stenosis or alternative bulging. This stenosis causes leg irradiated pain in one or in both sides. Endoscopic surgery done by transforaminal approach helps against foraminal stenosis doing a laser and reamer foraminoplasty. Unfortunately this is not enough for the associated low back pain, probably due to the collapse of the posterior articular process. Unilateral expansion of the collapsed disc, by means a B-Twin expandable implant, can help to heal the chronic low back pain and sciatica in a simple way. Through the posterolateral approach, the implant can be pushed and expanded under endoscopic control. No other incisions are necessary and it doesn't require general anesthesia, as a light sedation is sufficient. The author shows some cases as an example of this complex technique.