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An introduction of surgical technique. (A) Mechanical contact between L4 (left arrow) and L5 (right arrow) spinous processes; (B) Excision procedure of partial spinous processes by using a high‐speed drill; (C) Endoscopic hemostasis by plasma radiofrequency. (D) The distance between L4 (left arrow) and L5 (right arrow) increased after interspinous plasty.
