Fig. 4.

Follow-up to date of patients undergoing standalone lordotic endoscopic wedge lumbar interbody fusion. The green-shaded area highlights the time period when postoperative dorsal root ganglion (DRG) irritations were treated with transforaminal epidural steroid injections. The orange-shaded area signifies the postoperative interval in which additional- and revision surgeries were performed. The expected normal distribution of follow-up data is indicated by the black line. Most postoperative interventions occurred early on within the first 5 months following surgery. SD, standard deviation.