Fig. 1From: The efficacy of oral vitamin D supplements on fusion outcome in patients receiving elective lumbar spinal fusion—a randomized control trialA 75-year-old female received lumbar spinal fusion surgery (L4/5). Lateral flexion (A) and extension (B) views of lumber spine radiography at postoperative 6-month showed bridging callus formation (labeled by *) and range of motion in L4/5 of less than five degrees (from 10.5 degrees to 11.6 degrees). Computed tomography (C) at postoperative 6-month showed callus formation (*) between the fused vertebraeBack to article page