Fig. 2From: A case report of revision occipital-cervical fusion after atlanto-axial instrumentation failure for neurofibromatosis type IFirst operation. a Anterior–posterior radiography image at the first operation. b Sagittal radiography imaging at the first operation. The taping system and the iliac bone were used for fixation between C1 and C2. The upper atlantodental interval was 3.5 mmBack to article page