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A 49-year-old man had severe neck pain after a vehicle collision, and had been previously treated with HVI. (A) The neck pain persisted for 12 weeks while HVI was applied. The lateral plain radiograph showed anterior displacement above the subaxial spine at C2 and an unhealed bony fracture. The axial CT image also showed the bony fractured particles yet unhealed. (B) A posterior fixation was performed at C1-2-3. An axial CT image shows bony healing at 12 weeks after surgery.
