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Radiographic and Scintigraphic Courses of Union in Cervical Interbody Fusion: Hydroxyapatite Grafts Versus Iliac Bone Autografts

Department of Neurosurgery, Miyazaki Medical College, Miyazaki; and Departments of Neuroradiology and Neurosurgery, Junwakai Memorial Hospital, Miyazaki, Japan

View larger version (105K): [in this window] [in a new window]   FIGURE 1. Plain radiographs of 66-y-old woman after C4–C5 fusion using HA graft. (A) Postoperative lateral radiograph at 3 mo shows apparent radiolucent stripe (arrows) around graft and bone growth adjacent to vertebral bodies (arrowheads). (B) Postoperative lateral radiograph at 10 mo shows bridging bone (arrowhead) at dorsal aspect of graft and disappearance of radiolucent stripe.

View larger version (103K): [in this window] [in a new window]   FIGURE 2. Plain radiograph of 60-y-old man after C5–C6 fusion using autograft. Postoperative lateral radiograph at 5 mo shows complete bridging of trabeculae between graft and adjacent vertebral bodies.

View larger version (12K): [in this window] [in a new window]   FIGURE 3. Serial changes in 99mTc-HMDP uptake ratio for HA grafts () and iliac bone autografts ().