Different interbody cages are currently used for surgical reconstruction of the anterior and middle columns of the spine following anterior cervical corpectomy. However, subsidence and delayed union/nonunion associated with allograft and cage reconstruction are common complications, which may require revision with instrumentation.
Cages come in different shapes and sizes; some are cylinder-shaped and others box-shaped. Cages are placed (fit) into the spine between vertebrae. Usually, cages are made from bone, metal, plastic, or carbon fiber. Bone chips (autograft, allograft, other bone graft substitutes, or other bone growth stimulating substances (e.g., demineralized bone matrix) may be packed into the cage. During the months after surgery, the hope is the cage will allow (enhance) fusion between the vertebrae below and above. Fusion increases spinal stability.
see Cervical cage
In September of 1996, the FDA approved anterior interbody cages for use in the disc space, providing a new technique that allows the spine to be fused with less morbidity (e.g. less post-operative discomfort) than in the past.
The influence of interbody cage positioning on clinical outcomes following lumbar interbody fusion is not well understood, though it has been hypothesized to play a significant role in stability of the treated level.
Stabilis Stand Alone Cage
Bagby and Kuslich (BAK) device.