| http://www.w3.org/ns/prov#value | - Upon at least partially filling the upper and lower inflatable rims and the posterior frame between two adjacent vertebrae, a natural angle between said vertebrae is at least partially restored. [0012] In another embodiment, the present invention is a method of implanting an intervertebral spinal fusion device, comprising the steps of (a) performing a discectomy while preserving an outer annular s
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