Implantable devices useful for creating bony fusion particularly in intervertebral
spinal fusion. The device is formed of bone and has an at least partially demineralized
portion between two rigid bone portions creating an area of flexibility. In one
application, the area of flexibility may be used to move the device between a reduced
size insertion configuration and an expanded implanted configuration. In another
use, the area of flexibility may be useful to dampen shock applied to the implant.
A method is also disclosed for making the implants and inserting the implants into
an intervertebral disc space to promote interbody fusion.
