A vertebral disc annular fibrosis tensioning and lengthening device that
restores the loss of disc height as a result of disc degeneration and
other factors. The vertebral disc annular fibrosis tensioning and
lengthening device includes pedicle screws having heads with cup-shaped
cavities. The pedicle screws are threaded into the vertebral bodies of
adjacent vertebrae through the pedicles so that open parts of the heads
of the pedicle screws face each other. A spring is inserted into the
cup-shaped cavities in compression so that the spring bias forces the
pedicle screws apart, thus increasing the height of the disc space.