There is disclosed systems and methods for spinal nucleus replacement by
constructing channels through vertebral segments on either side of an
area into which the spinal nucleus is to be positioned, the channels
running from a channel end outside of the area to a channel end abutting
the area. One end of a suture is inserted into the outside channel end of
a first one of the channels and passed through the first channel and into
the area and out of the area through the second channel until it emerges
from the second channel. The suture is then used to pull the nucleus into
the area.