A spinal implant (40) including first spinal attachment member (44) for attachingto a first spinal portion (41), second spinal attachment member (46) for attachingto a second spinal portion (42), and a post-implantation variable dimensiondevice disposed between the first and second spinal attachment members, whichis operable after completing surgery in which said spinal implant was installedinto a patient, to cause relative movement between the first and second spinalattachment members.
