A flexible chain implant (1000') for insertion into an interior volume of a vertebral body. The implant may be implanted in an insertion position for sliding through a cannula and is flexible for packing into the interior volume in an implanted configuration. The implant randomly separates in the implanted configuration. The implant includes a plurality of substantially non-flexible bodies (1010) and a plurality of substantially flexible links (1020) interconnecting the bodies. The non-flexible bodies include a plurality of facets (1030) and/or abutment surfaces (1118).
