IMPLANT SYSTEM, METHOD, AND INSTRUMENT FOR AUGMENTATION OR RECONSTRUCTION OF INTERVERTEBRAL DISC

摘要

An augmentation instrument (150) for attaching a retaining device (34) to a vertebral endplate comprises a drive housing (152) having a distal end portion, a drive mechanism (156) extending through the drive housing and including a flexible shaft portion (166), and an attachment mechanism (172) at the distal end portion of the drive housing. The attachment mechanism is adapted for coupling to the retaining device. The retaining device comprises a buthress plate with a mounting surface (42) and a retaining surface (44). The retaining device is fixed to only one vertebral endplate by a fastener (36), is locatable entirely between the vertebral endplates and prevents migration of a nucleus prosthesis (32) disposed between the vertebral endplates.