Spinal column fixation device.

摘要

An apparatus for connecting vertebrae (V) including a rod (22) and a fastener (24) for connecting the rod (22) with a vertebra (V) of a spinal column. The fastener (24) includes a screw (42) having a threaded portion (52) for connection with the vertebra (V). The screw (42) has a head (62) connected to one end of the threaded portion (52). The head (62) includes a bight portion (64) and a pair of spaced apart resiliently deflectable legs (66, 68) extending from the bight portion (64). The pair of legs (66, 68) and the bight portion (64) define a cavity in the screw head (62). The rod (22) is receivable in the cavity in the screw head (62). A cap (44) is receivable on the pair of legs (66, 68) and deflects the pair of legs (66, 68) to clamp around the portion of the rod (22) received in the cavity in the screw head (62). The cap (44) is retained on the screw (42) so that movement of the rod (22) relative to the screw (42) is blocked.