| 摘要 |
A device, system and method for securing a plate to a bone. An anchor device has a screw ( 34,104 ) (with a head portion (64,116) ) and a locking disc (80). The head portion includes a slotted wall defining a plurality of petals (76,118) disposed around a central opening (78). The screw further includes an internal bore (120). The locking disc (80) is rotatably disposed within the central opening (78), such that in a first rotational position the petals (76,118) may flex inwardly, and in a second rotational position the petals (76,118) are substantially prevented from flexing inwardly. A tool (130) for manipulating the anchor device (34, 104) has a shaft (134) with its end (138) configured to mate with the internal bore (120) of the screw to permit selective rotation of the screw, and a sleeve member (140) rotatably and slideably mounted on the shaft having an end (114) that mates with the locking disc (80) to permit selective rotation of the disc. |
