| 摘要 |
A bone anchor system (10) anchors a support member (12) to a bone (14). The bone anchor system comprises a body (16) having a shank (22) adapted for insertion into a hole (44, 48) in the bone. A head (20) is formed on the shank. The head has a support engagement portion (26) adapted to secure the support member to the body. A passage (24). extends from an entry point (32) to an exit point (34) formed in the body. An expandable member (18) has a flexible wall (36) at least partially enclosing an anchoring chamber (38). The expandable member has an expanded state configured to conform to a cavity in the bone. The anchoring member is in fluid communication with the exit point. The expandable member is adapted to expand when a filler material (52) is provided into the anchoring chamber. A portion of the expandable member conforms to the cavity and the body and the support member are.substantially anchored to the bone. |
