| 摘要 |
A bone fragment wire (10) connects a bone fragment (30) to an anchor bone (32) for healing duration. The bone fragment wire (10) has a distal bone penetration section (22) which is advanced into the bone (20) and a proximal bone exterior section (24). The proximal bone exterior section (24) is longer than the bone penetration section (22), and thus extends substantially out of the bone (20) during healing of the bone (20). The bone penetration section (22) includes a distal bone anchor section (12) which threadingly engages the anchor bone (32), and a proximal fragment section (14) of small diameter. The fragment section (14) fits within the overbore created by advancing the bone anchor section (12) through the bone fragment (30), and thus extends through but does not positively engage the bone fragment (30). A compression engagement (36) on a distal end of the bone exterior section (24) provides a compression shoulder (38). In one embodiment the compression engagement (36) is provided by a threaded compression nut (40), while in another embodiment the compression engagement (36) is permanently affixed to the bone wire (10). The shoulder (38) makes substantial contact with an exterior surface of the bone fragment (30), biasing the bone fragment (30) towards the anchor bone (32) with a controlled compression force. The compression engagement (36) is further adapted, such as through thread from and/or with a sloped proximal side, to enable the bone wire (10) to be more easily removed from the healed fracture without damaging surrounding tissue. |
