| 摘要 |
<p>This invention is a low profile removable set screw (1) for use in connecting one medical implant to another, and for similar uses. The set screw has a base (11), and a head (10) that is breakable from the base in a breakaway region (12) at a preselected torque, such that the head allows rotation of the screws and torquing of a tip of the base against one of the implants during installation. The screw includes a groove (32) or a notch at the breakaway region to trigger breaking. The screw also includes a pair of slots (35, 36) extending radially from an outer threaded surface (24) of the base part way into the base. The slots intersect with the breakaway region, but not with each other leaving a center core in the base. A tool (4) is provided for removing the base after the head is broken away. The tool includes a pair of spaced ears (54, 55) that are received in the slots, and provide for rotation of the base by rotating the tool. A bore of larger width than the slots is centered on each slot at the breakaway region providing relief for metal adjacent to the bores during torquing, and breaking.</p> |
