| 摘要 |
<p>A closure for use in conjunction with an open receiver of a medical implant for capturing and locking a rod member in the implant includes a radially outward threaded cylindrical body sized and shaped to be threadably received between two arms of a head of the implant. The closure also includes a driving head and a coaxial removal head. The driving head includes an internal driving feature and may include an external-driving feature. The driving head breaks away from the body at a predetermined torque leaving the removal head. In one embodiment, a rim stop is located near a base of the driving head to prevent a tool with a socket for gripping the driving head from inadvertently gripping the removal head during installation and over-torquing the closure. The stop is removed with the driving head, leaving the removal head that may be received by the same socket tool used for installation.</p> |
