| 摘要 |
The present invention is directed to a device for connecting a longitudinal carrier, for example, a longitudinal spinal rod, to a bone fixation means, for exampl e, a pedicle screw. The device includes a connection element having an upper end, a lower end, a nd a cavity extending from the upper end to the lower end, the cavity having a reduced diameter portion at the lower end thereof thereby forming a shoulder for engaging the head of th e bone fixation means. The connection element further including a transverse channel for receiving the longitudinal carrier. The device further includes a sealing cap incorporatin g tensioning means for securing the longitudinal carrier within the transverse channel. The sealing cap being secured to the connection element by way of arresting means, wherein the arresting means preferably includes a plurality of bulges, i.e., projections, formed on the outer surfa ce of the connection element and the sealing cap includes a plurality of complementary depression s, i.e., recesses. The device may further incorporate securing means in order to prevent the bo ne fixation means from passing through the upper end of the cavity once the bone fixation mean s has been introduced into the connection element.
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