Patent ID: 8303602

Claim:
A system for assembling a bone anchoring device, comprising: a bone anchoring device comprising: a shank having a shaft section to be anchored in a bone and an engagement end, the shank having a longitudinal axis; a head being separate from the shank and having a through bore; and a receiving part having a first end, a second end defining a longitudinal axis, and a longitudinal bore extending from the first to the second end, the head being positionable within the bore of the receiving part at the second end; and an instrument comprising: a holding portion and a pin, the holding portion configured to hold the pin; the pin comprising: a rod section having a length and a diameter configured to it and extend at least through the bore of the head when the pin is inserted therein; and a free end portion extending from the rod section such as to project from the bore of the head, and configured to engage with the engagement end of the shank and project past the engagement end of the shank to align the longitudinal axis of the receiving part with the longitudinal axis of the shank.