The 7.3 screw was assembled onto the 7.3 green driver.The assembled screw was inserted into the reamed canal over 2.4 guidewire.After it was fully inserted, the surgeon disengaged the driver from the screw and took x-rays to confirm the position.Not satisfied with the position, the surgeon proceeded to re-engage the driver to the screw to back it up.After trying a few times, the driver threads would not re-engage the screw.Nonetheless, he was still able to use the driver to retract the screw to the desired position.After the driver was handed back to the scrub nurse, she began to disassemble it, and at this point, it was observed that the thread on the end of the internal shaft had broken off.The broken piece could not be found in the sterile field.Also, the broken fragment did not show on x-rays.
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