主权项 |
1. An insertion instrument, comprising:
an inner shaft having an elongate body with proximal and distal ends, the distal end of the inner shaft having a tip configured to engage a pedicle screw; and a knob assembly, including:
a tubular body having proximal and distal ends defining a first longitudinal bore, the first longitudinal bore adapted to rotatably and translatably support the inner shaft, wherein the distal end of the tubular body is configured to engage a tulip of the pedicle screw; anda knob having proximal and distal ends, the knob defining a second longitudinal bore, the second longitudinal bore configured to be slidably and non-rotatably supported by the proximal end of the tubular body, wherein the knob is selectively engageable with the inner shaft. |