Bone Screws, Instrumentation, and Methods of Using of Same

A stylet control system for selectively advancing and retracting a stylet comprising:

• a stylet having a proximal end and a distal end;
• a screwdriver defining a bore for receiving the stylet and having a screw-engaging end for engaging a screw;
• a cap being operatively connected to the screwdriver;
• and
• a retraction feeder receivable within a lumen of the cap and having an engagement member for engaging the proximal end of the stylet;
• wherein when the screwdriver is rotated in a first rotation direction, the screwdriver advances the screw in the first axial direction and the proximal end of the stylet engages the engagement member of the retraction feeder to retract the stylet in a second axial direction, opposite the first axial direction.

A stylet control system for selectively advancing and retracting a stylet comprising:

• a stylet having a first end and a second end, the second end being threaded;
• a screwdriver defining a bore for receiving the stylet and having a screw-engaging end for engaging a screw, the stylet being rotationally fixed relative to the screwdriver;
• and
• a stylet feeder having a threaded pawl for one-way engagement with the threads of the second end of the stylet;
• wherein when the screwdriver is rotated in a first rotation direction, the screwdriver advances the screw in the first axial direction.

A stylet control system for selectively advancing and retracting a stylet comprising:

• a stylet having a first end and a second end, the second end being threaded;
• a screwdriver defining a bore for receiving the stylet and having a screw-engaging end for engaging a screw, the stylet being rotationally fixed relative to the screwdriver;
• a cap being operatively connected to the screwdriver;
• and
• a retraction feeder receivable within a lumen of the cap and having a threaded pawl for one-way engagement with the threads of the second end of the stylet;
• wherein when the screwdriver is rotated in a first rotation direction, the screwdriver advances the screw in the first axial direction and the threads of the stylet engages the threaded pawl of the retraction feeder to retract the stylet in a second axial direction, opposite the first axial direction.