Zimmer Biomet Zimmer Natural Nail, Manual

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17 | Zimmer Natural Nail – Cephalomedullary Asia Nail Surgical Technique
Lag Screw Placement (cont.)
Attach the lag screw reamer to the drill. Ream over
the 3.2 mm pin to the level of the subchondral
bone (Figure 23). While drilling, use the C-arm
intermittently to verify position of the reamer and
to make sure that the guide pin is not migrating
through the femoral head. Remove the reamer.
Push the end of the 3.2 mm pin while withdrawing
the power tool. The lag screw is self tapping. If preferred, tap the
hole for the lag screw over the guide pin by hand
using the T-handle. The stop can be used to indicate
the appropriate depth to tap. Select the appropriate
lag screw length based on previous measurements.
The screw depth gauge can also be used to verify
the length of lag screw that should be used.
Attach the lag screw to the lag screw inserter using
the lag screw retaining shaft to fully secure the
screw to the inserter (Figure 24).
Figure 23 Figure 24