Locking Mechanism Assembly
There is no need to remove the preassembled locking mech-
anism from the nail. If the locking mechanism is removed, it
can be reassembled by following the steps below. The lock-
ing mechanism consists of two parts: the lock drive and the
lock prong. The lock prong fills the void made by the flat on
the screw, controlling the rotation of the screw. The lock
drive advances and retracts the lock prong.
Steps for assembly
1
Slide the flange of the lock drive into the mating groove
on the lock prong, forming one assembly.
2
Align the two lobes on the lock prong with the channels
in the proximal end of the nail. The lobes are asymmetri-
cal and will only fit into the nail in one orientation.
3
Drop the lock drive and lock prong, as one piece, into the
top of the nail.
4
Place an 11.0 mm screw through the 11.0 mm hole in
the nail with the flat facing the distal end of the nail and
use the 5.0 mm flexible hexagonal screwdriver to ad-
vance the locking mechanism until it touches the screw.
5
Back the locking mechanism off the 11.0 mm screw by
turning the screwdriver counterclockwise one full turn,
and remove the 11.0 mm screw.
The nail is now ready for insertion.
Locking Mechanism Assembly
46
Synthes
Titanium Trochanteric Fixation Nail System—Screw Option Technique Guide
Locking mechanism
disengaged
Locking mechanism
engaged
Screw
Lock drive
Lock prong
Nail
