Locking mechanism
disengaged
Locking mechanism
engaged
Nail
Lock drive
Lock prong
Head element
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 head element, controlling the rotation of the head
element. The lock drive advances and retracts the lock prong.
Steps for assembly
1 Slide the lip 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 asymmetrical
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 the head element through the hole in the nail
with the flat facing the distal end of the nail and use the
5.0 mm flexible hexagonal screwdriver to advance
the locking mechanism until it touches the head element.
5 Back the locking mechanism off the head element by
turning the screwdriver in a counterclockwise direction
one full turn, and remove the head element.
The nail is now ready for insertion.
TFN – Titanium Trochanteric Fixation Nail System
Technique Guide
Synthes
55