16
DePuy Synthes
LISS DF
Technique Guide
1
Insert LISS
Instruments
Assembled Insertion Guide
324.027 Trocar, length 162 mm, for No. 324.022
Use the assembled insertion guide to insert the plate be-
tween the lateral vastus muscle and the periost. Slide the
plate proximally and ensure that its proximal end remains in
constant contact with the bone. Position the distal end of
the plate against the lateral condyle. To find the correct posi-
tion, move the plate proximally and then back distally until
the plate fits the condyle. Should the proximal end of the
handle and the soft tissues impair the insertion of the plate,
it is possible to remove the radiolucent proximal part of the
handle for insertion.
Plate Insertion
Due to its weight, the insertion guide tends to tilt dorsally. If
the insertion guide points parallel to the floor with the pa-
tient in a supine position, the plate is externally rotated and
no longer lies flat up against the lateral condyle. The fixation
bolt must be oriented parallel to the patello-femoral joint.
Consequently, the insertion guide shows an internal rotation
of about 10°. This occurrence is also visible in the AP view of
an image intensifier. The plate must lie flat up against the
condyle to ensure an optimal fit on the bone.
