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Calcaneal L-M Screw Placement
Instruments Used:
1. 8 mm Guide Sleeve (9)
2. Trocar Obturator (6)
3. 4 mm Drill Guide (8)
4. 4 mm Drill (23)
5. Screw Depth Gauge (Optional) (21)
6. 3.5 mm Hex Driver Shaft (26)
7. Blue-Handle Ratchet Driver (31)
8. Cortical Screw
Thread the Trocar into the 8 mm Guide Sleeve. Insert the 8 mm Guide Sleeve and Trocar assembly into
the lateral side of the Targeting Frame. Make an incision at the Trocar tip and abut the Trocar against the
calcaneus. Distal retraction of the peroneal tendons can sometimes be done to allow direct contact of the
Trocar against bone. Leaving the Guide Sleeve in place, replace the Trocar with the 4 mm Drill Guide (indicated
with a green stripe) (A). Ensuring the Drill Guide is NOT resting against the bone, drill bicortical with the 4 mm
Drill and measure the screw length off the Drill Guide in the same manner as previously described in Step 11.
Alternatively, the Screw Depth Gauge can be used to determine screw length. Note that the Screw Depth
Gauge must also be read off of the Drill Guide as it abuts the bone.
TECH TIP
• Due to the soft bone in the medial calcaneus, it might be difficult to determine whether the drill has breached
the far lateral cortex through tactile feedback. Assess drill position using fluoroscopy.
A
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