Synthes USS II, Manual

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7–10°
10–20°
10–15° 10–15°
5–10° 5–10°
7–10°
1 2
3
4 5a
5b
8 Synthes USS II Handling technique
1
Determine entry point and position of pedicle screw
a. Thoracic spine
The entry points are located directly at the lower margin of
the superior facet joint (1). Insert the screw at an angle
of 7–10° to the midline (2) and 10 –20° caudally (3).
b. Lumbar spine
The entry points are located at the intersection of the vertical
line (this runs at a tangent to the lateral edge of the superior
articular process) and the horizontal line that intersects the
transverse process (4).
Insert the screw at the thoracolumbar junction at an angle of
5 –10° to the midline (5a). Insert the screw at the L2 – L5 level
at an angle of 10 –15° (5b).
Insert Pedicle Screw