Posterior Oblique Lumbar Arthrodesis (POLAr™)
The POLAr™ Instrument Set by Zimmer Spine allows a surgeon to
place anterior column support at an oblique angle from a posterior approach.
This procedure offers many advantages including minimal exposure, precise
implantation, and the biomechanics of a construct consisting of anterior
column support combined with pedicle screws.
The procedure is
performed via unilateral exposure, therefore minimizing the exposure
requirements over the traditional bi-lateral procedure. In addition, the
instrumentation provides the surgeon the ability to restore disc height
while allowing for an implementation of a singular cylindrical implant.
The drill tubes supplied with this set have an angulation of 22.5º. This
facilitates the surgeon's placement of the implants at the desired oblique
angle. A central wedge distractor is also supplied to assist in the
placement of the drill tube. The POLAr drill tubes have paddles
utilizing a "Rule of One" distraction.
For instance, an
11mm implant can be placed with 10mm distraction maximizing the disc height
while minimizing the size of the implant. The Silhouette™
Spinal Fixation System is used to complete a three column tension band,
resulting in a precisely placed, 360º construct from a posterior approach
with room for autologous bone graft.
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