One of the most challenging problems facing spinal surgeons
today is vertebral body replacement. The introduction and widespread acceptance
of interbody techniques in the early 1990s has led to an increased interest
in the role of the anterior column in reconstruction of complex spinal
disorders. Leading orthopedic surgeons and neurosurgeons have worked to
increase the versatility of interbody devices in order to address an increasingly
complex array of spinal problems. The most common indication for vertebral
body replacement is for reconstruction of the anterior column of the spine
after the resection of spinal tumors or severely fractured anterior spinal
elements.
Technology
 VERTE-SPAN® Vertebral Body Replacement represents the
next step in the evolution of devices available for complex anterior reconstruction
of vertebral body defects. Prior spinal instrumentation has focused on
stabilizing the anterior column with plate-and-screw or rod-and-screw
constructs. The space between the vertebral bodies is often filled with
a variety of structural and non-structural bone grafts.
The size and shape of the vertebral body defects that
result from trauma or the surgical excision of part of the anterior column
are all unique, however, and the reconstruction of these defects can be
challenging. This challenge is compounded by the fact that surgeons are
often required to reconstruct the sagittal alignment of the spine, most
often by restoring the appropriate amount of lordosis. Restoration can
be difficult when distraction of the vertebral bodies at either end of
the defect is complicated, and when the vertebral body replacement device
is not adjustable. To improve this procedure, Medtronic Sofamor Danek
has developed a device that is highly versatile and readily expandable
to reconstruct the variable, complex spinal defects that result from this
form of surgery.
Features and Benefits
 The VERTE-SPAN® Vertebral Body Replacement device consists
of a perforated cylinder and two threaded endplates that allow for vertebral
replacement in the thoracic, thoracolumbar, and lumbar spine. The perforated
cylinder is threaded at each end. There are a variety of different cylinder
lengths and diameters to accommodate the variability of patient size,
anatomic variation, and the location and the size of the vertebral body
defect. The threaded endplates have large spikes on each end. These spikes
help stabilize the device in the vertebral endplates, and resist rotation
and expulsion of the construct. Expansion to the proper length and stability
is achieved by rotating the central cylinder within the endplates, lengthening
the overall assembly. There are a variety of endplate angle options that
make it possible to restore the normal contour of the spine. The variable
length and diameter of the VERTE-SPAN® device provides surgeons the ability
to span up to two vertebral bodies. Each cylinder has multiple perforations
for placement of bone graft.
VERTE-SPAN® Vertebral Body Replacement is not a stand-alone
device, and must be used with supplemental spinal fixation. Either anterior
or posterior instrumentation must be utilized to enhance the stability
of the reconstruction.
Click here to find a doctor who uses this
technology.
It is important that you discuss the potential risks, complications, and benefits of the VERTE-SPAN® with your doctor prior to receiving treatment, and that you rely on your physician's judgment. Only your doctor can determine whether you are a suitable candidate for this treatment.
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