Posterior Cervical Fusion
A Patient's Guide to Posterior Cervical Fusion
Many neck problems are due to degenerative changes that occur in the intervertebral
discs of the cervical spine and the joints between each vertebra. Other problems
are the result of injury to parts of the spine or complications of earlier surgeries.
The vast majority of patients who have neck problems will not require any type
of operation. However, if the non-operative treatments fail to control your
pain or problems, your spine surgeon may suggest a posterior cervical fusion
to treat your neck problem.
The purpose of this information is to help you understand:
- The anatomy of the cervical spine
- The types of problems a posterior cervical fusion is used for
- The rationale for performing a posterior cervical fusion
- What you can expect from this procedure
In order to understand your symptoms and treatment options, you should start
with some understanding of the general anatomy of your neck. This includes becoming
familiar with the various parts that make up the neck and how these parts work
Please review the document, entitled:
Surgery is not necessary in every case. No one type of surgery works for every
neck pain problem. Numerous surgical procedures have been designed to treat
each type of neck pain. A posterior cervical fusion may be recommended for several
- To stop the motion between two or more vertebrae - or spinal segments
- To straighten the cervical spine and stop the progression of a spinal deformity
- To stabilize the spine after a fracture or dislocation of the cervical spine
The goal of a posterior spinal fusion is to allow two or more vertebrae to
grow together or fuse into one solid bone. If the operation is being done because
you are suffering from mechanical neck pain, the fusion can stop the excess
motion between the vertebrae caused by segmental instability. This can reduce
If your spine is unstable, due to a fracture or a dislocation of the vertebrae,
the fusion stabilizes the spine. This is particularly important when you have
not injured your spinal cord. Stabilizing the spine surgically can protect you
from spinal cord injury during the healing process. Even in cases when there
has been severe damage to the spinal cord leading to paralysis, a spinal fusion
may be recommended, so that you can get out of bed and into a wheelchair faster.
This allows early rehabilitation because the spine has been stabilized by the
A posterior cervical fusion may also be suggested to straighten the spine,
or control a deformity of the cervical spine such as a cervical kyphosis. The
cervical spine normally has a "C" shaped curve with the opening towards the
back. A "kyphotic" curve is exactly the opposite - the opening of the "C" points
forward. This deformity occurs when the cervical spine is unstable and begins
to bend forward.
For detailed information on cervical kyphosis, you may wish to review the document,
Posterior Cervical Fusion
The bone graft is usually taken from the pelvis at the time of surgery, but
some surgeons prefer to use bone graft obtained from a bone bank. Bone graft
from a bone bank is taken from organ donors and stored under sterile conditions
until needed for operations such as spinal fusion. The bone goes through a rigorous
testing procedure, similar to a blood transfusion. This is in order to reduce
the risk of passing on diseases, such as AIDS or hepatitis, to the recipient.
For more information to help you better understand bone graft, please review
the document, entitled:
There are two basic types of cervical spinal fusion:
Anterior Interbody Fusion
This type of fusion is much more common in the neck. This type of fusion is
described above. In the interbody fusion, a bone graft is placed between two
vertebrae and replaces the removed disc. During the healing process, the vertebrae
grow together, creating a solid piece of bone out of the two vertebrae.
This procedure is described more fully in the document, entitled:
In the posterior fusion, the bone graft is placed on the backside of the vertebrae.
During the healing process, the vertebrae grow together, creating a solid piece
of bone out of the two vertebrae. This type of fusion is used in the cervical
spine for fractures and dislocations of the cervical spine, and to correct deformities
in the neck such as cervical kyphosis.
Instrumented Posterior Cervical Fusion
When doing an anterior cervical fusion, the bone graft may simply be wedged
in between the vertebra. It is held there simply because it is wedged in tight.
In the case of a posterior cervical spine fusion, there is not anywhere to wedge
bone graft material, so the bone graft is simply laid on top of the lamina of
In recent years, there has been an increase in the use of metal plates, screws,
and rods to try to increase the success of helping the spine to fuse. Many different
types of metal implants are used; all try to hold the vertebrae in position
while the fusion heals. Bone heals best when it is held still, without motion
between the pieces trying to heal together. The healing of a fusion is no different
than healing a fractured bone, such as a broken arm. However, the neck is a
difficult part of the body to hold still.
In the past, casts and braces were used in an attempt to reduce the motion
in the neck and to increase the success rates of a spinal fusion. In most cases,
these braces and casts were simply too cumbersome to wear for three months,
and did a poor job of actually holding the neck still enough to allow the fusion
In the posterior cervical spine fusion, it is common to use stainless steel
wire to hold the bones together as they heal. The wires are wrapped around the
spinous processes, or under the lamina and twisted together. This creates a
fairly strong form of internal fixation that holds the bones in place while
By using wires, the vertebra can be held rigidly in place while the fusion
heals. Braces and casts are not needed.
With any surgery, there is a risk of complications. When surgery is done near
the spine and spinal cord these complications (if they occur) can be very serious.
Complications could involve subsequent pain and impairment and the need for
additional surgery. You should discuss the complications associated with surgery
with your doctor before surgery. The list of complications provided here is
not intended to be a complete list of complications and is not a substitute
for discussing the risks of surgery with your doctor. Only your doctor can evaluate
your condition and inform you of the risks of any medical treatment he or she
To understand more about the potential complications of spinal surgery, please
review the document, entitled:
Copyright © 2003 DePuy Acromed.
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