Procedure · Cervical spine
Posterior Cervical Fusion
Decompresses the spinal cord and nerves from the back of the neck and stabilizes the levels with screws and rods — the posterior answer when disease spans several levels, or when anterior surgery is the wrong approach. In select cases, it is combined with an anterior approach.
What it is
Posterior cervical fusion treats a compressed spinal cord and compressed nerve roots from behind. Through an incision at the back of the neck, the lamina — the bony arch roofing the canal — is removed across the compressed levels, giving the cord and the roots room. Because removing that bone across several levels can leave the neck unstable, screws are placed in the lateral masses, the sturdy bone at the sides of each vertebra, and joined by rods; over the following months the instrumented levels grow together into one solid segment.
The posterior corridor has a particular virtue — it sees every cervical level in one field. Compression that runs from C3 to C6 is a single problem from behind, where anteriorly it would be three. The trade is made in the posterior muscles, which form the corridor and are sore for it, and in motion: fused levels do not bend again. Both costs are real, and both are weighed openly in the consultation.
When it may be considered
The operation is considered for cervical stenosis that has produced myelopathy, radiculopathy, or both — typically multilevel disease, compression spanning three or more levels in general; for instability, where vertebrae shift abnormally; for deformity, including a neck that has lost its curve or fallen into kyphosis and needs its alignment corrected and held; for ossification of the posterior longitudinal ligament, a long front-sided compression best floated free from behind; and for selected fractures, tumors, and revisions of earlier anterior surgery. Among the fractures, the role is stabilization: certain traumatic injuries leave the cervical spine unstable, and the instrumentation realigns it and holds it while the injury heals, protecting the cord in the meantime. The common thread is a problem too long, too unstable, or too deformed for an anterior operation to solve alone. At times the plan uses both corridors — the fusion combined with an anterior procedure as one treatment plan, when the disease demands it.
What to discuss at consultation
- Goals: decompress the cord across every involved level and leave the neck aligned and stable — both, or the operation has only done half its work.
- Alternatives: ACDF for one or two front-sided levels; cervical disc replacement for select single-level disease; posterior cervical foraminotomy for a single nerve root without instability; laminectomy alone when alignment and stability genuinely permit it.
- Recovery: a rigid collar for the first weeks, posterior muscle soreness as the early headline, and a fusion that consolidates across three to six months.
- Risks: C5 palsy, wound infection, dural tear, nonunion, and the long-horizon question of stress at the levels above and below the fusion.
Who is a good candidate
The strongest candidates share a pattern the imaging makes plain:
- Compression of the cord, the nerve roots, or both — typically spanning three or more levels — with myelopathy, radiculopathy, or the two together
- Instability or deformity at the involved levels that decompression alone would worsen
- Compression seated behind the cord, or a long ossified ligament in front of it
- Alignment that is preserved — or that the operation itself can restore and hold
- An earlier anterior operation that has failed, or anatomy that makes the anterior corridor unsafe
Patients with one or two front-sided levels and healthy alignment are usually better served by an anterior approach; the posterior operation is not a default, it is a match.
What recovery actually looks like
Day 1–3. Most patients are in the hospital one to three nights and walking the day of surgery. The collar is on. Posterior neck and shoulder soreness is prominent — this is the muscle corridor healing — and it, rather than the neck's front, dominates the first week.
Week 1–2. Collar full-time, walking daily, wound check. Desk work is possible for some patients by the end of this window; driving is not, while the collar restricts rotation.
Weeks 4–6. The collar weans as early healing and imaging allow. Therapy begins: posture, shoulder mechanics, and gentle motion at the levels that remain unfused.
3 months. The fusion is consolidating; activity widens accordingly. Strength and — where myelopathy was the indication — gait and hand function continue their slower recovery across the following year, and follow-up measures them at each visit.
Risks and how they are minimized
C5 palsy — weakness lifting the arm, appearing days after decompression — is the risk most specific to this operation, reported in roughly five to ten percent of cases and usually recovering over weeks to months. Wound infection is more frequent from behind than from the front of the neck, and is guarded by meticulous closure and wound surveillance. Dural tear, bleeding, and anesthesia risks are shared with other major spine operations. Over years, the levels bordering a long fusion work harder and can wear — adjacent segment disease — which is a reason the construct is never built longer than the disease requires. Nonunion, a fusion that fails to consolidate, is the risk most sensitive to the patient's own biology; smoking cessation and bone health are addressed before elective surgery, not after.
Minimization is mostly planning: neuromonitoring through the case, decompression wide enough that the cord is never the instrument's problem, screw placement checked against the patient's own anatomy, and a construct length justified level by level.
Alternatives considered first
Conservative care has a real but bounded role here — it can manage radicular pain, but progressive myelopathy is a surgical diagnosis, and watching a cord lose function is not a neutral choice. Injections are performed by interventional pain specialists; when one is relevant to pain symptoms, you may be referred as part of a comprehensive care plan. The surgical alternatives are the anterior operations — ACDF and disc replacement — and the smaller posterior one, foraminotomy, which treats one root and fuses nothing. Laminectomy without fusion is the closest alternative and the right one in a well-aligned, stable neck; the choice between it and fusion is the central judgment this page keeps returning to.
Related procedures
ACDF is the anterior counterpart — same disease, opposite corridor, fewer levels at a time. Posterior cervical foraminotomy is the smaller posterior operation for a single root. Corpectomy addresses compression seated in the vertebral body itself, and the general decompression page explains where fusion joins decompression and where it does not.
Conditions this procedure treats
This procedure is most often used for: Cervical myelopathy, Cervical radiculopathy, Cervical stenosis, Spinal cord compression.
Frequently asked questions
What is posterior cervical fusion?
Posterior cervical fusion decompresses and stabilizes the neck from behind. The lamina — the bony roof over the canal — is removed where the spinal cord or nerves are compressed, and screws placed in the lateral masses of the vertebrae are joined by rods so the treated levels heal together as one solid segment. Working from the back gives the surgeon every level of the cervical spine in a single field, which is why the operation suits disease that spans three or more levels. The fusion is the price of that access when the spine also needs stability — and for multilevel compression of the cord and roots, it is usually the right price.
How is posterior cervical fusion different from ACDF?
The corridor and the reach. ACDF works from the front of the neck, through the disc space — an elegant route to one or two levels, with the swallowing and voice structures as its neighborhood concerns. Posterior fusion works from behind, across as many levels as the disease involves, and leaves the front of the neck untouched; its early cost is borne instead by the posterior neck muscles, which are sore for weeks. Neither is the better operation in the abstract. Multilevel compression, deformity, and certain patterns of disease point behind; one or two front-sided levels usually point in front.
When is the back-of-the-neck approach the better choice?
When the compression spans three or more levels, when it sits behind the cord rather than in front of it, when the spine is unstable or deformed and needs its alignment held, or when an anterior operation has already been done and the problem persists. Ossification of the ligament behind the vertebral bodies — a long, front-sided compression that cannot be removed disc by disc — is another classic indication. The approach follows the anatomy of the disease; the posterior route earns its place when the anterior route cannot reach the whole problem safely.
How many levels can be treated at once?
As many as the disease requires — that is the operation's defining strength. Three- and four-level decompressions with fusion are common, and constructs can extend from the skull base region to the upper thoracic spine when deformity or instability demands it. Each added level trades away a share of neck motion and adds to the operation, so the construct is built to the measurement of the disease, not beyond it. The plan is drawn level by level from the imaging: every segment in the fusion is there for a stated reason.
Will I need to wear a collar afterward?
Usually, yes — a rigid cervical collar for the first several weeks is standard after posterior cervical fusion, protecting the instrumentation while the early healing organizes. The exact duration follows the construct and the bone quality, and it is weaned under guidance rather than abandoned on a date. This differs from many anterior operations, where collar use is shorter or softer. Expect the collar to be a real feature of the first month or two, planned around — driving waits until it comes off and neck rotation is cleared.
What is recovery like after posterior cervical fusion?
The first days are dominated by posterior neck and shoulder soreness — the muscles of the back of the neck were the corridor, and they announce it. Most patients spend one to three nights in the hospital and walk the day of surgery. The first two weeks are collar, walking, and wound care. Across weeks four to six the collar weans and therapy begins restoring what motion the unfused levels keep. The fusion itself consolidates over three to six months and matures toward a year; activity widens in step with it. Cord recovery, when myelopathy was the indication, runs on its own slower clock behind all of this.
What is C5 palsy?
C5 palsy is a weakness that appears in the days after cervical decompression — classically in the deltoid, making it hard to lift the arm away from the body, sometimes with shoulder pain or numbness. It is reported in roughly five to ten percent of posterior cervical operations. The leading explanation is the spinal cord shifting backward after decompression and tugging the short C5 root with it. The reassuring part of the picture: most cases recover substantially over weeks to months with therapy and time. It is a risk discussed before surgery precisely because, while uncommon and usually temporary, it is not rare enough to omit.
How much neck motion will I lose?
Some — that is the honest trade at the center of any fusion. The cervical spine shares rotation and bending across seven levels, so fusing three or four of them reduces total motion noticeably but rarely disables it; most patients turn adequately for daily life, with driving the last activity to normalize. The levels, not the operation's name, decide the cost: a fusion ending high in the neck costs more motion than one confined to the lower levels. The consultation should put a plain estimate on it for your specific construct — before, not after.
How long does it take a posterior cervical fusion to heal?
Bone healing follows its usual calendar: the construct is stable from the day of surgery thanks to the screws and rods, early bridging bone appears across the first three months, consolidation is expected by about six months, and the fusion mass keeps maturing toward a year. Imaging at intervals confirms progress. Smoking and poor bone quality slow the biology meaningfully, which is why both are addressed before an elective operation. The hardware is scaffolding; the fusion is the patient's own bone, and it cannot be rushed — only protected while it forms.
From Back Talk
Related reading: Cervical Myelopathy: Cord Compression
Care pathway
Cervical myelopathyComputer-assisted navigationDr. Jihoon ChoiRockwall · Garland · Forney · Greenville
Initial consultation or second opinion?
Told you need a multilevel cervical fusion — or wondering whether an anterior approach is truly the only route? Bring your imaging. Dr. Choi will show you which corridor your anatomy favors, and why. Call (972) 817-7450 or request a visit online.