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Cervical Spine Surgery · Fusion
Occipitocervical Fusion
An in-depth, evidence-based explanation of occipitocervical fusion — stabilising the junction between the skull and the upper neck.
Occipitocervical fusion is an operation to stabilise the junction between the skull and the upper cervical spine — the craniocervical junction. This is the region where the head balances on the top of the neck, and instability here can be serious because the spinal cord and brainstem pass through it. The operation connects the back of the skull to the upper vertebrae with plates, screws and rods, holding this critical junction securely while it fuses. It is used for significant craniocervical instability from a range of causes. This page explains what it involves, when it can be considered, and what the evidence shows.
For information only — not medical advice. The content on this page is patient education to help you understand a condition or treatment. It is not a substitute for personalised assessment by a qualified clinician. Always consult your doctor or specialist about your own symptoms, diagnosis, and treatment decisions.
The problem it treats
The craniocervical junction can become unstable or deformed as a result of trauma, inflammatory conditions such as rheumatoid arthritis, tumour, infection, congenital differences, or the failure of previous surgery. Because the junction transmits loads from the head and surrounds the brainstem and upper spinal cord, significant instability or deformity here is potentially dangerous. Stabilising the skull to the upper neck can protect these critical neural structures and restore a stable, well-aligned foundation for the head.
What the operation involves
Occipitocervical fusion is carried out from the back. A plate is fixed to the base of the skull (the occiput), and screws are placed into the upper cervical vertebrae — often into C2 and the levels below — then connected by rods that lock the skull to the neck in the correct alignment. Where the cord or brainstem is being compressed, decompression may be carried out at the same time. Bone graft is applied so the construct fuses over the following months. Because of the critical anatomy, the operation is planned meticulously with image guidance.
When it can be considered
Occipitocervical fusion can be considered where there is significant instability or deformity of the craniocervical junction that threatens the neural structures or causes disabling symptoms — for example severe rheumatoid involvement, certain complex fractures, tumours, or congenital instability. Because it fuses the skull to the neck, it removes a substantial amount of head movement, particularly nodding and rotation, so it is reserved for situations where this stabilisation is genuinely needed. The decision is highly individualised to the cause and the person.
What the evidence shows
The evidence supports rigid internal fixation as a reliable means of achieving occipitocervical fusion. A systematic review of occipitocervical fusion techniques and outcomes, together with cohort studies of craniocervical stabilisation and long-term follow-up of rigid fixation, report high fusion rates and good stabilisation of this demanding region. The literature also documents the expected loss of movement and the importance of correct alignment. The balanced view is that occipitocervical fusion is an effective, well-established operation for serious craniocervical instability, carried out with careful planning given the critical anatomy.
What to expect
The operation is performed under general anaesthetic, usually with a hospital stay of several days. The construct provides immediate stability, while the fusion consolidates over the following months. The main expected trade-off is a significant reduction in head movement, since the skull is fixed to the neck. Rehabilitation supports recovery, and where the cord has been decompressed, neurological improvement may occur gradually. As with any operation there are risks, which are discussed fully beforehand. Whether this operation is the right choice is decided together.
Disclaimer. The information provided on this page is intended for educational purposes only and should not be considered personalised medical advice. Every patient is different, and treatment options, risks, expected recovery and outcomes depend upon an individual's diagnosis, general health and personal circumstances. Decisions regarding treatment should always be made following consultation with your treating spinal surgeon or healthcare professional.
Evidence & further reading
- —Winegar CD, et al. A systematic review of occipitocervical fusion: techniques and outcomes. J Neurosurg Spine 2010. (PMID 20594011)
- —Martinez-Del-Campo E, et al. Surgical treatment of craniocervical instability: comparison of two constructs in 100 patients. Eur Spine J 2023. (PMID 37294357)
- —Nockels RP, et al. Occipitocervical fusion with rigid internal fixation: long-term follow-up data. J Neurosurg Spine 2007. (PMID 23826478)
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