What Is Facet Joint Pain and How Does RF Rhizotomy Help?
The small facet joints behind the vertebrae, present in pairs at every level, provide the movement and balance of the spine. When these joints are worn by age, overloading or arthrosis, they can produce mechanical back or neck pain. Facet-related pain is typically localised in the back (or neck), increases on standing and leaning backwards, causes morning stiffness and generally does not radiate predominantly into the leg. RF rhizotomy temporarily interrupts the signal by delivering controlled heat energy to the small nerve branches (medial branch) that carry the pain signal from these joints. The procedure is performed under fluoroscopy, by needle, mostly under local anaesthesia, and does not require open surgery. The aim is to reduce pain transmission — not to 'repair' the joint.
First the Right Diagnosis: Is the Pain Truly Facet-Related?
The most critical step in the success of RF rhizotomy is correctly establishing that the pain truly arises from the facet joint. Because not every back pain is facet-related — disc herniation, canal stenosis, muscle-ligament-related pain or other causes can give similar complaints. Therefore, before deciding on RF, a detailed examination, imaging and, where needed, diagnostic nerve blocks are performed: a temporary anaesthetic is given to the pain-carrying nerve branch and it is observed whether the pain is significantly reduced. If the diagnostic block significantly reduces the pain, the likelihood that RF rhizotomy will work increases. If this step is skipped, an RF procedure aimed at the wrong source brings no benefit. In short, RF is a targeted tool in a patient with the right diagnosis; it is not a method to be applied before the diagnosis is clear.
Who Is Suitable, and Who Is Not?
RF rhizotomy can be considered in patients with mechanical back or neck pain thought to be facet-joint-related and persisting despite medication, exercise, posture adjustment and physical therapy. It can be especially meaningful in patients in whom the facet source has been supported by a diagnostic block. By contrast, if the real source of the pain is a disc herniation, significant nerve root compression or canal stenosis, RF does not resolve these problems and can lead to overlooking the actual problem. In the presence of predominantly leg-radiating sciatica-type pain, progressive weakness or neurological findings, RF is not an appropriate starting point; in these situations the actual pathology (for example a disc herniation) must first be properly addressed. In other words, RF is valuable for the right type of pain; in the wrong indication it is an inadequate method.
Is Its Effect Permanent? Realistic Expectations
The most common misunderstanding about the effect of RF rhizotomy concerns permanence. The honest picture is this: RF reduces pain transmission in the targeted nerve branches, but because these branches can regenerate over time, the duration of effect may be limited and the pain may recur after a while. How long the effect lasts varies according to the patient, the true source of the pain and the degree of wear in the joint. The RF procedure can be repeated when needed. Setting the right expectation is important: rather than thinking 'RF will permanently cure my back', it is more realistic to think 'it may help reduce my mechanical pain for a period and improve my medication need and quality of life'. No guarantee of 'definite and permanent cure' can be given for any intervention.
Recovery, Risks and the Whole of Treatment
Because RF rhizotomy is a closed procedure, return to daily life is fast in most patients; it is possible to stand up shortly after the procedure. In the first days, temporary tenderness or a short-term increase in pain may be seen at the procedure site; the reduction in mechanical pain usually settles in gradually within a few weeks. Like any intervention, RF is not without risk: rarely there are possibilities such as temporary numbness, discomfort at the procedure site or infection, and these are discussed during the informed consent process. RF on its own is not an 'end of treatment' but a part of the whole: spine hygiene, posture correction, weight control and regular exercise remain decisive in the long-term management of facet joint pain. The treatment plan is created in a patient-specific process in which examination, imaging and assessment are considered together.