Start with the target: pain attributed to facet joints.
Radiofrequency ablation (RFA) and medial branch transection (MBT) both aim to interrupt signals from nerve branches supplying selected facet joints. The first question is whether those joints are a convincing source of the pain.
A procedure name cannot answer that question. Prior treatment records and the response to diagnostic blocks help make the discussion specific to you.
How facet-joint pain is assessedWhat is the difference between MBT and RFA?
| Question | Needle RFA | Mechanical MBT |
|---|---|---|
| How is the nerve treated? | Radiofrequency energy produces heat near the targeted nerve. | The targeted branch is identified endoscopically and cut. |
| How is the area reached? | A needle-based procedure guided by imaging. | An endoscopic surgical approach using a camera and instruments. |
| What does it aim to change? | Pain signaling from selected facet joints. | Pain signaling from selected facet joints. |
| What does it leave untreated? | It does not rebuild an arthritic joint or decompress a spinal nerve. | It does not rebuild an arthritic joint or decompress a spinal nerve. |
If pain returns after RFA, what should I ask?
A useful conversation starts with what the previous procedure actually changed. Which pain improved, for how long, and is the current pain the same? Bring the procedure report, levels treated and any pain diary you were asked to keep.
Dr. Houle may discuss MBT as one option for selected patients. A return of pain is a reason to reassess the explanation and choices; it does not by itself establish that another procedure is necessary.
Is “endoscopic rhizotomy” the same operation?
You may encounter the terms endoscopic rhizotomy, neurotomy or denervation. They are used for related procedures, but they do not reliably tell you how the nerve was treated. An endoscopic procedure may use radiofrequency energy, mechanical transection or additional work around the joint capsule.
Ask which technique is being proposed. Results from a study of endoscopic RF or capsular treatment should not automatically be described as results of mechanical MBT.
Does MBT guarantee longer or permanent relief?
No procedure can promise permanent relief for an individual. Published studies of related endoscopic techniques vary in technique, patient selection and follow-up. Those differences limit broad claims that one method is always better.
Discuss both benefit and risk. Medial branches also supply parts of the multifidus muscles. That muscle supply, the levels being treated and the rehabilitation plan belong in the conversation, along with risks such as infection, bleeding, nerve injury and incomplete relief.
MBT: candidacy, evidence, risks and recoverySources and context
Sources checked November 8, 2026. General education; treatment recommendations require an evaluation. Manufacturer descriptions are distinct from clinical evidence. The main MBT guide links the comparative studies and explains their limits.
ASRA Pain Medicine: treatment options, blocks and RFA Cohen et al., 2020: lumbar facet interventions and nerve supply Arthrex: mechanical MBT explanation — manufacturer education