What is Failed Back Surgery Syndrome, and why does pain persist after spine surgery?
Failed Back Surgery Syndrome (FBSS) is a clinical term for persistent or new back and leg pain that continues after one or more spinal surgeries. It is not a single diagnosis but a recognized pattern — surgery did not deliver the expected relief, and the underlying pain source was never fully resolved. Back surgery carries roughly a 40% failure rate according to peer-reviewed FBSS literature, and understanding why is the first step toward finding a path forward.
Pain can persist after spinal surgery for several reasons. Scar tissue may form around the nerve roots. Residual nerve compression can remain. Spinal instability may develop over time. One of the most common — and often overlooked — causes is persistent annular tears in the intervertebral discs. These tears allow inflammatory substances to leak out of the disc and irritate nearby nerves, producing chronic pain that surgical decompression or fusion alone cannot resolve.
For a deeper look at the full spectrum of FBSS causes and symptoms, see our guide: What Is Failed Back Surgery Syndrome? Causes, Symptoms, and Recovery Options.
How is FBSS diagnosed?
Diagnosis begins with a thorough review of your medical history, previous surgical records, current symptoms, and advanced imaging. Standard MRI is a useful starting point, but it does not always reveal subtle annular tears or the specific discs contributing to ongoing pain.
A key diagnostic step is the annulogram — an imaging-guided procedure that identifies every tear and leaking disc before treatment is planned. This step matters because treating the wrong disc, or missing a disc that is leaking, is one reason prior interventions fall short. A clinical evaluation is the only way to know with certainty which structures are driving your pain.
Can intra-annular fibrin injection help patients who have already had spine surgery?
For patients with FBSS whose persistent pain is linked to unhealed annular tears, intra-annular fibrin injection is a recognized treatment pathway. The procedure uses an FDA-approved fibrin sealant injected under imaging guidance directly into the identified disc tears. The fibrin acts as a biological sealant, closing the tears and reducing the leakage of inflammatory material that irritates surrounding nerves.
Outcome registry data shows that 80% of patients with prior failed surgery reported positive outcomes with fibrin injection. Individual outcomes vary, and candidacy depends on a full clinical evaluation — not every post-surgical spine is a candidate. But for patients whose FBSS is driven by disc-level pathology, this approach targets the structural problem rather than managing symptoms around it.
Clinical Note
The Valor team works with patients who have often been through years of treatment — physical therapy, medications, epidural injections, and sometimes more than one surgery — without lasting relief. What we see repeatedly is that the disc tears themselves were never closed. When inflammatory material continues to leak from an unstable annulus, surrounding nerves stay irritated regardless of what else has been tried. The annulogram changes the conversation: it shows exactly what is leaking and where. That information drives a treatment plan grounded in what is actually happening in the disc — not in what was assumed during a prior procedure.
What if physical therapy, injections, and repeat surgery have all failed?
For patients where every prior intervention has fallen short, the question shifts from “what haven’t I tried” to “what is actually causing the pain.” Epidural steroid injections, for example, have been found “not effective” for chronic low back pain in an AAFP systematic review — they address inflammation without closing the structural source. Physical therapy strengthens surrounding muscle but cannot repair a torn annulus. Repeat fusion adds fixation but leaves disc-level leakage unaddressed.
Fibrin disc treatment is designed to address the structural source directly. Among the most-tracked outcomes — over 7,000 procedures with long-term follow-up — the success rate is 83%, with individual outcomes varying based on patient-specific factors. For patients whose prior care has not resolved disc-level pathology, a clinical evaluation focused on the disc itself is a logical next step.
Related reading: How to Evaluate Spine Repair Options After Surgery.
How does biologic disc repair address the root cause of FBSS pain?
When annular tears are the primary pain driver, the mechanism is consistent: the outer wall of the disc (the annulus fibrosus) is torn, allowing the disc’s inner nucleus material and inflammatory mediators to leak outward and contact nearby nerve tissue. This is a structural problem, and structural problems require structural solutions.
The fibrin procedure introduces an FDA-approved fibrin sealant through a thin catheter under imaging guidance — no incisions, typically under one hour, with local or light sedation. The sealant seals the identified tears, restores the disc’s internal barrier, and removes the ongoing source of nerve irritation. The goal is not symptom suppression but disc stabilization at the tissue level.
For patients who have also developed problems at adjacent spinal levels following a prior fusion, see: What Is Adjacent Segment Disease? The Hidden Risk of Spinal Fusion.
What does recovery look like after the fibrin procedure for FBSS patients?
Recovery after the fibrin procedure is structured around protecting the healing disc. Patients are typically able to walk within 30 minutes of the outpatient procedure and are discharged the same day. For the first several weeks, heavy lifting, bending, and twisting should be avoided. Light activity — daily walking in particular — is encouraged to support circulation without stressing the disc.
Initial improvement is often noticed within the first few weeks. More meaningful, sustained relief typically develops at the three-to-six month mark as the fibrin sealant supports annular repair. The timeline reflects the biology of disc healing, not a procedural variable. Patients are guided through activity restrictions and return-to-function milestones by the clinical team.
How long do results last, and what does the outcome data show?
Long-term outcome data shows 70% patient satisfaction at two or more years of follow-up, and VAS pain scores tracked in peer-reviewed studies moved from a 72.4mm baseline to 33.0mm at 104 weeks. These are population-level statistics — individual outcomes vary based on disc condition, number of levels treated, prior surgical history, and patient health factors.
The intent of the fibrin procedure is durable structural repair, not temporary relief. Closing the annular tear removes the ongoing source of inflammatory leakage; over time, the disc’s internal environment stabilizes. This distinguishes the approach from treatments that manage symptoms without addressing the underlying disc pathology.
For more on what patients experience after prior surgery and how fibrin treatment fits that picture: From Failed Back Surgery to Lasting Sciatica Relief.
Is the fibrin procedure right for every FBSS patient?
Not every patient with post-surgical back pain is a candidate for intra-annular fibrin injection. The procedure is designed for patients whose ongoing pain is driven by disc-level annular tears. Patients with pain from other sources — pure facet-joint pathology, spinal instability requiring hardware revision, or neurological emergencies — require different clinical pathways.
A clinical evaluation, including imaging review and annulogram when appropriate, is the only way to determine whether disc-level pathology is the primary driver and whether the fibrin procedure is the right next step. The Valor team reviews existing MRIs at no cost as a starting point for that conversation.
Additional resources: How to Evaluate Regenerative Spine Care After Failed Surgery | Heal Post-Surgical Pain: Evaluate Regenerative Spine Care.
Frequently Asked Questions
What exactly is Failed Back Surgery Syndrome?
FBSS is a term for persistent or new back and leg pain that continues after one or more spinal surgeries, where the expected surgical relief was not achieved. It is not a single diagnosis — it describes a pattern of ongoing pain that requires further evaluation to identify the specific structural cause.
Can intra-annular fibrin injection be performed on a spine that has already had fusion hardware placed?
In many cases, yes. The fibrin procedure targets disc-level annular tears, which are separate structures from fusion hardware. Whether a previously fused spine is a candidate depends on the specific anatomy, the discs involved, and findings from a full clinical evaluation including imaging. A clinical evaluation is the only way to determine this with certainty.
What is an annulogram, and why does it matter for FBSS diagnosis?
An annulogram is an imaging-guided diagnostic procedure that identifies every tear and leaking disc before treatment is planned. Standard MRI does not always detect subtle annular tears. The annulogram maps exactly which discs are contributing to pain — a step that distinguishes targeted treatment from guesswork.
Is the fibrin sealant FDA-approved?
The fibrin sealant used in the procedure is FDA-approved as a sealant (manufactured by Baxter Pharmaceuticals). Specific clinical applications, candidacy, and outcomes vary by patient.
How is the fibrin procedure different from another spinal injection?
Standard spinal injections — such as epidural steroids — deliver anti-inflammatory medication to reduce pain temporarily but do not close or repair the disc tear itself. The fibrin procedure delivers a biologic sealant directly into the annular tear, with the goal of closing the structural defect and removing the ongoing source of inflammatory leakage. The intent is structural repair, not symptom suppression.
Does Valor Spine work with veterans who have FBSS?
The Valor team works directly with VA referral coordinators for veterans whose VA facility cannot provide timely or appropriate care. Under the Mission Act, the procedure may be a covered VA benefit in those circumstances. VA coverage is determined case-by-case by the VA, not by Valor Spine. Valor handles the referral coordination so veterans do not have to navigate that process alone. See: Cervical Adjacent Segment Disease Relief with Fibrin: How a Retired Army Crew Chief Avoided Revision Fusion.
What is the first step if I think I have FBSS?
The first step is a clinical evaluation — a review of your history, symptoms, prior surgical records, and existing imaging. The Valor team offers a no-cost MRI review as a starting point. A clinical evaluation is the only way to determine whether disc-level annular tears are driving your ongoing pain and whether the fibrin procedure is appropriate for your situation.
This content is for general informational purposes only and does not constitute medical advice, diagnosis, or treatment. It is not a substitute for evaluation by a qualified physician. Treatment decisions depend on your individual medical history and clinical findings. Schedule a consultation to discuss whether the procedure is right for you.
