Failure of the expected bony union after spinal fusion, which may cause symptoms or be found during follow-up.
Pathology
Mechanism and manifestations
Persistent pain, motion at the operated site or hardware problems may raise suspicion. Postoperative pain does not automatically mean pseudarthrosis.
Diagnosis and management
The surgeon compares clinical progress with radiographs and sometimes CT. Optimizing healing factors, monitoring or revision surgery depends on the case. Traction and manipulation at the fusion require clearance from the team aware of actual union status.
Points to consider
The age of changes, symptoms and previous investigations help interpret abnormalities. After surgery, operated levels, implants and surgical restrictions matter. Recent deterioration should not automatically be attributed to ordinary wear or familiar stiffness.
Role of TAGMED care
This condition first requires medical diagnosis and, depending on the situation, specialist management. TAGMED services do not replace treatment of infection or tumor, stabilization of an unstable injury, or neurological or vascular treatment. Any conservative support should be considered only after diagnosis, restrictions and the treating team’s recommendations have been clarified.
Related concepts and distinctions
These concepts belong to the same field, but are not synonyms.
- Uncovertebral osteoarthritis — Degeneration of cervical uncovertebral joints that may produce osteophytes and contribute to foraminal narrowing.
- Kümmell disease — Delayed vertebral collapse after fracture, often associated with nonunion and an intravertebral cleft, frequently in the setting of fragile bone.
Conceptual guide: Pseudarthrosis after spinal fusion. Blocks summarize useful relationships; they are not an individual anatomical image.
Medical references
- American Academy of Orthopaedic Surgeons. Spinal Fusion.
- American College of Radiology / RSNA, RadiologyInfo. Spine MRI.
References document the topic; their inclusion does not imply endorsement of TAGMED services by those organizations.
Educational information from The Spine Page. This entry does not replace an individual assessment. Documentary version: October 13, 2026. Sylvain Desforges, B.Sc., D.O., N.D., osteopath and naturopath.
TAGMED clinic contact details
For non-urgent consultations and information about available services.
Clinique TAGMED — Terrebonne
1150, rue Lévis, Suite 200
Terrebonne (Québec) J6W 5S6
450‑704‑4447
Clinique TAGMED — Montréal
1140, avenue Beaumont
Mont-Royal (Québec) H3P 3E5
1‑877‑672‑9060
