RADIOLOGICAL FUSION AND FUNCTIONAL RECOVERY AFTER TRANSFORAMINAL LUMBAR INTERBODY FUSION IN DEGENERATIVE LUMBAR CANAL STENOSIS

Abstract

Degenerative lumbar canal stenosis is a frequent source of pain and neurological compromise in adults. In patients who do not respond to conservative treatment, surgical intervention combining decompression and stabilization may be necessary.

Objective:
To assess radiological fusion and neurological outcomes following transforaminal lumbar interbody fusion (TLIF) in patients with degenerative lumbar canal stenosis.

Methods:
This observational study included 40 adult patients with symptomatic degenerative lumbar canal stenosis who underwent TLIF at a tertiary care institution. Preoperative neurological status was documented using the American Spinal Injury Association (ASIA) impairment scale. Radiological assessment focused on ligamentum flavum hypertrophy, facet joint degeneration, and fusion status at follow-up using the Bridwell grading system. Outcomes were analysed using descriptive statistical methods.

Results:
Most patients were middle-aged or elderly, with a slight male predominance. Preoperatively, the majority had preserved neurological function (ASIA grades D and E). Radiological evaluation demonstrated ligamentum flavum hypertrophy in 70% of patients and facet joint arthropathy in 67.5%. At follow-up, solid interbody fusion (Bridwell grade I) was observed in 80% of cases, while the remaining patients achieved grade II fusion. No implant-related complications or evidence of pseudoarthrosis were noted.

Conclusion:
TLIF results in dependable radiological fusion while maintaining neurological function in patients with degenerative lumbar canal stenosis. The procedure represents a reliable surgical option when decompression alone may not provide adequate spinal stability.