Spinal realignment during fusion was linked to fewer failures of bone union
A pooled surgical comparison found lower odds of failed bone fusion with realignment, without clear differences in pain, disability or repeat operations.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
For patients undergoing fusion for isthmic spondylolisthesis, adding reduction was associated with lower odds of pseudarthrosis, meaning failure of the bones to fuse. The analysis did not detect significant differences in pain improvement, disability improvement or reoperation rates. The bone-healing result therefore does not establish better symptom relief or overall surgical superiority.
The abstract does not specify the included study designs, follow-up lengths or a confidence interval for the odds ratio. These gaps limit confidence in the bone-healing result, and nonsignificant symptom comparisons do not establish equivalence.
What researchers found
Odds ratio for failed bone fusion (pseudarthrosis)
Fusion with realignment versus fusion in the existing position, at last follow-up. Follow-up length and a confidence interval were not reported.
The surgical comparison
Reduction repositions the slipped vertebra during fusion; in situ fusion leaves it in its existing position. The review found no statistically significant differences in blood loss, operation time or hospital stay.
Reading the odds ratio
One would mean equal odds. The estimate means the odds of failed fusion with realignment were 0.22 times those with fusion in place. It does not provide the absolute chance of failure in either group.
The original publication
Reduction versus fusion in situ for isthmic spondylolisthesis: a systematic review and meta-analysis.
Johnson SE, Nguyen R, Papisetty K et al.
J Neurosurg Spine · 2025
- PubMed ID
- 41043182
- Record checked
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