Impact Factors on Posterior Modified Transfacet Debridement for Thoracic Spinal Tuberculosis Basing on Regression and Classification Analysis

Table 1

The modified criteria of Lee et al for radiological fusion.

Grade	Description
Definitive fusion	Definitive bony trabecular bridging across the graft-host interface, no movement (<3°) on a flexion-extension radiograph and no gap at the interface
Probable fusion	No definitive bony trabecular crossing, but no detectable movement and no identifiable gap at the interface
Possible pseudarthrosis	No bony trabecular crossing, no movement, but identifiable gap at the interface
Definite pseudarthrosis	No traversing trabecular bone, definitive gap, and movement >3°