Clinical Study
Minimally Invasive Transforaminal Lumbar Interbody Fusion at L5-S1 through a Unilateral Approach: Technical Feasibility and Outcomes
| Grade I | Fused with remodeling and trabeculae present |
| Grade II | Graft intact, not fully remodeled and incorporated, but no lucency present |
| Grade III | Graft intact, potential lucency present at top and bottom of graft |
| Grade IV | Fusion absent with collapse/resorption of the graft |
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