Grading | Fusion | Description |
---|---|---|
A | Solid | big trabeculated fusion, bilaterally |
B | Possibly Solid | big fusion mass at unilateral with a small fusion mass at the contralateral side |
C | Probably Not Solid | small, thin fusion masses bilaterally with apparent crack |
D | Definitely Not Solid | graft resorption bilaterally or fusion mass with an obvious bilateral pseudarthrosis |