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Classification systems used in the papers reviewed.
| Judet’s classification with Metaizeau Modificationa | ||
| Grade 1 | Undisplaced | |
| Grade 2 | Angulation <30° and Translation <50% | |
| Grade 3 | Angulation 30-60° or Translation 50–100% | |
| Grade 4a | Angulation 60-80° | Or Translation >100% |
| Grade 4b | Angulation >80° | |
| O’Brien’s classification | ||
| Grade 1 | Angulation <30° | |
| Grade 2 | Angulation 30-60° | |
| Grade 3 | Angulation >60° | |
Metaizeau subclassified Grade 4 into 4a/4b
