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Meyers and McKeever classification of tibial spine avulsion fractures.
| Type | I | Nondisplaced or minimally displaced |
| II | Anterior 1/3 to 1/2 of the avulsed bone displaced proximally (beak-like deformity on lateral radiograph) | |
| III | Bone completely displaced from its bed | |
| IV | Displaced and comminuted |
