Classification of ACL avulsion fractures (diagram)
Citation, DOI & case data
Loading Stack -
0 images remaining
Type 1 - minimally/non-displaced fragment
Type 2 - anterior elevation of the fragment
Type 3 - complete seperation of the fragment. 3b - Involves the majority of the eminence.
Type 4 - comminuted avulsion or a rotation of the fragment.
These illustrations are based on the Meyers and McKeever classification system.
- Type 1 - minimally/non-displaced fragment
- Type 2 - anterior elevation of the fragment
- Type 3 - complete separation of the fragment. 3b - Involves the majority of the eminence.
- Type 4 - comminuted avulsion or a rotation of the fragment.
I've lightly indicated a type 4 "b" to show a rotational type 4 in contrast to the comminuted type 4. No type 4b has been described in the literature. Both rotated fragments and comminuted avulsions have been referred to as just "type 4."