Mechanism
Hyperextension or hyperflexion leads to avulsion
Classification
- Type 1: undisplaced
- Type 2: displaced hinging posteriorly
- Type 3: displaced with complete separation
Meyers and McKeever "Fractures of the intercondylar eminence of the tibia"JBJS 52A: 1677-1684, 1970
Treatment
- Type 1 and 2
- CR with knee in extension likely to be successful
- If CR not successful, ORIF
- Type 3 : ORIF
Prognosis
- Good
- Low incidence of late instability
- If malunion occurs, may get impingement in extension