posterior labral tear

Posterior Instability

Definition

 

Patients usually complain of subluxation rather than dislocation

- rarely requires reduction

 

Different entity to acute posterior dislocation usually

 

Epidemiology

 

Rare

 

Aetiology

 

1.  Ligamentous laxity > 50%

- commonly associated with MDI

- posterior only 20%

- posterior & inferior 20%