The Thompson and Epstein classification is a system of categorizing posterior fracture/dislocations of the hip. [1] [2]
| Type | Description | 
|---|---|
| I | with or without a minor fracture | 
| II | with a large single fracture of the posterior acetabular rim | 
| III | with comminution of the acetabular ring | 
| IV | with a fracture of the acetabular floor | 
| V | with a fracture of the femoral head |