Universal Classification of Dorsal Displaced Radius Fractures : Wheeless' Textbook of Orthopaedics

- Type I: extra articular, undisplaced;
- Type II: extra articular, displaced;
- Type III intra articular, undisplaced;
- Type IV: intra articular, displaced

Intra-articular fractures of the distal end of the radius in young adults.