double screw

Epidemiology

Young men

Aetiology

FOOSH

- axial load, dorsiflexion and radial deviation

DISI occurs in ulna deviation

Herbert Classification

Type A    Stable acute fracture

A1 Tubercle

NHx

Convincing association with development of osteoarthritis

- arthritic changes beginning at radial styloid

- progress to scaphocapitate & capitolunate