• Comminuted

• Intra-articular

• Fracture through base of thumb

• Prognosis: worse than Bennett's fracture
  (difficult to reduce)

Bennett's Fracture

• Intra-articular fracture/dislocation of base of 1st metacarpal

• Small fragment of 1st metacarpal continues to articulate with trapezium

• Lateral retraction of 1st metacarpal shaft by abductor pollicis longus
   

Barton's Fracture

• Intra-articular fracture of the dorsal margin of the distal radius

• Extends into radio-carpal joint
   

• Extra-articular fracture of the distal radius

• Does not extend into joint space

• Dorsal angulation with radial and dorsal displacement of distal fragment

• Frequently associated with fracture of ulnar styloid