What deformity is associated with a fracture of the distal radius and commonly presents with a wrist dislocation?

The deformity associated with a fracture of the distal radius that commonly presents with a wrist dislocation is Barton’s fracture. This type of fracture involves an intra-articular break at the distal radius with varying degrees of carpal displacement. It typically occurs as a result of a fall on an outstretched hand, leading to a fracture that may cause the distal fragment to become displaced.

The wrist dislocation occurs because the fracture compromises the stability of the wrist joint. This is distinct from other types of distal radius fractures such as Smith's fracture, which is characterized by volar angulation of the distal fragment, or Colles’ fracture, which is known for dorsal angulation. Monteggia's fracture, on the other hand, involves the ulna and is not directly associated with the distal radius.

The mechanism of injury and the resulting instability in Barton’s fracture are key factors that lead to the associated dislocation. Hence, recognizing the characteristics and implications of this type of fracture is crucial for surgical management and correcting associated injuries.