Natural History
Nonunion is rare; almost all of these fractures heal. However, if the fracture is unstable the deformity at the fracture site will increase and cause limitation of wrist motion and forearm rotation, pronation and supination. If the joint surface is damaged and heals with more than 1–2 mm of unevenness, the wrist joint will be prone to post-traumatic osteoarthritis (Figures 4 and 5). Displaced fractures of the ulnar styloid base associated with a distal radius fracture result in instability of the distal radioulnar joint and resulting loss of forearm rotation (Figure 6).
Read more about this topic: Distal Radius Fracture
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