distal radioulnar

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  • Injuries to the distal radioulnar articulation often result from falls onto an outstretched hand.
  • The alignment of the distal radioulnar joint is also important as this can be a source of a pain and loss of rotation after final healing and maximum recovery.
  • The distal radioulnar articulation is the one of the two closest to the wrist and hand.
  • The major exception is when the joint between these bones, the distal radioulnar joint (or DRUJ), is unstable.
  • The TFCC is a fibrous structure covering both the radiocarpal and distal radioulnar joint.
  • The distal radioulnar joint is a pivot joint located between the bones of the forearm, the radius and ulna.
  • The distal radioulnar articulation pivot-joint formed between the head of ulna and the ulnar notch on the lower extremity of radius.
  • Together with the proximal radioulnar joint, the distal radioulnar joint permits pronation and supination.
  • Behind, it is closely adherent to the anterior border of the articular disk of the distal radioulnar articulation.
  • The RUL's are the principal stabilizers of the distal radioulnar joint (DRUJ).
  • However, movements at the wrist can not be properly described without including movements in the distal radioulnar joint in which the rotary actions of supination and pronation occur and this joint is therefore normally regarded as part of the wrist.
  • The distal radioulnar articulation (inferior radioulnar joint) is a joint between the two bones in the forearm; the radius and ulna.
  • These two articular surfaces are separated by a prominent ridge, to which the base of the triangular articular disk is attached; this disk separates the wrist-joint from the distal radioulnar articulation.
  • The Galeazzi fracture is a fracture of the radius with dislocation of the distal radioulnar joint.
  • The dorsal radioulnar ligament (posterior radioulnar ligament) extends between corresponding surfaces on the dorsal aspect of the distal radioulnar articulation.
  • Along with the proximal and distal radioulnar articulations, an interosseous membrane originates medially along the length of the body of the radius to attach the radius to the ulna.
  • Estaminet classified injuries of the distal radioulnar articulation into four categories with two sublcasses: purely ligamentous (subclass A) and those with associated boney injury (subclass B).
  • Investigation of a potential distal radial fracture includes assessment of the angle of the joint surface on lateral X-ray, the loss of length of the radius from the collapse of the fracture, and congruency of the distal radioulnar joint.
  • 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).
  • The articular surface for the ulna is called the ulnar notch (sigmoid cavity) of the radius; it is in the distal radius, and is narrow, concave, smooth, and articulates with the head of the ulna forming the distal radioulnar joint.