Distal radioulnar articulation

The distal radioulnar joint ( " body distal ulnar- joint ", distal radioulnar joint, abbreviated DRUG ) is a joint of the upper limb, in which the distal ends of spoke ( epiphysis distalis radii ) and Elle (Elle head, caput ulna ) are connected. The distal radioulnar joint is a pivot joint with only one axis of movement. The spoke to Elle and thereby enables the Umwendebewegungen the hand ( pronation and supination ) - It turns - with involvement of the proximal radioulnar joint.

The articular surface of the ulna head is called circumferentia articular, the spokes of the lower end than the ulnar notch. Immediately distal to the joint, the joint washer between Elle and triangle leg is attached to the ulna, which completely separates the distal radioulnar joint from the upper wrist. The stability of the joint is ensured primarily by a fibrocartilaginous joint between disc which is called " Triangulärer fibrokartilaginärer complex" ( TFCC ).

Discomfort

The joint is important for a free wrist mobility, for free pronation and supination and for good stability of great. Especially with an excess length of the ulna ( " ulna plus" ), which is often congenital or the result of a healed fracture of the radius in shortening, can cause damage to the cartilage complex and the distal radioulnar joint arthrosis.

Therapeutic can be a partial or complete resection of the ulnar end, or a fusion of the distal end of the radius after resection of a proximal Diaphysenanteils. Also, there are hemi- endoprostheses, in which only the ulnar component is replaced by a prosthesis and the ligaments is reconstructed. In addition, there are also coupled total joint, such as the Scheker prosthesis, which are particularly useful for other intractable instability.