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The major exception is when the joint between these bones, the distal radioulnar joint (or DRUJ), is unstable. When the DRUJ is unstable, the ulnar styloid may require independent treatment. An excessively long styloid process of the ulna can cause painful contact with the triquetral bone in the wrist, known as ulnar styloid impaction syndrome. [1]
Darrach's procedure or distal ulna resection is a surgical technique for the surgical removal of the head of ulna. It is performed in cases of radial–ulnar joint pain and instability. [1] The styloid process and muscular attachments are left intact. [2] Weakness and instability can develop after the procedure.
Near the wrist, the ulnar, with two eminences; the lateral and larger is a rounded, articular eminence, termed the head of the ulna; the medial, narrower and more projecting, is a non-articular eminence, the ulnar styloid process. The head of the ulna presents an articular surface, part of which, of an oval or semilunar form, is directed ...
The ulna is approached from the subcutaneous border. A plate is attached to the distal end of the ulna, to plan the osteotomy. An oblique segment is removed from the ulna, after which the distal radial-ulnar joint is freed, making sure structures stay attached to the styloid process. After this, the freed distal end is reattached to the ...
ulna bone of the lower arm - Ulnar styloid process; Third metacarpal - Third metacarpal styloid process; Tibia and Fibula - Tibial process, fibular process. 5th metatarsal of the foot - also known as the tuberosity of the fifth metatarsal; In botany, a styloid is a needle-shaped crystal of calcium oxalate found in some plants.
These ligaments arise from the distal radius medial border and insert on the ulna at two separate and distinct sites: the ulna styloid and the fovea (a groove that separates the ulnar styloid from the ulnar head). Each ligament consists of a superficial component and a deep component. The superficial components insert directly onto the ulna ...
The triquetral bone may be distinguished by its pyramidal shape, and by an oval isolated facet for articulation with the pisiform bone. It is situated at the upper and ulnar side of the carpus. To facilitate its palpation in an exam, the hand must be radially deviated so that the triquetrium moves out from under the ulnar styloid process.
proximal ulna fracture with dislocation of radial head: blow to forearm: Monteggia fracture at Whonamedit? Moore's fracture: Edward Mott Moore: distal radius fracture with ulnar dislocation and entrapment of styloid process under annular ligament: Moore's fracture at TheFreeDictionary.com: Pipkin fracture-dislocation: G. Pipkin