Ziel der Therapie muss es sein, die ursprüngliche Anatomie wiederherzustellen. Kombinationen von Achsenabweichung und Instabilität sind häufig und müssen diagnostisch erfasst werden, da jede Gelenkinkongruenz auf Dauer zur Arthrose der betroffenen Gelenke führt und dann nur noch funktionseinschränkende Rettungsoperationen zulässt. Achsenabweichungen dieser knöchernen Strukturen führen ebenso zur Einschränkung der Drehfunktion wie Verletzungen der für die Stabilität verantwortlichen, komplexen Weichteilstrukturen. Die Drehbewegung wird gewährleistet durch die gleichzeitige Rotation im proximalen und distalen Radioulnargelenk, die durch Radius- und Ulnaschaft miteinander gekoppelt sind. Störungen der Unterarmdrehbewegung stellen für die betroffenen Patienten eine erhebliche Funktionseinschränkung dar. (), "CHAPTER 20 - Analysis of Splints", Hand and Upper Extremity Splinting (Third Edition), Saint Louis: Mosby, pp. 539–574, doi: 10.1016/b978-080167522-5.Buy Article Permissions and Reprints Zusammenfassung ^ a b Fess, Elaine Ewing Gettle, Karan S.Lee (eds.), "CHAPTER 28 - Ulnar Head and Styloid Fractures", Fractures and Injuries of the Distal Radius and Carpus, Philadelphia: W.B. This article incorporates text in the public domain from page 218 of the 20th edition of Gray's Anatomy (1918)
This is important in preventing pressure ischaemia. The position of the styloid process of the ulna in relation to the wrist must be considered when applying a wrist splint. Conservative management involves injection of triamcinolone, while surgery involves shortening of the styloid process of the ulna via resection. When the DRUJ is unstable, the ulnar styloid may require independent treatment.Īn excessively long styloid process of the ulna can cause painful contact with the triquetral bone in the wrist, known as ulnar styloid impaction syndrome. The major exception is when the joint between these bones, the distal radioulnar joint (or DRUJ), is unstable. Clinical significance įractures of the styloid process of the ulna seldom require treatment when they occur in association with a distal radius fracture. The radioulnar ligaments also attaches to the base of the styloid process of the ulna. The rounded end of the styloid process of the ulna connects to the ulnar collateral ligament of the wrist. The styloid process of the ulnar varies in length between 2 mm and 6 mm. The head is separated from the styloid process by a depression for the attachment of the apex of the triangular articular disk, and behind, by a shallow groove for the tendon of the extensor carpi ulnaris muscle. It descends a little lower than the head. The styloid process of the ulna projects from the medial and back part of the ulna. The styloid process of the ulna is a bony prominence found at distal end of the ulna in the forearm.
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