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18 Νοε 2022 · The typical clinical manifestation is ulnar-sided wrist pain exacerbated by load bearing and forearm supination as a consequence of the ulnar head moving volar to and impinging on the sigmoid notch. Joint space narrowing, osteophytes, and subchondral bone cysts are the typical radiographic findings but are usually present in advanced disease ...
3 Νοε 2023 · The distal radioulnar joint is the articulation between the crescent-shaped convex distal head of ulna and the concave ulnar notch of radius. Both surfaces are lined by the hyaline cartilage. The joint contains a triangular fibrocartilaginous articular disc.
14 Απρ 2024 · articulation occurs between the ulnar head and sigmoid notch (a shallow concavity found along ulnar border of distal radius)
11 Αυγ 2024 · The sigmoid notch of the distal radius is concave and hemicylindrical with three distinct margins: a sharp dorsal margin, a smoother palmar margin, and a distal margin, which is the junction between the lunate facet and the sigmoid notch (Fig. 43.1). The opposed ulnar head is also hemicylindrical but has a smaller radius of
In addition to isolated acute injuries of the DRUJ, distal radial fractures, ulnar styloid base fractures, sigmoid notch and ulnar corner fractures, Galeazzi fractures, and Essex-Lopresti injuries were found to have a potential association with DRUJ injuries.
21 Απρ 2019 · Incongruency of the sigmoid notch articular surface will lead to painful degeneration, with radiocarpal arthrosis resulting in pain with wrist flexion and extension. Earlier studies indicated that as much as 2 mm of stepoff in the distal radial articular surface could be accepted with good outcomes.
The articulating surfaces are the radial sigmoid notch and ulnar head, while the ulnar fovea serves as a critical attachment site for multiple capsuloligamentous structures. The DRUJ is an inherently unstable joint, relying heavily on intrinsic and extrinsic soft-tissue stabilizers.
