• Turk J Med Sci · Jan 2024

    Displaced sigmoid notch fracture and higher patient age are associated with distal radioulnar joint subluxation.

    • Saygın Kamaci, Melih Oral, Engin Türkay Yilmaz, Taha Aksoy, Barış Kafa, and Mazhar Tokgözoğlu.
    • Department of Orthopedics and Traumatology, Faculty of Medicine, Hacettepe University, Ankara, Turkiye.
    • Turk J Med Sci. 2024 Jan 1; 54 (2): 368375368-375.

    Background/AimDistal radius fractures (DRFs) are frequently associated with distal radioulnar joint (DRUJ) instability. The purpose of this study is to evaluate the effect of the sigmoid notch and ulna styloid fracture types on DRUJ subluxation following closed reduction and casting of DRFs via calculating radioulnar ratio (RUR) on postreduction computed tomography (CT) images.Materials And MethodsIn our study, postreduction CT images of 202 patients with distal radius fractures were evaluated retrospectively. CT images were evaluated for RUR, sigmoid notch fracture, and ulna styloid types. Sigmoid notch fractures were classified as nondisplaced in the sigmoid notch fractures (NDS) and displaced sigmoid notch (DS) fractures; ulna styloid fractures were grouped as the proximal half ulna styloid (PHUS) and distal half ulna styloid (DHUS) fractures.ResultsThe mean age of Rozental type 3b (62.8 years) was significantly higher among others. The mean RUR value was significantly higher in Rozental type 3a in compared to type 1a and type 2 fractures. PHUS fractures were more common with DS fractures than DHUS fractures.ConclusionDS fractures and higher patient age are associated with DRUJ subluxation on postreduction CT images following DRFs. DS fractures are seen more commonly with PHUS fractures than DHUS. Patients with PHUS should be carefully assessed for sigmoid notch fractures and DRUJ congruency. These findings could be helpful for preoperative decision making in the treatment of DRFs.© TÜBİTAK.

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