Abstract
Purpose: We aimed to determine whether the presence of the distal oblique bundle (DOB) can be evaluated in magnetic resonance imaging (MRI) examinations. Methods: We retrospectively reviewed 468 wrist and forearm MRIs taken in patients without acute fractures, infections, or tumors, and selected 80 MRIs that provided adequate coverage of the distal interosseous membrane (DIOM). We measured the thickness of the DIOM in the T2- weighted transverse plane. We used a picture archiving and communicating system and a model-based clustering method to determine whether some individuals have thicker DIOMs that can be considered as the DOB. Results: The thickness of the DIOM demonstrated a bimodal distribution, indicating the presence of patients with a thick DIOM (DOB). The model-based clustering method indicated that the optimal cutoff point was 1.0 mm. Twenty-six individuals (32.5%) had thick DIOMs with a mean thickness of 1.4 mm (SD, 0.2 mm), whereas 54 individuals (67.5%) had thin DIOMs with a mean thickness of 0.6 mm (SD, 0.2 mm). Conclusions: This study demonstrates that MRI can identify the presence of the DOB. The incidence and thickness of the DOB in this study support the findings of previous cadaveric studies on its morphology.
Highlights
Fractures of the radius distal to the watershed line show a significant risk factor for secondary dislocation especially when the lunate fossa is involved
Depending on the size of the fragments, which is best analyzed by computed tomographic (CT) scan, decision making for fixation technique is done
We analyzed the patients with ulnar styloid fracture accompanied by distal radius fracture using simple radiograph and 3D computed tomography (3D CT) scan images, respectively, and compared accuracy of evaluation for the types of ulnar styloid fractures, which might designate the treatment methods
Summary
Fractures of the radius distal to the watershed line show a significant risk factor for secondary dislocation especially when the lunate fossa is involved. We analyzed the patients with ulnar styloid fracture accompanied by distal radius fracture using simple radiograph and 3D computed tomography (3D CT) scan images, respectively, and compared accuracy of evaluation for the types of ulnar styloid fractures, which might designate the treatment methods. Materials and Methods: We retrospectively reviewed 168 patients who underwent surgery for distal radius fracture in our hospital from January 2005 to March 2015, and evaluated whether ulnar styloid base was involved using simple radiographs and 3D CT scan images. Results: On simple radiographs, 64 patients (38%) had ulnar styloid base fractures; 21 cases of these revealed nonbase fractures by 3D CT scan images. Based on the findings of 3D CT scan images, the accuracy of simple radiographic evaluation for types of ulnar styloid fractures was 83%, with 86% sensitivity and 82% specificity.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
