Related Experiment Video
Updated: Mar 28, 2026

Development of a Novel Internal Fixation Model for Rat Radial Fractures: Fracture Healing Assessment and Dorsal Root Ganglion Isolation
Published on: March 13, 2026
Bidirectional Dislocation of the Distal Radioulnar Joint After Distal Radius Fracture: Case Report
Sayuri Arimitsu1, Hisao Moritomo2
1Department of Orthopaedic Surgery, Yukioka Hospital, Kita-ku, Osaka-shi Osaka, Japan.
Abstract:
We report a patient with bidirectional dislocation of the distal radioulnar joint after malunited distal radius fracture, in which the ulnar head dislocated dorsally during forearm pronation and palmarly during supination without manual compression of the ulnar head. The patient had chronic ulnar wrist pain and experienced a painful clunk during forearm rotation. The distal radioulnar joint ballottement test was positive in both the dorsal and palmar directions. Her distal radius was malunited with a 20° dorsal angulation and 18° pronation deformity. A corrective osteotomy of the radius with open repair of the triangular fibrocartilage complex foveal avulsion yielded success. At the 7-year follow-up, there was almost a normal range of wrist and forearm motion, 83% grip strength, no arthritis, and a stable distal radioulnar joint.
More Related Videos
Related Concept Videos
Bones of the Upper Limb: Radius
The radius has a nail-shaped head, and a...
Bones of the Upper Limb: Ulna
Bones of the Upper Limb: Humerus
Fractures: Bone Repair
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...

