The distal radioulnar articulation is created when the ulnar notch of the radius moves around the articular circumference of the ulna. It provides the movements of supination and pronation. The main stabilizing element of the dital radioulnar joint (DRUJ) is an articular disk called the triangular fibrocatilage complex (TFCC). The TFCC is a fan shaped band of fibrous tissue  that originates on the medial surface of the distal radius and traverses horizontally to insert on the ulnar styloid process. It rotates against the distal surface of the ulnar head during pronation and supination. It seperates the ulna and the carpal bones.