UT and UL ligaments originated from the volar side of the volar distal radioulnar ligament, while ulnocapitate ligament had a direct bony origin from the fovea of the ulnar head
and located more superficial to the junction between the UL and UT ligaments.
We aimed to report the incidence and types of distal ulnar head
and neck fractures associated with distal radius fractures and compare outcomes in operatively versus non-operatively treated patients.
In the typical course, the ulnar artery crosses deep to the median nerve and is separated from it by the ulnar head
of the pronator teres muscle.
INTRODUCTION: Ulnar artery is the larger terminal branch of brachial artery in the cubital fossa (1) It passes downwards, medially and leaves the cubital fossa deep to the ulnar head
of pronator teres which separates the artery from the median nerve.
Percutaneous pin fixation was used in cases of stable retention of the ulnar head
after closed reduction, while ORIF was used in patients with unstable fractures of the distal ulna.
MRI showed destruction localised around the ulnar head
with oedematous changes extending up the shaft of the ulna (Figure 3).
Included in the 57 chapters are 13 chapters on the diagnosis and treatment of ulnar-sided wrist pain and instability of the distal radioulnar joint; thorough coverage of the latest advancements in ulnar head
replacement; and the complications, outcome assessments, and salvage procedures for carpal ligament injuries.
The smaller humeral head arises from the medial epicondyle of the humerus and larger ulnar head
has an extensive origin from the medial margin of the olecranon process, proximal two thirds of posterior border of ulna, an aponeurosis which is common for FCU, extensor carpi ulnaris muscle and flexor digitorum profundus muscle and intermuscular septum between it and flexor digitorum superficialis muscle.
The most common compressed locations are struthers arcade, the medial intermuscular septum, medial epicondyle of humerus, the ligament of Osborne of elbow, place between the humeral head of flexor carpi ulnaris muscle and the ulnar head
and deep flexor pronator teres tendon, especially Osborne ligament and the medial epicondyle of the humerus.
Recently, prosthetic replacement of either the ulnar head
or the entire DRUJ has been advocated in order to better restore the kinematics of the joint.
The ulnar head
is semi cylindrical, convex, with a radius of curvature of 10 mm.
3) Biomechanical changes causing excessive loading across the ulnocarpal joint are responsible for a spectrum of pathological changes involving the triangular fibrocartilage complex (TFCC) and articular surfaces of the ulnar head
, lunate, and triquetrum.