Bony projection from the olecranon process of ulna

Complex elbow instability.

Complex elbow instability consists of dislocation of the ulnohumeral joint with a concomitant fracture of one or several of the bony stabilizers of the elbow, including the radial head, proximal ulna, coronoid process, or distal humerus. Recurrent instability is not often associated with simple dislocation, but an improperly managed complex dislocation may be a prelude to chronic, recurrent elb...

Rheumatoid Nodules Rheumatoid nodules are deeply seated firm masses that occur in patients with rheumatoid arthritis, particularly over extensor prominences, such as the proximal ulna, the olecranon process, and the metacarpophalangeal and proximal interphalangeal joints

Biomechanical Testing of an Olecranon Osteotomy Nail

INTRODUCTION Comminuted distal humerus fractures often require large access to the distal humerus for anatomic reconstruction of the joint surface. In these cases an olecranon osteotomy is usually performed, allowing the triceps muscle to be moved out of the way with clear access to the distal humerus. After fixing the distal humerus, the olecranon is often fixed with two k-wires inserted longi...

Methods of Fixation of Olecranon Fractures

This study was designed to compare the rigidity of the more commonly used techniques of internal fIxation of fractures of the olecranon. Cadaveric elbow joints were mounted in a jig and confrolled osteotomies performed to simulate transverse, oblique or comminuted fractures. Five techniques of internal fixation were tested by measuring movement at the fracture site after applying a bending mome...

Management of fractures of the proximal ulna.

Proximal ulna fractures can be difficult to manage because of the elbow's complex anatomy. Advances in understanding elbow anatomy and biomechanics, however, have led to new insights. Careful preoperative evaluation is critical because failure to restore normal anatomy of the proximal ulna could have a detrimental effect on postoperative elbow function. Management options include anatomic plate...