Anatomy of the Elbow

Late posterior interosseous nerve palsy associated with loosening of radial head implant

“…The ideal position for this implant should recreate the normal anatomy of the radial neck, which differs approximately 15 from the shaft of the radius. 11 This relationship can be difficult to recreate in the case of trauma and previous deformity. This may have contributed to early loosening.…”

Isolated, Traumatic Anterior Dislocation of the Radial Head In An Adult

“…The annular ligament is part of the lateral ligament complex of the elbow, which consists of annular ligament, radial collateral ligament and the lateral ulnar collateral ligament. The annular ligament stabilizes the proximal radioulnar joint by wrapping around the radial head and attaching to the anterior and posterior margins of the lesser sigmoid notch of the ulna [7]. The annular ligament is the most important reinforcing structure of this joint [8].…”

Elbow: The Trochleogingylomoid Joint

“…The elbow is composed of three articulations. [1][2][3][4][5][6][7][8][9] The humeroulnar and humeroradial articulations provide the hinged (ginglymoid) joint motion of flexion and extension, and the proximal radioulnar (trochoid) joint permits pivotal motion (supination-pronation). Combined these articulations create a trochleoginglymoid joint.…”

“…2). 1,3,[9][10][11] The trochlea and capitellum are cartilage covered in arcs of approximately 330 and 180 degrees, respectively.…”

“…Proximal to the trochlea's articular surface, the coronoid fossa provides room for the ulna's coronoid process during flexion. 4,[6][7][8][9] The cubital tunnel is a sulcus on the posterior distal humerus that holds the ulnar nerve. Also posteriorly is the large olecranon fossa, which accepts the olecranon during elbow extension.…”