Humeroulnar arthrodesis and pseudoarthrosis surgery for distal 1/3 humeral defect were planned approximately 45 days after the third operation.
Wevers, "Geometry of the
humeroulnar joint," Journal of Orthopaedic Research, vol.
Preoperative carrying angle has been measured on anteroposterior radiograph using
humeroulnar angle (it is the line drawn along long axis of humerus and ulna).
It arises by two heads, a
humeroulnar head and a radial head.
The bone fragment was displaced laterally by the traction of the flexor muscles; however, dislocation of the
humeroulnar joint was not observed (Figure 1).
La articulacion cubital es de tipo sinovial compuesta, formada por las articulaciones
humeroulnar, humeroradial y radioulnar proximal (Budras, 2007; Adams, 2004; Sandoval, 1998).
Per operative reduction was checked by assessing
humeroulnar angle and range of motion.
Any form of hypermobility of the ulnar nerve requires a careful differential diagnosis in order to distinguish between dysplasia of the retrocondylar ulnar groove, snapping triceps syndrome, arcade of Struther, muscular anomalies at the medial elbow, distal humerus changes after trauma, and ulnar nerve compression by the
humeroulnar apponeurotic arcade joining 2 heads of the flexor carpi ulnaris muscle.
Segment Proximal boundary Distal boundary Upper Arm Glenohumeral Joint
Humeroulnar Joint Forearm
Humeroulnar Joint Ulnocarpal Joint Hand Ulnocarpal Joint Distal Phalanges Thigh Shank Femoral Head Tibiofemoral Joint Tibiofemoral Joint Talocrural Joint Foot Talocrural Joint Distal Phalanges Segment Basic description (a) Upper Arm Commences between the head of the Humerus and glenoid fossa of the Scapula, separating the upper arm from the trunk; Ending at the elbow axis, noted by the trochlea of the Humerus and olecranon process of the Ulna.
The radiographic assessment was carried out after the sixth month by investigating the
humeroulnar angle and Baumann angle in AP view and, humerocapitellar angle in LAT view (Fig.2).
The elbow joint is opened anteriorly, and the capsule released circumferentially; the
humeroulnar and radiohumeral joints are then disarticulated.
It is thought that UNE mostly develops in the
humeroulnar arcade (HUA) and/or retroepicondylar groove (RTC) (8,10-12).
