Proximal radius and ulna constitute are important parts of the elbow, including radial fracture, ulna coronoid fractures, olecranon fractures and a variety of complex fractures.
1. Radial fractures
Radial head fracture is due to the radial head and capitellum collision. The vast majority are due to falling. Mason common type: type A is radial or neck fracture, none or tiny displacement.
2. Ulna coronoid fractures
Most coronoid fractures are due to elbow extension bits fall, posterolateral rotatory instability or varus after the occurrence. It is often accompanied by elbow ligament injury, leading to instability of the elbow. Fractures were classified according to the size of the block:
Type A: Avulsion coronoid tip.
Type B: Alone or comminuted factures.
Type C: More than 50% of the coronoid factures.
Olecranon fracture is spread to within a half notch articular fractures. Type:
Type A: No shift.
Type B: stable Shift.
Type C: unstable Shift.
4. Complex elbow fracture-dislocation
(1) Elbow injury "triad" of elbow dislocation occurs (ligament injury) combined radial and ulna coronoid bone fracture, which is called elbow injury "triad".
(2) After olecranon fracture dislocation occurs in moderate elbow flexion, dorsal forearm suffered violent direct action with high energy.
(3) The fracture dislocation often occurs in the elderly when wrestling.