The Monteggia fracture is a fracture of the ulna, which affects the relationship with the department. Fracture Monteggia frequently associated with dislocation of the radial head. More common in children. Due to blow on the forearm. Monteggia fracture-dislocations are classified by the system Bado. Bado monteggia classified four types of injuries and said radial head broke up the angulation of the ulna. Type I is characterized by ulnar fracture with proximal anterior dislocation of the radial head. Mechanism of injury is described as a direct trauma to the posterior part ulna, or fall on an outstretched arm.

Another mechanism described is falling on an outstretched arm with the hyperextended elbow. This pattern is more common. Type II injuries are "reversed" Monteggia fracture-dislocation injuries. The fractured ulna tree is after the apex. This lesion is thought to be caused by a force rotation in supination or direct trauma of the forearm in supination position. This pattern is rare in children and is often a compound fracture. Type III monteggia lesion side or antero-lateral dislocation of the head with radial fracture of the ulnar metaphysis. This pattern is unusual, and all cases were reported among children.

The mechanism of injury can be a direct trauma on the inner aspect of the elbow with or without rotation force. This causes an adduction force moving radial head forward. Pronation and supination forces added lead-lateral posterior or anterior-lateral dislocation. Type IV monteggia lesions anterior dislocation of the head with a radial fracture of the proximal radius. The ulna has a pre-summit before the break. Treatment of a Monteggia fracture is with surgery to repair the ulna fracture. Intravenous antibiotics should be administered to patients with open fractures. Ketamine is a very useful drug for sedation.