Distally the ulnar head serves as an insertion point for the TFCC, supplementing the DRUJ. Proximally the ulna consists of the olecranon and coronoid. The radiocapitellar joint largely stabilizes the proximal forearm while the TFCC predominantly supports the distal forearm. The interosseous membrane is responsible for dispersing axial load force to the forearm, 60% to the radiocapitellar joint and 40% to the ulnohumeral joint. The radius and ulna are stabilized by three groups of ligamentous structures: distally the triangular fibrocartilage complex (TFCC), the interosseous membrane, and proximally the annular ligament. The osseous forearm is composed of the radius and ulna bones. These risk factors correlate with a bimodal incidence with the highest occurrence in young males (10:10,000) and elderly females (5:10,000). The most noteworthy risk factors for midshaft forearm fractures include sports (football and wrestling), osteoporosis, and being post-menopausal. The peak incidence in children is nine to 12 years. Distal forearm fractures are far more common than midshaft forearm fractures, which occur in about 1 to 10 per 10,000 people per year. One in four radial shaft fractures is a true Galeazzi injuries. Galeazzi fractures account for approximately 7% of all forearm fractures in adults. These fractures occur with a bimodal distribution, diaphyseal forearm fractures in young males are commonly due to high-energy trauma (e.g., sports injuries, falls from height, motor vehicle collisions) and fractures in aging females are due to low-energy traumas such as falls from ground level. The energy from the radius fracture gets transmitted towards the radioulnar joint leading to dislocation of the DRUJ. Galeazzi fractures most commonly result from a fall onto an outstretched hand with an extended wrist and hyperpronated forearm. Galeazzi fractures remain difficult to diagnose clinically, and debilitating complications can occur if proper treatment is not started. Advances in radiography and fracture research have helped define, classify, and guide operative management. The Galeazzi fracture is a fracture of the middle to distal one-third of the radius associated with dislocation or subluxation of the distal radioulnar joint (DRUJ). Sir Astley Cooper first described this particular fracture in 1822, but it was not until 1934 that the eponym took hold when Riccardo Galeazzi presented the mechanism, incidence, and management of this injury. Forearm fractures can lead to significant short-term and long-term disability, mainly if treated incorrectly. It is designed to help maximize versatility by allowing pronation and supination of the hand. The forearm is an essential structure in the human body crucial for completing activities of daily living.
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