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Metacarpal Fractures are the most common hand injury and are divided into fractures of the head, neck, or shaft. Diagnosis is made by orthogonal radiographs the hand. Treatment is based on which metacarpal is involved, location of the fracture, and the rotation/angulation of the injury.
Fourth metacarpal: The bone that connects your wrist to your ring finger. Fifth metacarpal: The bone that connects your wrist to your pinkie finger. How is a metacarpal fracture classified?
The most common fracture site in the metacarpal is the shaft, and those with oblique and spiral fracture types have a higher likelihood of rotational deformity, requiring operative fixation. Primary options for fixation of these injuries include intramedullary K-wires, plate and screws, and, more recently, headless intramedullary compression ...
The metacarpal shaft fractures are often produced by longitudinal compression, torsion, or direct impact. They are described by the appearance of their respective fracture patterns and can be divided by transverse, oblique, spiral, and comminuted.
Definition: Fracture of a metacarpal bone, through the head, neck, shaft, or base. Mechanism. Varies based on location of fracture. Neck fractures. Most common fracture pattern. Often result from a direct axial force, such as a punch, hence the term “boxer’s fracture”. Shaft fractures.
A fractured (broken) metacarpal is a common injury of the hand. A metacarpal fracture affects one or more of the five metacarpal bones that run from the wrist (carpal) bones to the knuckles. An impact injury, such as a fall or blow to the hand, is usually the cause of a metacarpal fracture.
Fractures of the second, third, fourth, and fifth metacarpals are subdivided into those affecting the metacarpal head, neck, shaft, or base. Due to the unique biomechanics and anatomy of the thumb, fractures of the first metacarpal are classified separately.
Metacarpal shaft fractures can result from axial loading, torsion, or a direct blow, and typically present as transverse fractures, oblique fractures, or comminuted fractures.
Metacarpal shaft fractures occur in three basic patterns: transverse, oblique, and comminuted. Transverse fractures are caused by a direct blow. These fractures are typically pulled into apex dorsal angulation by the forces of the interosseous muscles (figure 4 and figure 5 and figure 6) and extrinsic flexor tendons exerted on the metacarpal shaft.
Figure 1 A 20-year-old male presented 10 days following fourth and fifth metacarpal shaft fractures with volar angulation and displacement (upper panel). He was treated with intramedullary screw fixation and demonstrated osseous union with anatomic alignment at 3 months after surgery (lower panel). ... Fixation of metacarpal shaft fractures ...