What is the common fracture located on the base of the first metacarpal called?

• A. Colles fracture
• B. Bennett fracture
• C. Smith fracture
• D. Boxer fracture

Answer: (B)

The injury at the base of the first metacarpal, known as a Bennett fracture, occurs due to axial loading and the resulting impact compresses the metacarpal bone. This type of fracture is characterized by a fracture of the articular surface that may also lead to joint instability, particularly affecting the carpometacarpal joint of the thumb.

Understanding the significance of this fracture is essential, as it not only affects hand function but can also lead to complications such as arthritis or malunion if not treated appropriately. The unique location and mechanics of a Bennett fracture set it apart from other types of fractures like the Colles fracture, which typically occurs in the distal radius, the Smith fracture, which is a reverse Colles fracture, and the Boxer fracture, commonly associated with the fifth metacarpal due to a punch. Each of these fractures affects different bones and areas, emphasizing the importance of accurately identifying the type of fracture for proper management and treatment.