Which deformity characterizes a Colles' fracture?

A Colles' fracture is characterized by the "dinner fork deformity." This specific fracture occurs at the distal radius in the forearm and commonly results from a fall onto an outstretched hand. The typical presentation includes dorsal angulation and dorsal displacement of the distal fragment of the radius, which gives the wrist a distinctive appearance reminiscent of a dinner fork when viewed from the side.

This deformity arises due to the mechanism of injury and the anatomical characteristics of the fracture, making it easily recognizable in clinical practice. Understanding the appearance of the dinner fork deformity helps healthcare professionals quickly identify the nature of the injury, leading to appropriate management and treatment.

The other terms, like "garden spade deformity" or "Smith's fracture deformity," refer to different types of wrist fractures or deformities and would not accurately describe the classic presentation of a Colles' fracture.