A Colles fracture most directly involves which bone?

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Multiple Choice

A Colles fracture most directly involves which bone?

Explanation:
A Colles fracture is a break at the distal radius near the wrist, usually after a fall on an outstretched hand. The force travels up the forearm and the distal radius fractures with the fragment tilting backward (dorsal tilt), producing the classic dinner-fork deformity. Because the wrist joint is formed mainly with the distal radius and the carpal bones, this injury most directly involves the radius. The ulna is nearby but not the primary bone fractured in this specific pattern. The tibia and fibula are leg bones, so they aren’t involved in this wrist injury.

A Colles fracture is a break at the distal radius near the wrist, usually after a fall on an outstretched hand. The force travels up the forearm and the distal radius fractures with the fragment tilting backward (dorsal tilt), producing the classic dinner-fork deformity. Because the wrist joint is formed mainly with the distal radius and the carpal bones, this injury most directly involves the radius. The ulna is nearby but not the primary bone fractured in this specific pattern. The tibia and fibula are leg bones, so they aren’t involved in this wrist injury.

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