A buckle fracture of the distal radius is also known as which type of fracture?

• A. Torus fracture
• B. Colles fracture
• C. Smith fracture
• D. Monteggia fracture

Answer: (A)

A buckle fracture of the distal radius is a torus fracture, which is an incomplete compression injury common in children. Instead of a full break, the cortex buckles inward from the bending force, so the x-ray shows a bulge or buckling of the cortex without a discrete fracture line. This distinguishing feature sets it apart from Colles or Smith fractures, which are complete distal radius fractures with dorsal or volar angulation, and from Monteggia fractures, which involve a ulna fracture with dislocation of the radial head. Treatment is immobilization in a cast or splint, with healing typically over a few weeks and minimal risk of displacement.