Which description characterizes a Spiral Fracture?

Which description characterizes a Spiral Fracture?

• A. A break caused by direct impact perpendicular to the bone
• B. A break that runs along the length of the bone in a straight line
• C. A break caused by rotation around the bone's axis, producing a spiral
• D. A break only at the epiphysis

Answer: (C)

Spiral fractures come from twisting forces around the bone’s long axis, so the fracture line winds around the bone in a helical pattern. This torsional mechanism makes the break span the shaft in a spiral rather than cut straight across. In contrast, a break caused by a direct impact perpendicular to the bone tends to be transverse, cutting straight across. A break that runs along the length of the bone in a straight line describes a longitudinal or straight-line fracture, not spiral. Epiphyseal breaks involve the growth plate near the ends of bones, not a spiral pattern. So the defining idea is twisting around the bone’s axis producing a spiraling fracture line.

Spiral fractures come from twisting forces around the bone’s long axis, so the fracture line winds around the bone in a helical pattern. This torsional mechanism makes the break span the shaft in a spiral rather than cut straight across. In contrast, a break caused by a direct impact perpendicular to the bone tends to be transverse, cutting straight across. A break that runs along the length of the bone in a straight line describes a longitudinal or straight-line fracture, not spiral. Epiphyseal breaks involve the growth plate near the ends of bones, not a spiral pattern. So the defining idea is twisting around the bone’s axis producing a spiraling fracture line.