Complex sentence: A Colles'fracture is a fracture of the distal radius, most commonly caused by people falling forward onto a hard surface and breaking their fall with extended, outstretched hands-falling with wrists flexed would lead to a Smith's fracture.
Split into simpler sentences: A Colles'fracture is a fracture of the distal radius. It is most commonly caused by people falling forward onto a hard surface and breaking their fall with extended, outstretched hands-falling with wrists flexed would lead to a Smith's fracture.