. Modern surgery, general and operative. the most frequent ofwhich is one spHtting off the outer surface of the articular surface of the radiusthrough the base of the styloid process (Ashhursts Surgery, Principles andPractice). Colless fracture is a very common injury, is met with most fre-quently in those beyond the age of forty, and oftener in women than in is due to transmitted force (a fall upon the palm of the pronated hand).Some think that the force is received by the ball of the thumb and passes to thecarpal bones and the edges of the radius; a fracture beginning posteriorly rath
. Modern surgery, general and operative. the most frequent ofwhich is one spHtting off the outer surface of the articular surface of the radiusthrough the base of the styloid process (Ashhursts Surgery, Principles andPractice). Colless fracture is a very common injury, is met with most fre-quently in those beyond the age of forty, and oftener in women than in is due to transmitted force (a fall upon the palm of the pronated hand).Some think that the force is received by the ball of the thumb and passes to thecarpal bones and the edges of the radius; a fracture beginning posteriorly ratherthan anteriorly and the force driving the lower fragment upon the dorsal surfaceof the radius, the carpus and lower fragment moving upward and is much more likely that this fracture is due to cross-strain on the bone. Fractures of the Lower Extremity of the Radius 659 There is sudden traction upon the anterior ligaments, which drag upon the boneand break it at a point where the cancellous end of the radius joins the compact. A B Fig. 380.—CoUess fracture before reduction: A, Anteroposterior; B, lateral views. shaft (Fig. 383). The fragments are not unusually impacted (Fig. 381). Inthe authors experience dislocation of the lower end of the ulna is not a very -^ unusual complication. It arises froma fracture of the ulnar styloid or tear-ing off of the internal lateral ligamentof the wrist.
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