- Figure 1: Waist of scaphoid fracture (blue arrow) appear minimally displaced on this view, and is associated with only marginal widening of the scapholunate interval (yellow arrow).
- Figure 2: Outline of the scaphoid on lateral projection (orange) is abnormal with an apparent humpback deformity (red arrow).
- Figure 3: CT confirms rotation of the proximal and distal poles, resulting in a humpback deformity (red).
- Figure 4: Dynamic cannulated compression screws work by having the thread wider apart at one end (orange) compared to the other end of the screw (yellow) In scaphoid fractures the screw is passed through the distal pole and then the proximal pole. As a result, the part engaged by the widely space thread (proximal pole) is moved along the screw a greater distance by each turn than the more distal pole; this has the net effect of compressing the fracture ends together.