Fig. 1

Bone screw and surgical procedure. A Example of the cortical bone screw. B The Shark Screw® "cut" is screwed in, without much resistance, with a hexagonal screwdriver. C The skin incision was pulled proximally with a narrow-wound hook and, at the same time, the wrist was bent so that the protruding material of the cortical bone screw could be sawn off just above the bone surface in a subsequent step