Fig. 3

Surgical procedure and custom made devices used for preparation of a diaphyseal drill hole defect (a-g). a Positioning of the k-wire. b The cannulated headed reamer is used to drill the 6 mm unicortical hole. c The custom-made drilling template is used to position the second 1.5 mm drill hole for the 2 mm screw in a distance of exactly 2 cm adjacent to the defect. d With the screw holder the self-tapping screw was inserted. e The hole was cleaned of any periosteum and flushed with saline solution. f-g The cruciform slots in the screw head and the marks on the harvesting template were aligned for easy sample harvesting at the time of necropsy