| 摘要 |
The screw comprises a bore for engagement with a complementary driver, the bore having a plurality, preferably six, recesses 350 arranged circumferentially around the inside of the bore. Both the walls of the bore and the recesses may be tapered towards the distal end of the screw (fig 3A). Also disclosed is a driver (400, figs 4A-C) with a head having edges (410) which in different sections from the distal end describe a circular curve (470), a straight line (460), a further circular curve (450) and a further straight line (440) until the surfaces of the head meet the shaft of the tool (430). The driver is used for driving the screw into a dental implant at an angle from the longitudinal axis of the implant (fig 2B), the screw having a polygonal interface and the screw driver a matching interface for driving the screw to rotate.
|
