ARRANGEMENT FOR USE IN A SYSTEM WITH A RANGE OF DENTAL SCREWS, AND THE RANGE OF DENTAL SCREWS

摘要

In a system with a range of dental screws (2), the screws are tightened by means of one and the same screw tightener (1). The screws are of different types and have different constructions. Each screw has an internal recess (4) via which the cooperation with the screw tightener is afforded. Each recess has elements extending inwards towards the centre axis of the screw, and the screw tightener has parts which can cooperate with the elements. The bearing capacity function is effected by the conicity of the said parts, while the driving function between tightener and screw is effected by means of axially extending elements and parts. The driving and the bearing capacity are in this case mechanically separated. The invention may also be seen as a range of dental screws.