Patent ID: 6419489
Filing Date: 2002-07-16
Classification: A61C

Abstract:
Arrangement used in a system with a range of dental screws for tightening screws of different types comprising a screw tightener and screws having an internal recess which cooperates with the screw tightener, each of said recesses having elements extending inwards towards the center axis of each screw, the screw tightener having at an end which cooperates with the screws, parts which cooperate with the elements during screw tightening, the elements in each recess extend, in the longitudinal direction of the recess, substantially parallel to the longitudinal axis of the screw, the screw tightener having a circular cross-section, at the outsides of the parts, widens slightly conically from said end, at the same time as the surfaces of the parts bearing against the elements are essentially parallel to corresponding surfaces of the elements.