Patent ID: 9308061
Filing Date: 2016-04-12
CPC Classification: A61C

Claim Text:
1. A dental implant comprising a post part which can be placed in a jaw bone, and a structural part associated with said post part, to which structural part a denture piece can be attached, the structural part comprising an integrally moulded contact pin which can be placed in an associated shaped recess in the post part with a positive fit, wherein the cross-section of the contact pin integrally moulded on the structural part and the cross-section of the shaped recess in the post part have at least one primary direction in which the radius of the cross-section adopts a relative maximum value R0, and at least one secondary direction in which the radius of the cross-section adopts a relative minimum value, wherein the outer contours of the cross-sections of the contact pin and the shaped recess are selected in such a way that they have precisely one tangent at each point, and wherein both the contact pin of the structural part and the shaped recess in the post part are tapered, wherein the structural part when placed in the post part has a lift height ΔH, as a function of a taper angle β and the minimum radius r of said at least one secondary direction, as follows:  and wherein the lift height ΔH, as a function of a rotational offset from a rotation between the structural part and the post part from a starting position in which said at least one primary direction of the contact pin is rotationally aligned with said at least one primary direction of said shaped recess to an end position in which said at least one primary direction of said contact pin is rotationally aligned with said at least one secondary direction of said recess, is at least 900 μm/n, where n is the number of primary directions of the structural part in the post part, and wherein the lift height prevents outer threads of a connecting screw inserted in the structural part from engaging inner threads of the post part until the rotational offset of the contact pin and shaped recess is such that a force applied by the connecting screw on the structural part begins to self-center the structural part in the post part.