Coupling assembly, particularly for dental implants

摘要

A coupling assembly, particularly for dental implants, having at least one pin, which can be coupled rigidly to a bone portion, and a supporting element, which can be associated with a prosthesis. The pin has, at its end portion that lies opposite the one designed for connection to the bone portion, a protruding tab that can be accommodated by elastic forcing in a respective cavity formed in the supporting element so as to produce a stable coupling configuration between the pin and the supporting element. The tab is shaped like a substantially equatorial portion of a sphere with an outer lateral surface adapted to abut, with at least one part thereof, against the internal side wall of the cavity, to determine stable coupling configuration.

主权项

1. A coupling assembly for dental implants, comprising:
at least one pin, which is rigidly coupleable to a bone portion of a patient; a supporting element that has a cavity formed therein which has an internal wall; and a substantially cylindrical sleeve, wherein said supporting element is constituted by a ring that is positioned on the pin, and said substantially cylindrical sleeve has an inside duct, said inside duct having an inwardly extending bottom shoulder that is secured between said ring and a surface of the pin for providing reference and support for additional prosthetic components, and said inside duct extending from said bottom shoulder to a top edge thereof in a direction away from said pin in an assembled configuration of the coupling assembly, and wherein said pin has at a first end portion thereof that lies opposite a second one designed for connection to the bone portion, a protruding tab, that is accommodatable by elastic forcing in said cavity formed in said ring for stable coupling between said pin and said supporting element, and wherein said tab has a shape of a disc with an outer lateral surface that is constituted by a fragment of a spherical surface which comprises a great circle of a sphere and forms a curvature with a portion that tapers towards said pin, said internal wall of said cavity of the ring having a flared portion that is complementary to said tapering portion of the curvature of the outer lateral surface of said tab, said outer lateral surface being adapted to abut, with at least a part of said tapering thereof, against said internal wall of said cavity, so as to determine the stable coupling configuration, the coupling assembly further comprising a locking screw that is screwable into a female thread formed in said tab, and wherein in said assembled configuration of the coupling assembly said bottom shoulder of said sleeve is locked between said surface of said pin and said ring, and said ring is locked between said bottom shoulder of said sleeve and said locking screw that is screwed into said female thread formed in said tab.