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US 4,955,811 AGranted
Non-rotational single-tooth prosthodontic restoration
AssigneeImplant Innovations, Inc.
InventorsRichard J. Lazzara, Keith D. Beaty
Life of this patent
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AssigneeImplant Innovations, Inc.
InventorsRichard J. Lazzara, Keith D. Beaty
Estimating the term…
A method and a system for preparing a single-tooth prosthodontic restoration for non-rotational fixation to a dental implant fixture of the kind having a threaded socket together with anti-rotation means to restrain components non-rotationally attached to the fixture. The system provides a set of attachments comprising a two part impression coping having anti-rotation means cooperative with the anti-rotation means of the fixture and index means to fix the coping against rotation when encased in resilient impression material, a laboratory analog having a replica of the anti-rotation means of the fixture and core means on which to fabricate the restoration, the core means having a replica of the anti-rotation means of the impression coping. The method of using the system prepares a single-tooth restoration for fixation on an implanted fixture non-rotationally and with the desired orientation around its axis, so that no stabilizing connection to an adjacent tooth is required.
A set of attachments for use in fabricating a prosthodontic restoration intended to be fitted non-rotationally on a dental implant fixture having a threaded bore axially disposed in it and opening centrally through its gingival end, said fixture having at said gingival end anti-rotation means to fix said restoration when fitted against rotation relative to said fixture around a longitudinal axis running successively through said bore and said restoration, said set of attachments comprising an elongated impression coping having at a first one of its ends anti-rotation means cooperative with said anti-rotation means of said fixture upon attaching said coping end-wise to said gingival end of said fixture so as to fix said coping against rotation around said axis relative to said fixture, said coping having a smooth bore extending through it from said first one of its ends to the second one of its ends concentric with and embracing said axis for passage of a bolt useful to attach said coping to said fixture via said threaded bore, said coping having index means to fix said coping against rotation around said axis when encased in resilient impression material, a laboratory analog of said fixture having at one end a replica of said anti-rotation means of said fixture and a body extending from said one end including means to fix said analog in a rigid dental model, and core means on which to fabricate said restoration, said core means having at one end a replica of said anti-rotation means of said impression coping, and extending between its ends a bore for passage of a bolt useful to attach said core means to said fixture via said threaded bore.
A method of fabricating a prosthodontic restoration to be fitted non-rotationally on a dental implant fixture having a threaded bore axially disposed in and opening centrally through its gingival end, and having at its gingival end anti-rotation means to fix a prosthodontic restoration against rotation relative to said fixture around a longitudinal axis running successively through said bore and said restoration, said method comprising the steps of fitting non-rotationally to said fixture an impression coping having mating anti-rotative means and index means to fix said coping against rotation around said axis when encased in resilient impression material, forming an impression of said coping in said impression material, removing said coping from said impression and separating said coping from said fixture, fitting non-rotationally to said coping a laboratory analog having at one end a replica of said anti-rotation means of said fixture, reinstalling said coping in said impression with said analog fitted to it and forming a stone model around said analog, again removing said coping from said impression and separating said coping from said analog, non-rotatively attaching to said analog core means having a replica of said anti-rotative means of said impression coping on which to fabricate said restoration, fabricating said restoration on said core means, preserving said last-named anti-rotative means, and installing said restoration on said fixture mated with said non-rotative means of said fixture.
An intermediate component for use in fabricating a prosthodontic restoration intended to be fitted non-rotationally on a dental implant fixture having a threaded bore axially disposed in it and opening centrally through its gingival end, said fixture having at said gingival end anti-rotation means to fix said restoration when fitted against rotation relative to said fixture around a longitudinal axis running successively through said bore and said restoration, said component comprising an elongated impression coping having at a first one of its ends anti-rotation means cooperative with said anti-rotation means of said fixture upon attaching said coping end-wise to said gingival end of said fixture so as to fix said coping against rotation around said axis relative to said fixture, said coping having a smooth bore extending through it between said one end and a second end concentric with and embracing said axis, for passage of a bolt useful to attach said coping to said fixture via said threaded bore, said coping having index means to fix said coping against rotation around said axis when encased in resilient impression material.
Dependencies are inferred from the claim text.