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US4846683: Axially short dental implant fixture

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Filing Information

Inventor(s) Richard J. Lazzara · Keith D. Beaty ·
Assignee(s) Implant Innovations, Inc. ·
Attorney/Agent(s) Alfred H. Rosen ·
Primary Examiner John J. Wilson ·
Application Number US7210331
Filing date 06/23/1988
Issue date 07/11/1989
Predicted expiration date 06/23/2008
U.S. Classifications 433/173  · 433/174  ·
International Classifications A61C 800  ·
Kind CodeA
International Classifications 433173;174;175;176 ·
8 Claims, No Drawings


Abstract

A dental implant fixture for use in a shallow bore in a jawbone has a flange around its gingival end which overlies the jawbone around the bore when the fixture is installed in the bore. The bore is countersunk to receive the flange, preferably deeper than the thickness of the flange to encourage growth of bone over the flange. Pressure on the fixture is taken up by the flange.

Independent Claims | See all claims (8)

  1. 1. In combination, a dental implant fixture having an elongated substantially cylindrical implantation body having a first diameter for implantation in a bore having a similar diameter made in the jawbone of a patient to receive said implant fixture, said implant fixture when so implanted having a gingival end located in the opening into said bore, an annular flange on said body extending therefrom laterally around said gingival end to a second larger diameter for overlying the surface of said jawbone around said opening when said fixture is so implanted, a receiving bore in said implantation body opening centrally through said flange, prosthodontic restoration component means having a bearing surface for contacting said implant fixture at said gingival end, means for engaging in said receiving bore to join said restoration component means to said implant fixture, said implant fixture having an annular boss extending supragingivally from said flange around said receiving bore opening concentric with and having an outer diameter which is the same as said first diameter of said implantation body, said bearing surface having similar annular size and shape so as to apply directly to said boss and only indirectly to said flange via said boss the compression forces which during use will be imposed on said implant fixture.
  2. 6. A dental implant fixture having an elongated substantially cylindrical implantation body for implantation in a bore made in the jawbone of a patient to receive said implant, said implant fixture when so implanted having a gingival end located in the opening into said bore, an annular flange on said body extending therefrom laterally around said gingival end for overlying the surface of said jawbone around said opening when said fixture is so implanted, and a round boss having substantially the same diameter as said implantation body extending supragingivally from said flange coaxial with said body.
  3. 8.8. In combination, a dental implant fixture having an elongated substantially cylindrical implantation body of a first diameter for implantation in a bore having a similar diameter made in the jawbone of a patient to receive said implant fixture, said implant fixture when so implanted having a gingival end located in the opening into said bore, an annular flange on said body extending therefrom laterally around said gingival end to a second larger diameter for overlying the surface of said jawbone around said opening when said fixture is so implanted, and an annular boss extending supragingivally from said flange, said boss having substantially the same outer diameter as and being concentric with said implantation body, a receiving bore in said implantation body opening centrally through said boss, and prosthodontic restoration component means which is tubular in shape having at one end a first transverse annular surface providing a bearing surface for contacting said implant fixture at said gingival end, means for engaging in said receiving bore to join said restoration component to said implant fixture, the outer diameter of said bearing surface being substantially the same as said second larger diameter of said flange and the inner diameter of said bearing surface being substantially the same as said first diameter of said implantation body, and extending axially inward from said bearing surface a circular recess dimensioned loosely to envelop said boss.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US4552532 MOZSARY PETER G Mozsary Nov 1985
US4575340 Lustig Mar 1986
US4713003 University of Toronto Innovations Foundation Symington et al. Dec 1987
US4713004 Vent Plant Corporation Linkow et al. Dec 1987

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