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US6655961B2 Expired / Lapsed US ⏱️ 0.0 years remaining

Modified dental implant fixture

Assignee: Astra Tech AB
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Filing: 2001-12-03
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Granted: 2003-12-02
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Expires: 2021-12-03
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Abstract

Abstract A modified dental implant fixture designed to preserve lingual bone by having the coronal aspect of the implant being compatible with bony anatomy that is higher on the lingual side of the implant surgical site. The implant may be of either the single stage or the two stage design. By modifying the shape of the top of the implant fixture to mimic healing/healed bony anatomy, bone is preserved and bone growth is possibly encourage.

Inventors

  • 👤 Richard Day Cottrell

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 01:46
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0048; A61C8/005; A61C8/0018; A61C8/0022; A61C8/0025; A61C8/0077; A61C8/0069

Claims Analysis

Total Claims: 45
Claim 1
Independent Claim 88 words
A two-stage dental implant for implanting within a human jawbone, the jawbone having lingual and buccal sides, the implant comprising: a generally cylindrical longitudinal body having an apical end, a coronal end and an outer surface; said body having a length defined between said ends on said outer surface; and said coronal end being contoured such that when positioned within the jawbone, said length is greatest on the generally lingual side and least on the generally buccal side such that said length generally decreases from lingual to buccal.
Claim 2
Dependent Claim 88 words
A two-stage dental implant for implanting within a human jawbone, the jawbone having lingual and buccal sides, the implant comprising: a generally cylindrical longitudinal body having an apical end, a coronal end and an outer surface; said body having a length defined between said ends on said outer surface; and said coronal end being contoured such that when positioned within the jawbone, said length is greatest on the generally lingual side and least on the generally buccal side such that said length generally decreases from lingual to buccal.
Claim 3
Dependent Claim 34 words
A dental implant as defined in claim 1 , wherein said body has a diameter and includes at least one size of grooves around said diameter on at least a portion of said body.
Claim 4
Dependent Claim 21 words
A dental implant as defined in claim 2 , wherein said grooves are parallel with the contour of said coronal end.
Claim 5
Dependent Claim 21 words
A dental implant as defined in claim 2 , wherein said grooves are perpendicular to said length of said implant body.
Claim 6
Dependent Claim 32 words
A dental implant as defined in claim 4 , wherein said grooves on the coronal part of the implant body have multiple leading starting points to allow synchronization with larger apical grooves.
Claim 7
Dependent Claim 19 words
A dental implant as defined in claim 1 , wherein said coronal end is adapted to accept an abutment.
Claim 8
Dependent Claim 23 words
A dental implant as defined in claim 6 , wherein said abutment is contoured to generally follow said contour of said coronal end.
Claim 9
Dependent Claim 20 words
A dental implant as defined in claim 6 , wherein said abutment includes margins adapted to engage an impression cap.
Claim 10
Dependent Claim 18 words
A dental implant as defined in claim 6 , wherein said abutment extends coronally with off axis angulation.
Claim 11
Dependent Claim 14 words
A dental implant as defined in claim 1 , wherein said contour is straight.
Claim 12
Dependent Claim 14 words
A dental implant as defined in claim 1 , wherein said contour is convex.
Claim 13
Dependent Claim 15 words
A dental implant fixture as defined in claim 1 , wherein said contour is textured.
Claim 14
Dependent Claim 24 words
A dental implant as defined in claim 1 , wherein said body is widest at said coronal end and narrows to parallel surfaces apically.
Claim 15
Dependent Claim 89 words
A two-stage dental implant for implanting within the human jawbone, the jawbone having lingual and buccal sides, the implant comprising: a generally cylindrical longitudinal body having an apical end, a coronal end and an outer surface; said body having a bone engaging surface defined between said ends; and said coronal end being contoured such that when positioned within the jawbone said bone engaging surface is longest/greatest on the generally lingual side and shortest/least on the generally buccal side such that said bone engaging surface decreases from lingual to buccal.
Claim 16
Dependent Claim 89 words
A two-stage dental implant for implanting within the human jawbone, the jawbone having lingual and buccal sides, the implant comprising: a generally cylindrical longitudinal body having an apical end, a coronal end and an outer surface; said body having a bone engaging surface defined between said ends; and said coronal end being contoured such that when positioned within the jawbone said bone engaging surface is longest/greatest on the generally lingual side and shortest/least on the generally buccal side such that said bone engaging surface decreases from lingual to buccal.
Claim 17
Dependent Claim 19 words
a dental implant as defined in claim 14 , wherein said coronal end is adapted to accept an abutment.
Claim 18
Dependent Claim 22 words
A dental implant as defined in claim 15 , wherein said abutment is contoured to generally follow said contour of said end.
Claim 19
Dependent Claim 20 words
A dental implant as defined in claim 15 , wherein said abutment includes margins adapted to engage an impression cap.
Claim 20
Dependent Claim 18 words
A dental implant as defined in claim 14 , wherein said abutment extends coronally with off axis angulation.
Claim 21
Dependent Claim 125 words
A single-stage dental implant for implanting within the human jawbone, the jawbone having lingual and buccal sides, the implant comprising: a generally cylindrical longitudinal body having an apical end, a coronal end and an outer surface; said body having a bone engaging surface defined between said ends; said coronal end being contoured such that the bone engaging surface is prepared to be longest/greatest on the generally lingual side and shortest/least on the generally buccal side such that said bone engaging surface decreases from lingual to buccal when positioned within the jawbone; and said body also having a non-bone engaging surface extending coronally from said bone engaging surface whereby said non-bone engaging surface when combined with said bone engaging surface is longest/greatest on the lingual side.
Claim 22
Dependent Claim 125 words
A single-stage dental implant for implanting within the human jawbone, the jawbone having lingual and buccal sides, the implant comprising: a generally cylindrical longitudinal body having an apical end, a coronal end and an outer surface; said body having a bone engaging surface defined between said ends; said coronal end being contoured such that the bone engaging surface is prepared to be longest/greatest on the generally lingual side and shortest/least on the generally buccal side such that said bone engaging surface decreases from lingual to buccal when positioned within the jawbone; and said body also having a non-bone engaging surface extending coronally from said bone engaging surface whereby said non-bone engaging surface when combined with said bone engaging surface is longest/greatest on the lingual side.
Claim 23
Dependent Claim 38 words
A dental implant as defined in claims 14 or 19 , wherein said body has a diameter and includes at least one size of grooves or threads around said diameter on at least a portion of said body.
Claim 24
Dependent Claim 26 words
A dental implant as defined in claim 20 , wherein said grooves or threads are parallel with and adjacent to the contour of said coronal end.
Claim 25
Dependent Claim 33 words
A dental implant as defined in claim 20 , wherein said grooves or threads are perpendicular to the long axis of the implant body and adjacent to the contour of said coronal end.
Claim 26
Dependent Claim 32 words
A dental implant as defined in claim 22 , wherein said grooves on the coronal part of the implant body have multiple leading starting points to allow synchronization with larger apical grooves.
Claim 27
Dependent Claim 33 words
A dental implant as defined in claims 14 or 19 , wherein grit blasting or other surface texturing designed to promote osseointegration is used on the coronal aspect of all bone engaging surfaces.
Claim 28
Dependent Claim 25 words
A dental implant as defined in claim 19 , wherein said coronal end is adapted to accept an abutment extending coronally with or without angulation.
Claim 29
Dependent Claim 27 words
A dental implant as defined in claim 25 , wherein the coronal margin of the implant is adapted to engage an impression cap fitting over the abutment.
Claim 30
Dependent Claim 17 words
A dental implant as defined in claims 14 or 19 , wherein said coronal contour is straight.
Claim 31
Dependent Claim 17 words
A dental implant as defined in claims 14 or 19 , wherein said coronal contour is convex.
Claim 32
Dependent Claim 18 words
A dental implant as defined in claims 14 or 19 , wherein said bone engaging surface is textured.
Claim 33
Dependent Claim 26 words
A dental implant as defined in claims 14 or 19 , wherein said body is widest at said coronal end and narrows to parallel surfaces apically.
Claim 34
Dependent Claim 23 words
A dental implant as defined in claims 14 or 19 , wherein said body has threads on the apical portion of said body.
Claim 35
Dependent Claim 79 words
A dental implant for implanting within the human jawbone, the jawbone having lingual and buccal sides, the implant comprising: a generally cylindrical longitudinal body having an apical end and a coronal end; and said body having a bone engaging portion defined between said ends of a defined length, said coronal end of said bone engaging portion having a coronal facing generally asymmetric truncated cylindrical surface such that said bone engaging portion generally decreases in length from lingual to buccal.
Claim 36
Dependent Claim 79 words
A dental implant for implanting within the human jawbone, the jawbone having lingual and buccal sides, the implant comprising: a generally cylindrical longitudinal body having an apical end and a coronal end; and said body having a bone engaging portion defined between said ends of a defined length, said coronal end of said bone engaging portion having a coronal facing generally asymmetric truncated cylindrical surface such that said bone engaging portion generally decreases in length from lingual to buccal.
Claim 37
Dependent Claim 62 words
A dental implant as defined in claim 32 , wherein said asymmetrical truncated cylindrical surface has a lingual side surface and a buccal side surface and said defined length between said apical end and said lingual side surface is between around 1 mm to 4 mm longer in length than said defined length between said apical end and said buccal side surface.
Claim 38
Dependent Claim 46 words
A dental implant as defined in claim 33 , wherein said defined length between said apical end and said lingual side surface is around 2 mm to around 3 mm longer in length than said defined length between said apical end and said buccal side surface.
Claim 39
Dependent Claim 42 words
A dental implant as defined in claim 34 , wherein said defined length between said apical end and said lingual side surface is around 2 mm longer in length than said defined length between said apical end and said buccal side surface.
Claim 40
Dependent Claim 18 words
A dental implant as defined in claim 32 , wherein said generally asymmetrical truncated cylindrical surface is contoured.
Claim 41
Dependent Claim 15 words
A dental implant as defined in claim 36 , wherein said contour is slightly convex.
Claim 42
Independent Claim 79 words
A method for implanting a screw/thread type dental fixture within the human jawbone, the fixture having a coronal end, the method comprising: determining a correct implant site; determining a correct physical implant design; pre-drilling said site for said implant; determining an approximate number of rotations of said implant for an ideal penetration within the jawbone; and screwing the implant into the jawbone by rotating said implant said approximate number of rotations, such that said implant achieves said ideal penetration.
Claim 43
Independent Claim 79 words
A method for implanting a screw/thread type dental fixture within the human jawbone, the fixture having a coronal end, the method comprising: determining a correct implant site; determining a correct physical implant design; pre-drilling said site for said implant; determining an approximate number of rotations of said implant for an ideal penetration within the jawbone; and screwing the implant into the jawbone by rotating said implant said approximate number of rotations, such that said implant achieves said ideal penetration.
Claim 44
Dependent Claim 30 words
A method of implanting a screw/thread type dental fixture as defined in claim 38 , wherein said ideal penetration is such that the coronal end is flush with the jawbone.
Claim 45
Dependent Claim 29 words
A method for implanting a screw/thread type dental fixture as defined in claim 38 , wherein said ideal penetration is such that the coronal end is above the jawbone.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2006-12-01 2007-06-02 2007-12-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2010-12-01 2011-06-02 2011-12-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2014-12-01 2015-06-02 2015-12-02 $7700.00 Window Closed / Lapsed

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