US6672872B2
Expired / Lapsed
US
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Modified dental implant fixture
Assignee: Astra Tech AB
•
Filing: 2002-08-19
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Granted: 2004-01-06
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Expires: 2022-08-19
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 Cottrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
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: 39
Claim 1
Independent Claim
109 words
A 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 outer surface, an apical end and a coronal end having an inner female conical shape; an abutment having a lower portion with an outer male conical shape for connection with the inner conical shape of the coronal end of said body; 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.
Claim 2
Dependent Claim
109 words
A 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 outer surface, an apical end and a coronal end having an inner female conical shape; an abutment having a lower portion with an outer male conical shape for connection with the inner conical shape of the coronal end of said body; 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.
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
22 words
A dental implant as defined in claim 2 , wherein said grooves are perpendicular to the long axis of said implant body.
Claim 6
Dependent Claim
23 words
A dental implant as defined in claim 1 , wherein said inner and outer conical shape is tapered between 5 and 30b degrees.
Claim 7
Dependent Claim
23 words
A dental implant as defined in claim 1 , wherein said abutment is contoured to generally follow said contour of said coronal end.
Claim 8
Dependent Claim
20 words
A dental implant as defined in claim 1 , wherein said abutment includes margins adapted to engage an impression cap.
Claim 9
Dependent Claim
15 words
A dental implant as defined in claim 7 , further including undercuts above said margins.
Claim 10
Dependent Claim
15 words
A dental implant as defined in claim 1 , wherein said coronal contour is straight.
Claim 11
Dependent Claim
15 words
A dental implant as defined in claim 1 , wherein said coronal contour is convex.
Claim 12
Dependent Claim
14 words
A dental implant as defined in claim 1 , wherein said surface is textured.
Claim 13
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 14
Dependent Claim
32 words
A dental implant as defined in claim 1 , wherein said abutment includes a bolt hole and said body includes a threaded hole for a connection bolt tightening of the body abutment.
Claim 15
Dependent Claim
107 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 outer surface, an apical end and a coronal end having an inner conical shape; an abutment having a lower portion with an outer conical shape for connection with the inner conical shape of the coronal end of said body; 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.
Claim 16
Dependent Claim
107 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 outer surface, an apical end and a coronal end having an inner conical shape; an abutment having a lower portion with an outer conical shape for connection with the inner conical shape of the coronal end of said body; 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.
Claim 17
Dependent Claim
23 words
A dental implant as defined in claim 14 , wherein said inner and outer conical shape is tapered between 5 and 30 degrees.
Claim 18
Dependent Claim
22 words
A dental implant as defined in claim 14 , 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 14 , wherein said abutment includes margins adapted to engage an impression cap.
Claim 20
Dependent Claim
151 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 outer surface, an apical end and a coronal end having an inner conical shape; an abutment having a lower portion with an outer conical shape for connection with the inner conical shape of the coronal end of said body; said body having a bone engaging surface defined between said ends; said coronal end being contoured such that the bone engaging surface can be prepared to be longest/greatest on the generally lingual side and shortest/least on the generally buccal side 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 and shortest/least on the generally buccal side.
Claim 21
Dependent Claim
151 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 outer surface, an apical end and a coronal end having an inner conical shape; an abutment having a lower portion with an outer conical shape for connection with the inner conical shape of the coronal end of said body; said body having a bone engaging surface defined between said ends; said coronal end being contoured such that the bone engaging surface can be prepared to be longest/greatest on the generally lingual side and shortest/least on the generally buccal side 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 and shortest/least on the generally buccal side.
Claim 22
Dependent Claim
38 words
A dental implant as defined in claims 14 or 18 , 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 23
Dependent Claim
26 words
A dental implant as defined in claim 19 , wherein said grooves or threads are parallel with and adjacent to the contour of said coronal end.
Claim 24
Dependent Claim
33 words
A dental implant as defined in claim 19 , 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 25
Dependent Claim
17 words
A dental implant as defined in claim 18 , wherein said grooves are parallel with said contour.
Claim 26
Dependent Claim
22 words
A dental implant as defined in claim 18 , wherein said grooves are perpendicular to the long axis of the implant body.
Claim 27
Dependent Claim
33 words
A dental implant as defined in claims 14 or 18 , 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
17 words
A dental implant as defined in claims 14 or 18 , wherein said coronal contour is straight.
Claim 29
Dependent Claim
17 words
A dental implant as defined in claims 14 or 18 , wherein said coronal contour is convex.
Claim 30
Dependent Claim
18 words
A dental implant as defined in claims 14 or 18 , wherein said bone engaging surface is textured.
Claim 31
Dependent Claim
26 words
A dental implant as defined in claims 14 or 18 , wherein said body is widest at said coronal end and narrows to parallel surfaces apically.
Claim 32
Dependent Claim
24 words
A dental implant as defined in claims 14 or 18 , wherein said body has threads on the apical portion of the said body.
Claim 33
Dependent Claim
98 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 outer surface, an apical end and a coronal end having an inner conical shape; an abutment having a lower portion with an outer conical shape for connection with the inner conical shape of the coronal end of said body; 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.
Claim 34
Dependent Claim
98 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 outer surface, an apical end and a coronal end having an inner conical shape; an abutment having a lower portion with an outer conical shape for connection with the inner conical shape of the coronal end of said body; 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.
Claim 35
Dependent Claim
62 words
A dental implant as defined in claim 30 , wherein said asymmetric 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 36
Dependent Claim
46 words
A dental implant as defined in claim 31 , 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 37
Dependent Claim
42 words
A dental implant as defined in claim 32 , 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 38
Dependent Claim
18 words
A dental implant as defined in claim 30 , wherein said generally asymmetric truncated cylindrical surface is contoured.
Claim 39
Dependent Claim
14 words
A dental implant as defined in claim 34 wherein said contour is slightly convex.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-01-05 | 2007-07-07 | 2008-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-01-05 | 2011-07-07 | 2012-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-01-05 | 2015-07-07 | 2016-01-06 | $7700.00 | Window Closed / Lapsed |