Patent US1160853A successfully refreshed from Google Patents.
Patent US1555547A successfully refreshed from Google Patents.
US4293302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tooth implants
Assignee: Scientific Advances Inc
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Filing: 1980-03-26
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Granted: 1981-10-06
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Expires: 2000-03-26
Abstract
Abstract An improved dental endosteal implant is disclosed. The implant comprises a base and a core. The base is comprised of a bio-compatible material and has first and second ends and side walls which include serrations having substantially planar surfaces facing in the direction of the second end. The depth of the serrations nearest said second end is greater than the depth of the serrations nearest the first end. The core is configured so as to permit cooperative engagement with at least one prosthetic crown.
Inventors
- 👤 Craig R. Hassler
- 👤 Gary L. Messing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:39
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0037; A61C8/0045; A61C8/0048; A61C8/005; A61C8/0066; A61C8/0069; A61C8/0075
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
145 words
A dental, prosthetic, endosteal implant comprising: a base comprised of a bio-compatible material, said base having first and second ends axially spaced along the longitudinal axis of said base and sidewalls which include serrations comprising alternating oblique and substantially planar surfaces, said substantially planar surfaces being substantially perpendicular to both the longitudinal axis of said base and the direction of the intended occlusal load and said oblique surfaces being disposed at an angle to the longitudinal axis of said base, the surface area of said planar surfaces nearest said second end being greater than the surface area of said planar surfaces nearest said first end, said first end being the outermost end upon implantation and said second end being the implanted end; and a core extending from the first end of said base and configured to permit cooperative engagement with at least one prosthetic crown.
Claim 2
Dependent Claim
145 words
A dental, prosthetic, endosteal implant comprising: a base comprised of a bio-compatible material, said base having first and second ends axially spaced along the longitudinal axis of said base and sidewalls which include serrations comprising alternating oblique and substantially planar surfaces, said substantially planar surfaces being substantially perpendicular to both the longitudinal axis of said base and the direction of the intended occlusal load and said oblique surfaces being disposed at an angle to the longitudinal axis of said base, the surface area of said planar surfaces nearest said second end being greater than the surface area of said planar surfaces nearest said first end, said first end being the outermost end upon implantation and said second end being the implanted end; and a core extending from the first end of said base and configured to permit cooperative engagement with at least one prosthetic crown.
Claim 3
Dependent Claim
14 words
The implant of claim 1 wherein said bio-compatible material comprises alumina of high density.
Claim 4
Dependent Claim
17 words
The implant of claim 1 wherein said core and base comprise separate bodies which are joined together.
Claim 5
Dependent Claim
15 words
The implant of claim 1 wherein said serrations extend around the circumference of the base.
Claim 6
Dependent Claim
11 words
The implant of claim 1 wherein said base is substantially cylindrical.
Claim 7
Dependent Claim
19 words
The implant of claim 1 wherein said core is seated in a cavity in said base and attached thereto.
Claim 8
Dependent Claim
17 words
The implant to claim 5 wherein the longitudinal axes of said core and said base substantially coincide.
Claim 9
Dependent Claim
34 words
The implant of claim 1 wherein the depth of each of said serrations as defined by the lateral extent of each of said planar surfaces increases from said first end toward said second end.
Claim 10
Dependent Claim
16 words
The implant of claim 8 wherein the depth of said serrations increases at a uniform rate.
Claim 11
Dependent Claim
16 words
The implant of claim 1 wherein the depth of said serrations increases at a non-uniform rate.
Claim 12
Dependent Claim
13 words
The implant of claim 1 wherein said base is substantially rectangular in cross-section.
Claim 13
Dependent Claim
64 words
The implant of claim 1 wherein the depth of the serrations nearest said second end as defined by the lateral extent of each of said planar surfaces nearest said second end is at least about 50 percent greater than the depth of the serrations nearest said first end as defined by the lateral extent of each of said planar surfaces nearest said first end.
Claim 14
Dependent Claim
32 words
The implant of claim 12 wherein the depth of the serrations nearest said second end is at least about 100 percent greater than the depth of the serrations nearest said first end.
Claim 15
Dependent Claim
15 words
The implant of claim 2 wherein the density of said alumina exceeds about 93 percent.
Claim 16
Dependent Claim
12 words
The implant of claim 2 wherein said alumina is of high purity.
Claim 17
Dependent Claim
10 words
The implant of claim 1 wherein said base is tapered.
Claim 18
Dependent Claim
127 words
In a dental, prosthetic, endosteal implant comprising: a base comprised of a bio-compatible material, said base having first and second ends axially spaced along the longitudinal axis of said base and side walls which include serrations comprising alternating oblique and substantially planar surfaces, said substantially planar surfaces being substantially perpendicular to both the longitudinal axis of said base and the direction of the intended occlusal load and said oblique surfaces being disposed at an angle to the longitudinal axis of said base, said first end being the outermost end upon implantation and said second end being the implanted end; the improvement wherein the surface area of the planar surfaces nearest said second end is greater than the surface area of the planar surfaces nearest said first end.
Claim 19
Dependent Claim
127 words
In a dental, prosthetic, endosteal implant comprising: a base comprised of a bio-compatible material, said base having first and second ends axially spaced along the longitudinal axis of said base and side walls which include serrations comprising alternating oblique and substantially planar surfaces, said substantially planar surfaces being substantially perpendicular to both the longitudinal axis of said base and the direction of the intended occlusal load and said oblique surfaces being disposed at an angle to the longitudinal axis of said base, said first end being the outermost end upon implantation and said second end being the implanted end; the improvement wherein the surface area of the planar surfaces nearest said second end is greater than the surface area of the planar surfaces nearest said first end.
Claim 20
Dependent Claim
31 words
The implant of claim 17 further including a core which extends from the first end of said base and is configured to permit cooperative engagement with at least one prosthetic crown.
Claim 21
Dependent Claim
34 words
The implant of claim 17 wherein the depth of each of said serrations as defined by the lateral extent of each of said planar surfaces increases from said first end toward said second end.
Claim 22
Dependent Claim
16 words
The implant of claim 19 wherein the depth of said serrations increases at a uniform rate.
Claim 23
Dependent Claim
34 words
The implant of claim 20 wherein the depth of said serrations as defined by the lateral extent of said planar surfaces increases at a non-uniform rate from said first end toward said second end.
Claim 24
Dependent Claim
60 words
The implant of claim 17 wherein the depth of the serrations nearest said second end as defined by the lateral extent of the planar surfaces nearest said second end is at least about 50 percent greater than the depth of the serrations nearest said first end as defined by the lateral extent of the planar surfaces nearest said first end.
Claim 25
Dependent Claim
32 words
The implant of claim 22 wherein the depth of the serrations nearest said second end is at least about 100 percent greater than the depth of the serrations nearest said first end.
Claim 26
Dependent Claim
114 words
A dental, prosthetic, endosteal implant comprising: a base comprised of a bio-compatible material, said base having first and second ends axially spaced along the longitudinal axis of said base and side walls which include serrations comprising alternating oblique and substantially planar surfaces, said substantially planar surfaces being substantially perpendicular to both the longitudinal axis of said base and the direction of the intended occlusal load and said oblique surfaces being disposed at an angle to the longitudinal axis of said base, the surface area of said planar surfaces which, upon implantation, are adjacent to the aveolar crest being less than the surface area of said planar surfaces in the remaining portion of the base.
Claim 27
Dependent Claim
114 words
A dental, prosthetic, endosteal implant comprising: a base comprised of a bio-compatible material, said base having first and second ends axially spaced along the longitudinal axis of said base and side walls which include serrations comprising alternating oblique and substantially planar surfaces, said substantially planar surfaces being substantially perpendicular to both the longitudinal axis of said base and the direction of the intended occlusal load and said oblique surfaces being disposed at an angle to the longitudinal axis of said base, the surface area of said planar surfaces which, upon implantation, are adjacent to the aveolar crest being less than the surface area of said planar surfaces in the remaining portion of the base.
Claim 28
Dependent Claim
83 words
The implant of claim 24 wherein the depth of the serrations in the half of the base nearest to the first end as defined by the lateral extent of the planar surfaces in said half of the base nearest to the first end is less than the depth of the serrations in the half of the base nearest to the second end as defined by the lateral extent of the planar surfaces in said half of the base nearest to the second end.
Claim 29
Dependent Claim
23 words
The implant of claim 25 wherein the serrations in the half of the base nearest to the second end have substantially identical depths.
Claim 30
Dependent Claim
80 words
The implant of claim 24 wherein the depth of the serrations in the half of the base nearest to the second end as defined by the lateral extent of the planar surfaces in the half of the base nearest to the second end is at least about 50 percent greater than the depth of the serrations adjacent to the aveolar crest upon implantation as defined by the lateral extent of the planar surfaces adjacent to the aveolar crest upon implantation.
Claim 31
Dependent Claim
46 words
The implant of claim 27 wherein the depth of the serrations in the half of the base nearest to the second end is at least about 100 percent greater than the depth of the serrations in the half of the base nearest to the first end.
Claim 32
Dependent Claim
11 words
The implant of claim 24 wherein said bio-compatible material is alumina.
Claim 33
Dependent Claim
26 words
The implant of claim 24 further comprising a core extending from said first end and configured to permit cooperative engagement with at least one prosthetic crown.
Claim 34
Dependent Claim
17 words
The implant of claim 30 wherein the base and core comprise separate bodies which are joined together.
Claim 35
Dependent Claim
33 words
The implant of claim 24 wherein the minimum cross-sectional dimension of said base adjacent to the alveolar crest exceeds the minimum cross-sectional dimension of said base in the remaining portion of said base.
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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) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |