US4904187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental implant
Assignee: Biomet 3I LLC
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Filing: 1988-04-13
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Granted: 1990-02-27
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Expires: 2008-04-13
Abstract
Abstract A dental device implantable in bone comprises a hollow cylinder which has an open end and a closed end with an outer surface between the ends. A plurality of shallow oblong-shaped grooves are formed into the surface near the closed end with the longitudinal axis of the grooves aligned to inhibit rotation of the device in the bone. Additionally, a shallow annular depression traversing each of the grooves is formed into the surface to inhibit vertical displacement of the device in the bone.
Inventors
- 👤 William F. Zingheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:47
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
174 words
A device implantable in bone for holding objects while substantially eliminating stress risers at the interface between the bone and the implant which comprises: a tubular cylinder having an open end and a closed end, with an outer surface between said ends and a cavity extending longitudinally into said device from said open end toward said closed end; a plurality of oblong-shaped shallow grooves each of said grooves defining a rounded transition between said groove and outer surface which is rounded and has an arc length less than thirty degrees, said grooves being formed into said surface near said closed end with the longitudinal axes of said grooves aligned substantially parallel to the longitudinal axis of said cylinder to inhibit rotation of said device in said bone; an annular depression traversing each of said grooves and defining a transition between said depression and said outer surface which is rounded and has an arc length less than thirty degrees, said depression being formed into said surface to inhibit displacement of said device in said bone.
Claim 2
Independent Claim
174 words
A device implantable in bone for holding objects while substantially eliminating stress risers at the interface between the bone and the implant which comprises: a tubular cylinder having an open end and a closed end, with an outer surface between said ends and a cavity extending longitudinally into said device from said open end toward said closed end; a plurality of oblong-shaped shallow grooves each of said grooves defining a rounded transition between said groove and outer surface which is rounded and has an arc length less than thirty degrees, said grooves being formed into said surface near said closed end with the longitudinal axes of said grooves aligned substantially parallel to the longitudinal axis of said cylinder to inhibit rotation of said device in said bone; an annular depression traversing each of said grooves and defining a transition between said depression and said outer surface which is rounded and has an arc length less than thirty degrees, said depression being formed into said surface to inhibit displacement of said device in said bone.
Claim 3
Dependent Claim
13 words
A device as cited in claim 1 wherein said depression bisects said grooves.
Claim 4
Dependent Claim
35 words
A device as cited in claim 2 further comprising a neck surrounding said cavity at said open end, said neck presenting a surface which is slightly raised relative to said outer surface of said cylinder.
Claim 5
Dependent Claim
19 words
A device as cited in claim 3 wherein said cavity is internally threaded for threadable engagement with said object.
Claim 6
Dependent Claim
32 words
A device as cited in claim 4 wherein said cavity is formed with a plurality of opposed sides, each of said sides presenting a flat face toward the interior of said cavity.
Claim 7
Dependent Claim
13 words
A device as cited in claim 5 wherein said sides form a hexagon.
Claim 8
Dependent Claim
13 words
A device as cited in claim 6 wherein said closed end is rounded.
Claim 9
Dependent Claim
28 words
A device as cited in claim 7 wherein said closed end is formed with a circular flat and a ramped surface between said flat and said outer surface.
Claim 10
Dependent Claim
29 words
A device as cited in claim 8 wherein said grooves are approximately 0.040 inches in width, 0.015 inches in depth, and from 0.12 inches to 0.32 inches in length.
Claim 11
Dependent Claim
13 words
A device as cited in claim 9 comprising a plurality of said depressions.
Claim 12
Dependent Claim
17 words
A device as cited in claim 10 further comprising a healing screw threadably engageable with said cavity.
Claim 13
Dependent Claim
96 words
A bone adaptable dental implant for substantially eliminating stress risers at the interface between the bone and the implant which comprises: a tubular cylinder having a smooth outer surface; a plurality of grooves oriented longitudinally on said cylinder, each of said grooves defining a transition between said groove and said outer surface which is rounded and has an arc length less than thirty degrees; and an annular depression which traverses said grooves and which defines a transition between said depression and said outer surface which is rounded and has an arc length less than thirty degrees.
Claim 14
Dependent Claim
96 words
A bone adaptable dental implant for substantially eliminating stress risers at the interface between the bone and the implant which comprises: a tubular cylinder having a smooth outer surface; a plurality of grooves oriented longitudinally on said cylinder, each of said grooves defining a transition between said groove and said outer surface which is rounded and has an arc length less than thirty degrees; and an annular depression which traverses said grooves and which defines a transition between said depression and said outer surface which is rounded and has an arc length less than thirty degrees.
Claim 15
Dependent Claim
44 words
A bone adaptable dental implant as recited in claim 12 wherein said cylinder comprises an open end and a closed end, with an outer surface between said ends and a cavity extending longitudinally into said implant from said open end toward said closed end.
Claim 16
Dependent Claim
38 words
A bone adaptable dental implant as recited in claim 13 further comprising a neck surrounding said cavity at said open end, said neck presenting a surface which is slightly raised relative to said outer surface of said cylinder.
Claim 17
Dependent Claim
13 words
A device as cited in claim 14 wherein said closed end is rounded.
Claim 18
Dependent Claim
28 words
A device as cited in claim 14 wherein said closed end is formed with a circular flat and a ramped surface between said flat and said outer surface.
Claim 19
Dependent Claim
29 words
A device as cited in claim 14 wherein said grooves are approximately 0.040 inches in width, 0.015 inches in depth, and from 0.12 inches to 0.32 inches in length.
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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) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |