US4960381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw-type dental implant anchor
Assignee: Zimmer Dental Inc
•
Filing: 1988-08-10
•
Granted: 1990-10-02
•
Expires: 2008-08-10
Abstract
Abstract A screw-type dental implant anchor includes an externally-threaded body portion having internal structure for engaging an insertion tool. The body portion can be joined to a top portion having an unthreaded exterior wall. This internal is inside a top portion or inside the body portion of the anchor. The top portion is open, preferably chamfered at its upper end, and in registration with an internally-threaded shaft inside the body portion of the anchor that extends from a plane just below the head portion downwardly a substantial distance inside the body portion. The distal end of the anchor includes a through hole extending from one side of the body portion to the other, and an opening at the bottom of the body portion extending upwardly inside the body portion a distance sufficient to permit bone and associated tissue to grow into and through these openings and to permit blood tissue to escape.
Inventors
- 👤 Gerald A. Niznick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:58
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0022; A61C8/0037; A61C8/0039
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
95 words
A screw-type dental implant anchoring means comprises an externally-threaded body portion joined to a top portion having an unthreaded exterior wall, said implant having an internal, wrench-engaging surface, and an internally-threaded shaft extending downwardly from said top portion into said body portion, said top portion having an outer circumference substantially no greater than the circumference of the externally-threaded body portion, said internal, wrench-engaging surface lying substantially entirely within said shaft, inside said body portion, substantially entirely within the exterior walls of said anchoring means, and substantially entirely below the upper surface of said anchoring means.
Claim 2
Dependent Claim
95 words
A screw-type dental implant anchoring means comprises an externally-threaded body portion joined to a top portion having an unthreaded exterior wall, said implant having an internal, wrench-engaging surface, and an internally-threaded shaft extending downwardly from said top portion into said body portion, said top portion having an outer circumference substantially no greater than the circumference of the externally-threaded body portion, said internal, wrench-engaging surface lying substantially entirely within said shaft, inside said body portion, substantially entirely within the exterior walls of said anchoring means, and substantially entirely below the upper surface of said anchoring means.
Claim 3
Dependent Claim
26 words
The dental implant anchoring means of claim 1 further comprising, within said top portion, a chamfered internal surface at the upper opening of said top portion.
Claim 4
Dependent Claim
36 words
The dental implant anchoring means of claim 1 wherein said top portion includes, near the opening is in said top portion, a chamfered interior wall surface adapted to receive, engage and support said connectable prosthetic means.
Claim 5
Dependent Claim
18 words
The dental implant anchoring means of claim 1 wherein said internally-threaded shaft is above said internal, wrench-engaging surface.
Claim 6
Dependent Claim
18 words
The dental implant anchoring means of claim 1 wherein said internally-threaded shaft is below said internal, wrench-engaging surface.
Claim 7
Dependent Claim
36 words
The dental implant anchoring means of claim 1 wherein said internally-threaded shaft and said internal, wrench-engaging surface are adapted to receive and engage an adaptor selected from the group consisting of cementable adaptors and threaded adaptors.
Claim 8
Dependent Claim
51 words
A dental implant anchoring means comprising an externally-threaded body portion, and an internally-threaded shaft extending longitudinally into said body portion, said implant having internal, wrench-engaging implant insertion means lying substantially entirely within said shaft, substantially entirely inside said body portion, and substantially entirely below the upper surface of said anchoring means.
Claim 9
Dependent Claim
51 words
A dental implant anchoring means comprising an externally-threaded body portion, and an internally-threaded shaft extending longitudinally into said body portion, said implant having internal, wrench-engaging implant insertion means lying substantially entirely within said shaft, substantially entirely inside said body portion, and substantially entirely below the upper surface of said anchoring means.
Claim 10
Dependent Claim
31 words
The dental implant anchoring means of claim 7 further comprising, near the top of said shaft, a chamfered interior wall surface adapted to receive, engage and support said connectable prosthetic means.
Claim 11
Dependent Claim
18 words
The dental implant anchoring means of claim 7 wherein said internally-threaded shaft is above said internal, wrench-engaging surface.
Claim 12
Dependent Claim
18 words
The dental implant anchoring means of claim 7 wherein said internally-threaded shaft is below said internal, wrench-engaging surface.
Claim 13
Dependent Claim
36 words
The dental implant anchoring means of claim 7 wherein said internally-threaded shaft and said internal, wrench-engaging surface are adapted to receive and engage an adaptor selected from the group consisting of cementable adaptors and threaded adaptors.
Claim 14
Dependent Claim
89 words
A dental implant anchoring means comprising a body portion having threads on part of the external wall surface of the body portion, an internally-threaded shaft extending longitudinally into said body portion, a vent means on another, hollow part of the external wall surface of the body portion, and internal, wrench-engaging means lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, and substantially entirely below the top surface of said anchoring means, for inserting said implant into an opening formed in the tissue.
Claim 15
Dependent Claim
89 words
A dental implant anchoring means comprising a body portion having threads on part of the external wall surface of the body portion, an internally-threaded shaft extending longitudinally into said body portion, a vent means on another, hollow part of the external wall surface of the body portion, and internal, wrench-engaging means lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, and substantially entirely below the top surface of said anchoring means, for inserting said implant into an opening formed in the tissue.
Claim 16
Dependent Claim
26 words
The dental implant anchoring means of claim 12 further comprising a top portion joined to said body portion, said top portion having a smooth external wall.
Claim 17
Dependent Claim
26 words
The dental implant anchoring means of claim 12 further comprising a top portion joined to said body portion, said top portion having a smooth external wall.
Claim 18
Dependent Claim
17 words
The dental implant anchoring means of claim 12 wherein said internally-threaded shaft is above said internal means.
Claim 19
Dependent Claim
17 words
The dental implant anchoring means of claim 12 wherein said internally-threaded shaft is below said internal means.
Claim 20
Dependent Claim
21 words
The dental implant anchoring means of claim 16 further comprising a chamfered internal surface of the upper opening of said shaft.
Claim 21
Dependent Claim
36 words
The dental implant anchoring means of claim 12 wherein said internally-threaded shaft and said internal, wrench-engaging surface are adapted to receive and engage an adaptor selected from the group consisting of cementable adaptors and threaded adaptors.
Claim 22
Dependent Claim
111 words
A screw-type dental implant anchoring means comprising an externally-threaded body portion joined to a top portion having an unthreaded exterior wall, and an internally-threaded shaft inside said body portion, said implant having an internal, wrench-engaging surface lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, substantially entirely below the upper surface of said anchoring means, and inside said body portion for engaging implant insertion wrench means, said top portion being adapted to receive prosthetic connecting means for insertion into the upper surface of said implant anchoring means that forms a smooth, easily cleaned margin with said anchoring means upon insertion into said upper surface.
Claim 23
Dependent Claim
111 words
A screw-type dental implant anchoring means comprising an externally-threaded body portion joined to a top portion having an unthreaded exterior wall, and an internally-threaded shaft inside said body portion, said implant having an internal, wrench-engaging surface lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, substantially entirely below the upper surface of said anchoring means, and inside said body portion for engaging implant insertion wrench means, said top portion being adapted to receive prosthetic connecting means for insertion into the upper surface of said implant anchoring means that forms a smooth, easily cleaned margin with said anchoring means upon insertion into said upper surface.
Claim 24
Dependent Claim
29 words
The dental implant anchoring means of claim 19 wherein said threaded shaft extends downwardly from a plane just below said top portion a substantial distance inside the body portion.
Claim 25
Dependent Claim
49 words
The dental implant anchoring means of claim 20 further comprising, at the distal end of said anchoring means, a through hole extending from one side of the body portion to the other, and an opening at the bottom of the body portion extending axially upwardly inside the body portion.
Claim 26
Dependent Claim
25 words
The dental implant anchoring means of claim 19 further comprising, within said top portion, means for joining said anchoring means to said connecting prosthetic devices.
Claim 27
Dependent Claim
28 words
The dental implant anchoring means of claim 19 wherein said internally-threaded shaft extends from a plane just below said top portion downwardly a substantial distance inside said shaft.
Claim 28
Dependent Claim
36 words
The dental implant anchoring means of claim 19 wherein said internally-threaded shaft and said internal, wrench-engaging surface are adapted to receive and engage an adaptor selected from the group consisting of cementable adaptors and threaded adaptors.
Claim 29
Dependent Claim
101 words
A dental implant anchoring means comprising an externally-threaded body portion, and and internally threaded shift inside said body portion, said implant having internal, wrench-engaging means lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, substantially entirely below the top surface of said anchoring means and inside said body portion for engaging implant insertion wrench means, said anchoring means being adapted to receive prosthetic connecting means that includes post means that fit into said internally-threaded shaft and that form a smooth, easily cleaned margin with said anchoring means upon said insertion into said upper surface.
Claim 30
Dependent Claim
101 words
A dental implant anchoring means comprising an externally-threaded body portion, and and internally threaded shift inside said body portion, said implant having internal, wrench-engaging means lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, substantially entirely below the top surface of said anchoring means and inside said body portion for engaging implant insertion wrench means, said anchoring means being adapted to receive prosthetic connecting means that includes post means that fit into said internally-threaded shaft and that form a smooth, easily cleaned margin with said anchoring means upon said insertion into said upper surface.
Claim 31
Dependent Claim
18 words
The dental implant anchoring means of claim 25 wherein said internally-threaded shaft is above said internal, wrench-engaging surface.
Claim 32
Dependent Claim
18 words
The dental implant anchoring means of claim 25 wherein said internally-threaded shaft is below said internal, wrench-engaging surface.
Claim 33
Dependent Claim
36 words
The dental implant anchoring means of claim 25 wherein said internally-threaded shaft and said internal, wrench-engaging surface are adapted to receive and engage an adaptor selected from the group consisting of cementable adaptors and threaded adaptors.
Claim 34
Dependent Claim
98 words
A dental implant anchoring means comprising an externally-threaded body portion joined to a top portion having an unthreaded exterior wall, and an internally-threaded shaft inside said body portion, said implant having internal, wrench-engaging means lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, substantially entirely below the top surface of said anchoring means and inside said body portion for engaging implant insertion wrench means, said top portion being adapted to receive prosthetic connecting means that forms a smooth, easily cleaned margin with said anchoring means upon insertion into said upper surface.
Claim 35
Dependent Claim
98 words
A dental implant anchoring means comprising an externally-threaded body portion joined to a top portion having an unthreaded exterior wall, and an internally-threaded shaft inside said body portion, said implant having internal, wrench-engaging means lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, substantially entirely below the top surface of said anchoring means and inside said body portion for engaging implant insertion wrench means, said top portion being adapted to receive prosthetic connecting means that forms a smooth, easily cleaned margin with said anchoring means upon insertion into said upper surface.
Claim 36
Dependent Claim
35 words
The dental implant anchoring means of claim 29 wherein said top portion includes, near the opening in said top portion, a chamfered interior wall surface adapted to receive, engage and support said connectable prosthetic means.
Claim 37
Dependent Claim
18 words
The dental implant anchoring means of claim 29 wherein said internally-threaded shaft is above said internal, wrench-engaging surface.
Claim 38
Dependent Claim
18 words
The dental implant anchoring means of claim 29 wherein said internally-threaded shaft is below said internal, wrench-engaging surface.
Claim 39
Dependent Claim
36 words
The dental implant anchoring means of claim 29 wherein said internally-threaded shaft and said internal, wrench-engaging surface are adapted to receive and engage an adaptor selected from the group consisting of cementable adaptors and threaded adaptors.
Claim 40
Dependent Claim
140 words
A dental implant anchoring means comprising a top portion joined to a body portion, said body portion having threads on part of the external wall surface of the body portion, a vent means on another, hollow part of the external wall surface of the body portion, and an internally-threaded shaft inside said body portion, and internal, wrench-engaging means lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, substantially entirely below the top surface of said anchoring means, and inside said body portion for engaging wrench means for inserting said implant into an opening formed in jawbone tissue, said top portion being adapted to receive prosthetic connecting means, said prosthetic connecting means when placed in said internally-threaded shaft forming a smooth, easily cleaned margin with said anchoring means upon insertion into said upper surface.
Claim 41
Dependent Claim
140 words
A dental implant anchoring means comprising a top portion joined to a body portion, said body portion having threads on part of the external wall surface of the body portion, a vent means on another, hollow part of the external wall surface of the body portion, and an internally-threaded shaft inside said body portion, and internal, wrench-engaging means lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, substantially entirely below the top surface of said anchoring means, and inside said body portion for engaging wrench means for inserting said implant into an opening formed in jawbone tissue, said top portion being adapted to receive prosthetic connecting means, said prosthetic connecting means when placed in said internally-threaded shaft forming a smooth, easily cleaned margin with said anchoring means upon insertion into said upper surface.
Claim 42
Dependent Claim
36 words
The dental implant anchoring means of claim 34 wherein said internally-threaded shaft and said internal, wrench-engaging surface are adapted to receive and engage an adaptor selected from the group consisting of cementable adaptors and threaded adaptors.
Claim 43
Dependent Claim
60 words
A dental implant anchoring means comprising a body portion, an internally-threaded shaft extending downwardly from the top of said dental implant anchoring means into said body portion, and an internal, wrench-engaging surface lying substantially entirely within said shaft, substantially entirely within the exterior walls of said anchoring means , and substantially entirely below the top surface of said anchoring means.
Claim 44
Dependent Claim
60 words
A dental implant anchoring means comprising a body portion, an internally-threaded shaft extending downwardly from the top of said dental implant anchoring means into said body portion, and an internal, wrench-engaging surface lying substantially entirely within said shaft, substantially entirely within the exterior walls of said anchoring means , and substantially entirely below the top surface of said anchoring means.
Claim 45
Dependent Claim
48 words
The dental implant anchoring means of claim 36 further comprising, at the distal end of said anchoring means, a through-hole extending from one side of the body portion to the other, and an opening at the bottom of the body portion extending axially upwardly inside the body portion.
Claim 46
Dependent Claim
20 words
The dental implant anchoring means of claim 37 wherein the internal, wrench-engaging surface is adapted to receive a hex wrench.
Claim 47
Dependent Claim
26 words
The dental implant anchoring means of claim 36 further comprising a vent means on another, hollow part of the external wall surface of the body portion.
Claim 48
Dependent Claim
36 words
The dental implant anchoring means of claim 36 wherein said internally-threaded shaft and said internal, wrench-engaging surface are adapted to receive and engage an adaptor selected from the group consisting of cementable adaptors and threaded adaptors.
Claim 49
Dependent Claim
114 words
A dental implant anchoring means comprising an externally-threaded body portion, and an internally-threaded shaft extending downwardly from the top of said implant anchoring means inside said body portion, said implant having an internal, wrench-engaging surface lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, and lying substantially entirely below the top surface of said anchoring means, said shaft being adapted to receive prosthetic connecting means that forms a smooth, easily-cleaned margin with said anchoring means upon insertion into said shaft, said shaft including near the opening at the top of said shaft, a chamfered interior wall surface adapted to receive, engage and support said prosthetic connecting means.
Claim 50
Dependent Claim
114 words
A dental implant anchoring means comprising an externally-threaded body portion, and an internally-threaded shaft extending downwardly from the top of said implant anchoring means inside said body portion, said implant having an internal, wrench-engaging surface lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, and lying substantially entirely below the top surface of said anchoring means, said shaft being adapted to receive prosthetic connecting means that forms a smooth, easily-cleaned margin with said anchoring means upon insertion into said shaft, said shaft including near the opening at the top of said shaft, a chamfered interior wall surface adapted to receive, engage and support said prosthetic connecting means.
Claim 51
Dependent Claim
36 words
The dental implant according means of claim 41 wherein said internally-threaded shaft and said internal, wrench-engaging surface are adapted to receive and engage an adaptor selected from the group consisting of cementable adaptors and threaded adaptors.
Claim 52
Dependent Claim
112 words
A dental implant anchoring means comprising a body portion, and an internally-threaded shaft extending downwardly from the top of said implant anchoring means inside said body portion, said implant having an internal, wrench-engaging surface lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, and substantially entirely below the top surface of said anchoring means, said shaft being adapted to receive prosthetic connecting means that forms a smooth, easily-cleaned margin with said anchoring means upon insertion into said shaft, said shaft including near the opening at the top of said shaft, a chamfered interior wall surface adapted to receive, engage and support said prosthetic connecting means.
Claim 53
Dependent Claim
112 words
A dental implant anchoring means comprising a body portion, and an internally-threaded shaft extending downwardly from the top of said implant anchoring means inside said body portion, said implant having an internal, wrench-engaging surface lying substantially entirely inside said shaft, substantially entirely within the exterior walls of said anchoring means, and substantially entirely below the top surface of said anchoring means, said shaft being adapted to receive prosthetic connecting means that forms a smooth, easily-cleaned margin with said anchoring means upon insertion into said shaft, said shaft including near the opening at the top of said shaft, a chamfered interior wall surface adapted to receive, engage and support said prosthetic connecting means.
Claim 54
Dependent Claim
36 words
The dental implant anchoring means of claim 43 wherein said internally-threaded shaft and said internal, wrench-engaging surface are adapted to receive and engage an adaptor selected from the group consisting of cementable adaptors and threaded adaptors.
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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) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |