US5571017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective surface, externally-threaded endosseous dental implant
Assignee: Zimmer Dental Inc
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Filing: 1994-10-05
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Granted: 1996-11-05
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Expires: 2014-10-05
Abstract
Abstract Endosseous dental implants having generally cylindrical-shaped bodies and self-tapping threads at the distal end and, in some case, external threads over a substantial portion of their external surface, include internal or external wrench-engaging surfaces at the proximal end portion and, between the relatively smooth distal and proximal end portions, an external middle region having greater surface roughness than the proximal or distal ends, or a coating, to promote attachment of the implant to bone tissue when the implant is placed in a generally-cylindrical passage formed in bone tissue to receive the implant.
Inventors
- 👤 Gerald A. Niznick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:48
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0022
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
112 words
An endosseous dental implant having a generally cylindrical shape and including, at its distal end, self-tapping threads, and at its proximal end, wrench-engaging surfaces for engaging a tool to place said implant in a generally-cylindrical passage formed in the jawbone of a person to receive said implant, said distal end and said proximal end having a roughness of up to about 20 microns measured by the average difference between the peaks and valleys of the surface texturing, and, between said distal and proximal ends, a relatively rough, middle region having a roughness of at least about 25 microns, measured by the average difference between the peaks and valleys of the surface texturing.
Claim 2
Dependent Claim
112 words
An endosseous dental implant having a generally cylindrical shape and including, at its distal end, self-tapping threads, and at its proximal end, wrench-engaging surfaces for engaging a tool to place said implant in a generally-cylindrical passage formed in the jawbone of a person to receive said implant, said distal end and said proximal end having a roughness of up to about 20 microns measured by the average difference between the peaks and valleys of the surface texturing, and, between said distal and proximal ends, a relatively rough, middle region having a roughness of at least about 25 microns, measured by the average difference between the peaks and valleys of the surface texturing.
Claim 3
Dependent Claim
23 words
The dental implant of claim 1 wherein said relatively rough, middle region of the external surface of the implant has randomized surface roughness.
Claim 4
Dependent Claim
52 words
The dental implant of claim 1 or claim 2 wherein the distal end of the implant includes at least one through-hole and at least one internal cavity of sufficient size and shape to receive and hold solids and liquids formed by the self-cutting threads as the implant is inserted into said passage.
Claim 5
Dependent Claim
14 words
The implant of claim 1 wherein said relatively rough, middle region is HA coated.
Claim 6
Dependent Claim
17 words
The implant of claim 1 wherein said relatively rough, middle region is coated with titanium plasma spray.
Claim 7
Dependent Claim
15 words
The implant of claim 1 wherein said relatively rough, middle region is formed by grit-blasting.
Claim 8
Dependent Claim
38 words
The endosseous dental implant of claim 1 or claim 2 or claim 4 or claim 5 or claim 6 wherein said wrench-engaging surfaces are at the proximal end of said implant and project upwardly from said top end.
Claim 9
Dependent Claim
68 words
The endosseous dental implant of claim 1 or claim 2 or claim 4 or claim 5 or claim 6 further comprising a top surface at said proximal end, and an external wall that includes said distal end, said proximal end, and said middle region, and wherein said wrench-engaging surfaces are inside said implant, below the top surface of said implant, and within the external wall of said implant.
Claim 10
Dependent Claim
99 words
An endosseous dental implant having a generally cylindrical shape including, at its distal end, self-tapping threads, and at its proximal end, wrench-engaging surfaces adapted to engage a tool to place said implant in a generally-cylindrical passage formed in the jawbone of a person to receive said implant, and, between said distal end and said proximal end, a relatively rough, externally-threaded middle region having a roughness at least about 25 percent greater than the roughness of said distal end and said proximal end, said roughness being measured by the average difference between the peaks and valleys of the surface texturing.
Claim 11
Dependent Claim
99 words
An endosseous dental implant having a generally cylindrical shape including, at its distal end, self-tapping threads, and at its proximal end, wrench-engaging surfaces adapted to engage a tool to place said implant in a generally-cylindrical passage formed in the jawbone of a person to receive said implant, and, between said distal end and said proximal end, a relatively rough, externally-threaded middle region having a roughness at least about 25 percent greater than the roughness of said distal end and said proximal end, said roughness being measured by the average difference between the peaks and valleys of the surface texturing.
Claim 12
Dependent Claim
23 words
The dental implant of claim 9 wherein said relatively rough, middle region of the external surface of the implant has randomized surface roughness.
Claim 13
Dependent Claim
52 words
The dental implant of claim 9 or claim 10 wherein the distal end of the implant includes at least one through-hole and at least one internal cavity of sufficient size and shape to receive and hold solids and liquids formed by the self-cutting threads as the implant is inserted into said passage.
Claim 14
Dependent Claim
14 words
The implant of claim 9 wherein said relatively rough, middle region is HA coated.
Claim 15
Dependent Claim
17 words
The implant of claim 9 wherein said relatively rough, middle region is coated with titanium plasma spray.
Claim 16
Dependent Claim
15 words
The implant of claim 9 wherein said relatively rough, middle region is formed by grit-blasting.
Claim 17
Dependent Claim
50 words
The endosseous dental implant of claim 9 or claim 10 or claim 12 or claim 13 or claim 14 wherein said distal end and said proximal end have a roughness of up to about 20 microns measured by the average difference between the peaks and valleys of the surface texturing.
Claim 18
Dependent Claim
38 words
The endosseous dental implant of claim 9 or claim 10 or claim 12 or claim 13 or claim 14 wherein said wrench-engaging surfaces are at the proximal end of said implant and project upwardly from said proximal end.
Claim 19
Dependent Claim
68 words
An endosseous dental implant having a generally cylindrical shape and including, at its distal end, self-tapping threads, and at its proximal end, wrench-engaging surfaces for engaging a tool to place said implant in a generally-cylindrical passage formed in the jawbone of a person to receive said implant, said distal end and said proximal end being uncoated, and, between said distal and said proximal ends, a coated middle region.
Claim 20
Dependent Claim
68 words
An endosseous dental implant having a generally cylindrical shape and including, at its distal end, self-tapping threads, and at its proximal end, wrench-engaging surfaces for engaging a tool to place said implant in a generally-cylindrical passage formed in the jawbone of a person to receive said implant, said distal end and said proximal end being uncoated, and, between said distal and said proximal ends, a coated middle region.
Claim 21
Dependent Claim
49 words
The dental implant of claim 17 wherein said distal end of the implant includes at least one through-hole and at least one internal cavity of sufficient size and shape to receive and hold solids and liquids formed by the self-cutting threads as the implant is inserted into said passage.
Claim 22
Dependent Claim
14 words
The dental implant of claim 17 wherein said middle region is coated with Hydroxylapatite.
Claim 23
Dependent Claim
16 words
The dental implant of claim 17 wherein said middle region is coated with Titanium Plasma Spray.
Claim 24
Dependent Claim
25 words
The dental implant of claim 17 wherein said wrench-engaging surfaces are at the top end of said implant and project upwardly from said top end.
Claim 25
Dependent Claim
55 words
The dental implant of claim 17 further comprising a top surface at said proximal end and an external wall that includes said distal end, said proximal end, and said middle region, and wherein said wrench-engaging surfaces are inside said implant, below the top surface of said implant, and within the external wall of said implant.
Claim 26
Dependent Claim
77 words
The dental implant of claim 1 or claim 2 or claim 3 or claim 4 or claim 5 or claim 6 or claim 7 or claim 7 or claim 8 or claim 9 or claim 10 or claim 11 or claim 12 or claim 13 or claim 14 or claim 15 or claim 16 or claim 17 or claim 18 or claim 19 or claim 20 or claim 21 or claim 22 wherein said-middle region is externally-threaded.
Claim 27
Dependent Claim
34 words
The dental implant of claim 17 or claim 18 or claim 19 or claim 20 or claim 21 or claim 22 wherein the uncoated portion of said proximal end includes an annular neck region.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-05 | 2000-05-06 | 2000-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-05 | 2004-05-06 | 2004-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-05 | 2008-05-06 | 2008-11-05 | $7700.00 | Window Closed / Lapsed |