Patent US5588838A successfully refreshed from Google Patents.
US5588838A
Expired / Lapsed
US
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Fixture for use in a dental implant system
Assignee: AstraZeneca AB
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Filing: 1993-10-25
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Granted: 1996-12-31
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Expires: 2013-10-25
Abstract
Abstract A fixture, for use in a dental implant system, of the type having an upper portion with a conically flaring outer surface. The conically flaring outer surface is provided with a circumferentially oriented, defined micro-roughness, preferably in the form of threads or beads, having a height between 0.02 and 0.20 mm, and most preferably approximately 0.1 mm. In the preferred embodiment, the distance between adjacent threads or beads, crest to crest, is approximately twice the height of the threads or beads, respectively.
Inventors
- 👤 Stig G. V. Hansson
- 👤 Anders Holmen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:02
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0022; A61C8/0025; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30771; A61F2002/3085; A61F2002/30851; A61F2002/30864; A61F2002/30873
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
In a fixture for use in a dental implant system, said fixture having an outer end provided with a conically flaring outer surface intended to at least partly abut the bone tissue, the improvement wherein said conically flaring outer surface is provided with a circumferentially oriented, defined micro-roughness (9, 109) having a height between 0.02 and 0.20 mm.
Claim 2
Dependent Claim
58 words
In a fixture for use in a dental implant system, said fixture having an outer end provided with a conically flaring outer surface intended to at least partly abut the bone tissue, the improvement wherein said conically flaring outer surface is provided with a circumferentially oriented, defined micro-roughness (9, 109) having a height between 0.02 and 0.20 mm.
Claim 3
Dependent Claim
17 words
A fixture according to claim 1, wherein said micro-roughness has a height between 0.02 and 0.15 mm.
Claim 4
Dependent Claim
17 words
A fixture according to claim 2, wherein said micro-roughness has a height between 0.05 and 0.15 mm.
Claim 5
Dependent Claim
17 words
A fixture according to claim 2 or 3, wherein said micro-roughness has a height of 0.1 mm.
Claim 6
Dependent Claim
36 words
A fixture according to claim 2 or 3, wherein said micro-roughness comprises circumferentially oriented projections, each having a crest, and wherein the distance between projections, crest to crest, is approximately twice the height of the projections.
Claim 7
Dependent Claim
33 words
A fixture according to claim 4, wherein said micro-roughness comprises circumferentially oriented projections, having a crest, and wherein the distance between projections, crest to crest, is approximately twice the height of the projections.
Claim 8
Dependent Claim
18 words
A fixture according to claim 1, wherein the defined micro-roughness is in the form of circumferential beads (109).
Claim 9
Dependent Claim
18 words
A fixture according to claim 1, wherein the defined micro-roughness is in the form of a microthread (9).
Claim 10
Dependent Claim
30 words
A fixture according to claim 7 or 8, wherein the distance between adjacent threads or beads, crest to crest, is approximately twice the height of the threads or beads, respectively.
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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) | 1999-12-31 | 2000-07-01 | 2000-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-31 | 2004-07-01 | 2004-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-31 | 2008-07-01 | 2008-12-31 | $7700.00 | Window Closed / Lapsed |