US5863201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infection-blocking dental implant
Assignee: Biomet 3I LLC
•
Filing: 1997-01-03
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Granted: 1999-01-26
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Expires: 2017-01-03
Abstract
Abstract An infection-blocking dental implant in which a threaded portion which contacts bone is roughened except for up to three threads which may be exposed by bone recession after implantation, which have a smooth surface. Preferably, the implant is of titanium or titanium alloy and the threaded portion is roughened by a two-step acid treatment.
Inventors
- 👤 Richard J. Lazzara
- 👤 Thomas S. Heylmun
- 👤 Keith D. Beaty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
B; B24; B24C; B24C11/00; A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0022; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30771; A61L; A61L27/00; A61L27/02; A61L27/04; A61L27/06; A61L27/28; A61L27/30; A61L27/306; A61L27/32; A61L27/50; C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/26; A61C8/0037; A61C2008/0046; A61F2/3094; A61F2002/30838; A61F2002/30904; A61F2002/30906; A61F2002/30925; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00389; A61F2310/00592; A61F2310/00598; A61F2310/00616; A61F2310/00796; A61F2310/0097; A61F2310/00976; A61L2400/00; A61L2400/18; A61L2430/00; A61L2430/02; A61L2430/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
108 words
A dental implant having a head portion, a neck portion, and a threaded portion for contact with bone wherein said head and neck portions are provided with a smooth surface for contact with overlying gingival tissue for blocking infection and said threaded portion is roughened to promote osseointegration with bone while leaving at least one thread adjacent said neck portion smooth and unroughened, wherein said implant is titanium or a titanium alloy and said roughness is created by a two-step process in which the native oxide is removed by contact with a first acid solution and followed by etching of the resulting surface with a second acid solution.
Claim 2
Dependent Claim
108 words
A dental implant having a head portion, a neck portion, and a threaded portion for contact with bone wherein said head and neck portions are provided with a smooth surface for contact with overlying gingival tissue for blocking infection and said threaded portion is roughened to promote osseointegration with bone while leaving at least one thread adjacent said neck portion smooth and unroughened, wherein said implant is titanium or a titanium alloy and said roughness is created by a two-step process in which the native oxide is removed by contact with a first acid solution and followed by etching of the resulting surface with a second acid solution.
Claim 3
Dependent Claim
18 words
A dental implant of claim 1 wherein up to three threads adjacent said neck portion are left smooth.
Claim 4
Dependent Claim
27 words
A dental implant of claim 1 wherein a length of about 3 mm of said implant including said head, neck, and adjacent threaded portions is left smooth.
Claim 5
Dependent Claim
21 words
A dental implant of claim 1 wherein the head, neck, and threaded portions left smooth have a surface created by machining.
Claim 6
Dependent Claim
109 words
A dental implant comprising (a) a roughened bottom portion for facilitating osseointegration with bone; (b) a smooth neck portion adjacent said roughened portion for contact with gingival tissue; and (c) a smooth head portion adjacent said neck portion for receiving a dental restoration; wherein said roughened portion of (a) is threaded and at least one thread adjacent said neck portion is left smooth and unroughened; wherein said implant is titanium or titanium alloy and said roughness is created by a two-step process in which the native oxide is removed by contact with a first acid solution and followed by etching of the resulting surface with a second acid solution.
Claim 7
Dependent Claim
109 words
A dental implant comprising (a) a roughened bottom portion for facilitating osseointegration with bone; (b) a smooth neck portion adjacent said roughened portion for contact with gingival tissue; and (c) a smooth head portion adjacent said neck portion for receiving a dental restoration; wherein said roughened portion of (a) is threaded and at least one thread adjacent said neck portion is left smooth and unroughened; wherein said implant is titanium or titanium alloy and said roughness is created by a two-step process in which the native oxide is removed by contact with a first acid solution and followed by etching of the resulting surface with a second acid solution.
Claim 8
Dependent Claim
20 words
A dental implant of claim 5 wherein up to three threads adjacent said neck portion are left smooth and unroughened.
Claim 9
Dependent Claim
23 words
A dental implant of claim 5 wherein the length of said head, neck, and smooth threads is a total of about 3 mm.
Claim 10
Dependent Claim
21 words
A dental implant of claim 5 wherein the head, neck, and threaded portions left smooth have a surface created by machining.
Claim 11
Dependent Claim
15 words
A dental implant of claim 1 wherein said first acid solution is aqueous hydrofluoric acid.
Claim 12
Dependent Claim
15 words
A dental implant of claim 5 wherein said first acid solution is aqueous hydrofluoric acid.
Claim 13
Dependent Claim
19 words
A dental implant of claim 9 wherein said second acid solution is a mixture of sulfuric and hydrochloric acids.
Claim 14
Dependent Claim
19 words
A dental implant of claim 10 wherein said second acid solution is a mixture of sulfuric and hydrochloric acids.
References Cited (Backward Citations)
US3855638A
Cited
US4145764A
Cited
US4195409A
Cited
US4722688A
Cited
US4547157A
Cited
US4818559A
Cited
US5344457A
Cited
US5071351A
Cited
US4826434A
Cited
US4908030A
Cited
US4944754A
Cited
US5000685A
Cited
US5000685B1
Cited
US4911953A
Cited
US4874434A
Cited
US5188800A
Cited
US5456723A
Cited
US5205745A
Cited
US5190795A
Cited
US5030096A
Cited
US5573401A
Cited
US5344425A
Cited
GB2252501A
Cited
US5362237A
Cited
US5360448A
Cited
US5478237A
Cited
US5316476A
Cited
US5316476B1
Cited
US5588838A
Cited
EP0606566A1
Cited
US5297963A
Cited
US5316477A
Cited
US5368483A
Cited
US5433606A
Cited
US5503558A
Cited
US5368480A
Cited
US5564923A
Cited
US5489210A
Cited
US5399090A
Cited
US5571017A
Cited
US5603338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-01-25 | 2002-07-27 | 2003-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-25 | 2006-07-27 | 2007-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-25 | 2010-07-27 | 2011-01-26 | $7700.00 | Window Closed / Lapsed |