Patent US5106300A successfully refreshed from Google Patents.
US5106300A
Expired / Lapsed
US
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Dental implant attachment structure and method
Assignee: Individual
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Filing: 1990-09-26
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Granted: 1992-04-21
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Expires: 2010-09-26
Abstract
Abstract A dental implant attachment structure comprises an abutment member having a base end shaped for mating engagement with an upper coupling face of an implant member, the abutment member having a through bore and spaced inner and outer walls extending from its base end to form an internal chamber open at the opposite end of the member, a securing mechanism for extending through the bore to releasably secure the abutment member to an implant member, and an impression cap for releasably mounting on the open upper end of the abutment member to close the internal chamber. In one embodiment the securing mechanism comprises a single screw. The abutment member serves both as an impression transfer part for transferring the implant site to a laboratory cast, and also as part of the final laboratory manufactured restoration for installation at the implant site.
Inventors
- 👤 Anton J. Voitik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:43
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0048; A61C8/0001
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
121 words
A denture attachment system, comprising: an abutment member having a mating abutment surface at one, base end comprising means for mating engagement with the upper mating surface of an implant member installed in a patient's jaw, the abutment member being open at its opposite upper end and having a central through bore and annular chamber surrounding said through bore for receiving denture casting material to secure the abutment member to a denture; securing means for insertion in said through bore to releasably secure the abutment member to an implant member; and an impression cap member for releasably securing to the open upper end of the abutment member, the cap member including means for sealing the internal volume of the abutment member.
Claim 2
Dependent Claim
121 words
A denture attachment system, comprising: an abutment member having a mating abutment surface at one, base end comprising means for mating engagement with the upper mating surface of an implant member installed in a patient's jaw, the abutment member being open at its opposite upper end and having a central through bore and annular chamber surrounding said through bore for receiving denture casting material to secure the abutment member to a denture; securing means for insertion in said through bore to releasably secure the abutment member to an implant member; and an impression cap member for releasably securing to the open upper end of the abutment member, the cap member including means for sealing the internal volume of the abutment member.
Claim 3
Independent Claim
46 words
The system as claimed in claim wherein said securing means includes first temporary securing means for releasably securing said abutment member to an implant member during impression taking, and a second final securing means for securing the abutment member and attached denture to the implant member.
Claim 4
Dependent Claim
35 words
The system as claimed in claim 2, wherein said final securing means comprises a fixation screw for attaching said abutment member to said implant member and anti-rotation means for preventing rotation of said fixation screw.
Claim 5
Independent Claim
49 words
The system as claimed in claim wherein said abutment member comprises a generally cylindrical member having an outer diameter at said base end matching that of said implant member mating end, the member having spaced inner and outer walls projecting from said base end to form said annular chamber.
Claim 6
Dependent Claim
33 words
The system as claimed in claim 4, wherein the opposing inner and outer surfaces of said outer and inner walls, respectively, have retention grooves for receiving casting material poured into said internal volume.
Claim 7
Dependent Claim
17 words
The system as claimed in claim 4, wherein the outer wall is shorter than said inner wall.
Claim 8
Dependent Claim
36 words
The system as claimed in claim 4, wherein the outer surface of said outer wall is a polished, smooth surface, the system further including an outer protective sleeve for releasable sliding engagement over said outer wall.
Claim 9
Dependent Claim
41 words
The system as claimed in claim 4, wherein said outer wall tapers outwardly from said base end towards said upper end to form a generally V-shaped annular internal volume extending from said base end towards the upper end of said member.
Claim 10
Dependent Claim
47 words
The system as claimed in claim 8, wherein said cap member includes an upper part of outer dimensions substantially matching those of the outer wall of said abutment member, and a downwardly extending annular projection for mating engagement with said annular internal volume of said abutment member.
Claim 11
Dependent Claim
49 words
The system as claimed in claim 4, wherein said outer wall is shorter than said inner wall, said cap member having a through bore for mating engagement over said inner wall, and projecting filler means for extending into and filling the internal volume between said inner and outer walls.
Claim 12
Dependent Claim
103 words
The system as claimed in claim 4, wherein said abutment member through bore is of stepped diameter, including an enlarged diameter portion extending from said open end, a reduced diameter intermediate portion, and a mating end portion matching the shape of a projecting end portion of an insert member to which it is to be attached, the securing means comprises a temporary fixation screw member having an elongate head portion of length greater than said enlarged diameter portion, and a shaft portion extending from said head portion and having outer securing means for securing to corresponding internal securing means in said implant member.
Claim 13
Dependent Claim
75 words
The system as claimed in claim 11, wherein said securing means further comprises a final fixation screw having a shorter head portion, and anti-rotation means for fitting into said enlarged bore portion above said fixation screw head, the anti-rotation means having means for coupling to the upper end of said fixation screw and means for engaging with the inner surface of said bore portion to resist rotation of said anti-rotation means and attached fixation screw.
Claim 14
Dependent Claim
37 words
The system as claimed in claim 1, wherein said cap member includes orientation means on its outer peripheral surface for producing a correspondingly shaped orientation marking in an impression made over said cap member and abutment member.
Claim 15
Dependent Claim
23 words
The system as claimed in claim 13, wherein said orientation means comprises a flat on the outer peripheral surface of said cap member.
Claim 16
Independent Claim
203 words
A method of forming and attaching a denture to one or more implant members installed in a patient's jaw, comprising the steps of: temporarily securing a mating, abutment base end of an abutment member to a matching, upper mating end of an installed implant member; releasably securing an impression cap to an open upper end of the abutment member to cover and seal an internal volume of the abutment member; taking an impression of the patient's jaw in the area of the implant around the abutment member and impression cap; releasing the abutment member from the implant member; removing the impression and attached abutment member from the patient's mouth; attaching an analogue of the implant member to the abutment member; casting material around the impression, abutment member and attached analogue to form a working cast of the patient's jaw with the implant location; removing the impression and impression cap from the abutment member; forming a desired restorative structure and attaching it to the abutment member with portions of the restorative structure extending into the internal volume; releasing the abutment member and restorative structure from the implant analogue; and attaching the abutment member and restorative structure to the implant member in the patient's mouth.
Claim 17
Independent Claim
203 words
A method of forming and attaching a denture to one or more implant members installed in a patient's jaw, comprising the steps of: temporarily securing a mating, abutment base end of an abutment member to a matching, upper mating end of an installed implant member; releasably securing an impression cap to an open upper end of the abutment member to cover and seal an internal volume of the abutment member; taking an impression of the patient's jaw in the area of the implant around the abutment member and impression cap; releasing the abutment member from the implant member; removing the impression and attached abutment member from the patient's mouth; attaching an analogue of the implant member to the abutment member; casting material around the impression, abutment member and attached analogue to form a working cast of the patient's jaw with the implant location; removing the impression and impression cap from the abutment member; forming a desired restorative structure and attaching it to the abutment member with portions of the restorative structure extending into the internal volume; releasing the abutment member and restorative structure from the implant analogue; and attaching the abutment member and restorative structure to the implant member in the patient's mouth.
Claim 18
Dependent Claim
32 words
The method as claimed in claim 15, wherein the step of forming and attaching the restorative structure comprises casting denture material directly around and into the internal volume of the abutment member.
Claim 19
Dependent Claim
54 words
The method as claimed in claim 15, wherein the step of forming and attaching the restorative structure comprises forming a pattern of the desired restorative structure around the abutment member, using the pattern to form a cast of the restorative structure separate from the abutment member, and attaching the cast to the abutment member.
Claim 20
Dependent Claim
39 words
The method as claimed in claim 15, including a step of cutting an outer wall of the abutment member so that its upper edge follows the contour of the gum line surrounding the implant site in the working cast.
Claim 21
Dependent Claim
80 words
The method as claimed in claim 15, wherein the step of attaching the abutment member and restorative structure to the implant member comprises inserting a securing device through a central through bore in the implant member to secure the abutment member to the implant member, and inserting a filler member in the exposed, upper end of the through bore with the upper end of the filler member machined to follow the contour of the upper surface of the restorative structure.
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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) | 1995-04-21 | 1995-10-21 | 1996-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-21 | 1999-10-21 | 2000-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-21 | 2003-10-21 | 2004-04-21 | $7700.00 | Window Closed / Lapsed |