US4906191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental bridge
Assignee: Astra Tech AB
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Filing: 1988-06-15
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Granted: 1990-03-06
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Expires: 2008-06-15
Abstract
Abstract The invention relates to a method and a means for preparation of a dental bridge for a dental prosthesis. The dental bridge is modelled by casting in a mould prepared from a casting model. The casting model is built up in the mouth of the patient by modules (3,6) which are joined together into a unit. A module consists of a metal socket (3) on which a cap (6) with a through hole is mounted. The modules are connected to each other preferably by gluing.
Inventors
- 👤 Per O. Soderberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:16
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0001; A61C8/0048
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
In a method of preparing a dental bridge of the type that is affixed to a plurality of osseointegrated anchoring elements implanted in a jawbone, such method including the step wherein the bridge is prepared by casting in a mold made from a casting model, the improvement wherein the casting mode is produced in place on the anchoring elements by the steps of temporarily fastening to each of the plurality of anchoring elements a socket fitted with a prefabricated modular cap, the caps being sized such that a gap is left between adjacent caps, and joining the adjacent caps into a unit.
Claim 2
Dependent Claim
102 words
In a method of preparing a dental bridge of the type that is affixed to a plurality of osseointegrated anchoring elements implanted in a jawbone, such method including the step wherein the bridge is prepared by casting in a mold made from a casting model, the improvement wherein the casting mode is produced in place on the anchoring elements by the steps of temporarily fastening to each of the plurality of anchoring elements a socket fitted with a prefabricated modular cap, the caps being sized such that a gap is left between adjacent caps, and joining the adjacent caps into a unit.
Claim 3
Dependent Claim
66 words
The improvement according to claim 1 wherein the caps are joined into a unit by applying an adhesive in the gaps between caps, wherein the sockets are of metal and are adapted to form part of the bridge, and wherein the caps and adhesive are of a material adapted to be removed in preparing the mold for the dental bridge, leaving the sockets in the mold.
Claim 4
Dependent Claim
30 words
The improvement according to claim 1 and further comprising the step of sizing the adjacent caps to form gaps between them that are suitable for forming adhesive joints between them.
Claim 5
Dependent Claim
22 words
The improvement according to claim 3 where in the caps are sized by grinding off material at a surface forming the gap.
Claim 6
Dependent Claim
23 words
The improvement according to claim 3 wherein the caps are sized by adhesively bonding spacing elements to them along surfaces adjacent the gaps.
Claim 7
Dependent Claim
75 words
A casting model for use in preparing a mold for a dental bridge of the type that is affixed to a plurality of osseointegrated anchoring elements implanted in a jawbone comprising a plurality of sockets adapted to be removably affixed to the anchoring elements, a prefabricated cap received on each socket and forming a gap with an adjacent socket, and means disposed in the gaps between adjacent caps for joining the caps into a unit.
Claim 8
Dependent Claim
75 words
A casting model for use in preparing a mold for a dental bridge of the type that is affixed to a plurality of osseointegrated anchoring elements implanted in a jawbone comprising a plurality of sockets adapted to be removably affixed to the anchoring elements, a prefabricated cap received on each socket and forming a gap with an adjacent socket, and means disposed in the gaps between adjacent caps for joining the caps into a unit.
Claim 9
Dependent Claim
17 words
A casting model according to claim 6 wherein the means for joining the caps are adhesive joints.
Claim 10
Dependent Claim
35 words
A casting model according to claim 7 wherein the caps and the adhesive of the joints are of materials adapted to be destroyed when the mold for the bridge is made from the casting model.
Claim 11
Dependent Claim
21 words
A casting model according to claim 7 wherein the sockets are metal and are adapted to be cast into the bridge.
Claim 12
Dependent Claim
18 words
A casting model according to claim 9 wherein the caps and the adhesive of the joints are burnable.
Claim 13
Dependent Claim
31 words
A casting model according to claim 6 wherein the caps are selected individually from a supply containing several different sizes such as to form gaps suitable for forming the adhesive joints.
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) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |