USRE33271E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental jacket crown, coping and method of construction
Assignee: Itzhak Shoher
•
Filing: 1985-12-06
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Granted: 1990-07-24
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Expires: 2005-12-06
Abstract
Abstract The dental jacket crown of the present invention is prepared from a thin metal foil substrate which is coated with a noble based metal composition having a low fusing temperature and folded in a predetermined manner to form multiple folds in the form of triangular like flaps or pleats. The folded foil represents the coping of the present invention. The coping is mounted over a die of the prepared tooth and the flaps wrapped in overlapping formation and then adapted to the die. The die is removed and the structure heated preferably under a bunsen burner. A bonding material may be coated over the free standing structure if desired. A veneering material such as porcelain is then coated over the structure to form the crown.
Inventors
- 👤 Itzhak Shoher
- 👤 Aharon Whiteman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:33
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0003; A61C5/00; A61C5/70; A61C5/77
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
A .Iadd.dental .Iaddend.jacket crown comprising a composite body .[.including.]. .Iadd.formed from .Iaddend.a thin foil of high fusing temperature metal, .[.substantially of platinum.]. having a surface geometry conforming to a die to which it has been adapted with the foil having .[.a minimum of at least three folded over pleats in a substantial symmetrical arrangement around the body of a foil with each pleat forming a triangular like flap in the unfolded position and wherein said foil has.]. .Iadd.arranged about .Iaddend.an unfolded area substantially in the center of the foil .[.body with said foil having.]. .Iadd.and .Iaddend.at least one thin coated layer of a gold based noble metal composition of up to 100% gold superimposed over one surface of said .[.thin foil and disposed beneath the folded over pleats.]. .Iadd.high fusing temperature metal .Iaddend.and a relatively thick outer coating of a dental veneering material.
Claim 2
Dependent Claim
143 words
A .Iadd.dental .Iaddend.jacket crown comprising a composite body .[.including.]. .Iadd.formed from .Iaddend.a thin foil of high fusing temperature metal, .[.substantially of platinum.]. having a surface geometry conforming to a die to which it has been adapted with the foil having .[.a minimum of at least three folded over pleats in a substantial symmetrical arrangement around the body of a foil with each pleat forming a triangular like flap in the unfolded position and wherein said foil has.]. .Iadd.arranged about .Iaddend.an unfolded area substantially in the center of the foil .[.body with said foil having.]. .Iadd.and .Iaddend.at least one thin coated layer of a gold based noble metal composition of up to 100% gold superimposed over one surface of said .[.thin foil and disposed beneath the folded over pleats.]. .Iadd.high fusing temperature metal .Iaddend.and a relatively thick outer coating of a dental veneering material.
Claim 3
Dependent Claim
37 words
A jacket crown as defined in claim 1 wherein each .[.of the folds.]. .Iadd.fold .Iaddend.is arranged .[.substantially circumferentially around a central.]. .Iadd.about an .Iaddend.axis extending vertically through said unfolded area in the center of the foil body.
Claim 4
Dependent Claim
38 words
A jacket crown as defined in claim 2 wherein said gold based noble metal composition comprises substantially gold and at least one of the following elements selected from the group consisting of: silver, palladium, iridium, copper and aluminum.
Claim 5
Dependent Claim
17 words
A jacket crown as defined in claim 1 wherein said folded over .[.pleats.]. .Iadd.sections .Iaddend.overlap one another.
Claim 6
Dependent Claim
149 words
A dental coping for a jacket crown restoration comprising a thin foil .[.of.]. .Iadd.having a layer of a .Iaddend.high fusing temperature metal .Iadd.and a layer of a gold based noble metal composition of up to 100% gold superimposed upon the surface of said high fusing temperature metal layer with said foil having a round geometry when unfolded and .Iaddend.arranged in a prefolded geometrical configuration with an unfolded central area .[.wherein the prefolded geometry includes a minimum of at least three pleated sections substantially symmetrically disposed around the central area with each pleated section represented by fold lines which form a triangular like flap and at least one coated layer of a gold based noble metal composition of up to 100% gold superimposed upon the surface of said thin foil and disposed beneath the folded over pleats..]. .Iadd.and at least two folded over sections extending from the central area. .Iaddend.
Claim 7
Dependent Claim
149 words
A dental coping for a jacket crown restoration comprising a thin foil .[.of.]. .Iadd.having a layer of a .Iaddend.high fusing temperature metal .Iadd.and a layer of a gold based noble metal composition of up to 100% gold superimposed upon the surface of said high fusing temperature metal layer with said foil having a round geometry when unfolded and .Iaddend.arranged in a prefolded geometrical configuration with an unfolded central area .[.wherein the prefolded geometry includes a minimum of at least three pleated sections substantially symmetrically disposed around the central area with each pleated section represented by fold lines which form a triangular like flap and at least one coated layer of a gold based noble metal composition of up to 100% gold superimposed upon the surface of said thin foil and disposed beneath the folded over pleats..]. .Iadd.and at least two folded over sections extending from the central area. .Iaddend.
Claim 8
Dependent Claim
38 words
A dental coping for a jacket crown as defined in claim 5 wherein said .[.pleated.]. sections are .[.arranged substantially circumferentially around a central axis extending through said unfolded area in the center of the foil body..]. .Iadd.pleated. .Iaddend.
Claim 9
Dependent Claim
17 words
A dental coping as defined in claim 5 wherein said folded over .[.pleats.]. sections overlap one another.
Claim 10
Independent Claim
166 words
A method of forming a dental jacket crown comprising the steps of: preparing a thin metal foil of high fusing temperature metal into a substantially circular substrate; coating one surface of the foil substrate with at least one layer of a gold based noble metal composition of up to 100% gold with a lower fusing temperature than that of the metal foil substrate; forming .[.at least three pleats.]. .Iadd.a plurality of folded over sections, .Iaddend.in said coated foil substrate around an unfolded area disposed substantially in the center of the circular foil; mounting said coated foil substrate over a die of the prepared tooth with the coated surface exposed and with the unfolded area above the occlusal end of the die; adapting said foil to said die; removing said die for providing an inner structure for said jacket crown; heating said inner structure above the low fusing temperature of said noble based gold composition; and coating a fired on .[.porcelain.]. veneering material over said inner structure.
Claim 11
Independent Claim
166 words
A method of forming a dental jacket crown comprising the steps of: preparing a thin metal foil of high fusing temperature metal into a substantially circular substrate; coating one surface of the foil substrate with at least one layer of a gold based noble metal composition of up to 100% gold with a lower fusing temperature than that of the metal foil substrate; forming .[.at least three pleats.]. .Iadd.a plurality of folded over sections, .Iaddend.in said coated foil substrate around an unfolded area disposed substantially in the center of the circular foil; mounting said coated foil substrate over a die of the prepared tooth with the coated surface exposed and with the unfolded area above the occlusal end of the die; adapting said foil to said die; removing said die for providing an inner structure for said jacket crown; heating said inner structure above the low fusing temperature of said noble based gold composition; and coating a fired on .[.porcelain.]. veneering material over said inner structure.
Claim 12
Dependent Claim
34 words
A method as defined in claim 8 wherein said .[.pleats substantially circumferentially around.]. .Iadd.folded over sections are arranged about .Iaddend.a central axis extending vertically through said unfolded area in the center of the foil.
Claim 13
Dependent Claim
143 words
A method as defined in claim 8 wherein each pleat is of a size such that upon folding it will.]. .Iadd.folded over section is folded to overlap an adjacent .[.pleat.]. .Iadd.section. .Iaddend. .Iadd.11. A method of forming a dental coping from a metal foil having a high fusing temperature metal layer and a superimposed layer of a low fusing gold based noble metal composition of up to 100% gold, prefolding said foil to form a plurality of folded over sections extending from an unfolded central area, adapting said foil to a die of a tooth upon which said jacket crown is to be formed, removing said foil from said die and heating said foil to a temperature above the melting temperature of said low fusing gold based noble metal layer to cause the gold layer to melt for forming a composite structure. .Iaddend.
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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) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |