Patent US4650418A successfully refreshed from Google Patents.
US4650418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental restoration shading
Assignee: Dentsply Research and Development Corp
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Filing: 1985-04-17
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Granted: 1987-03-17
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Expires: 2005-04-17
Abstract
Abstract A new type of dental prosthetic facing and a new method of preparation of dental prosthetic facings is disclosed. The dental prosthetic facing is provided with an outer shader layer, an intermediate at least substantially uncolored, translucent layer, and an opaque substructure color keyed with the shader layer to match a shade guide. The opaque substructure may be a metal support with a surface opaquing agent in one species. The dental prosthetic facing may be prepared by removably mounting an intermediate uncolored translucent layer that is a crown on a color keyed opaque substructure that is a dental mount. The dental mount being matched to an opaque dental cement that will mount the finished shaded dental crown.
Inventors
- 👤 John J. Blair
- 👤 Roger C. Shue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:31
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0003; A61C5/00; A61C5/70; A61C5/77
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
32 words
A dental prosthetic facing comprising an outer shader layer; an intermediate at least substantially uncolored translucent layer; and an opaque substrate color keyed with said shader layer to match a shade guide.
Claim 2
Dependent Claim
32 words
A dental prosthetic facing comprising an outer shader layer; an intermediate at least substantially uncolored translucent layer; and an opaque substrate color keyed with said shader layer to match a shade guide.
Claim 3
Dependent Claim
19 words
The dental restoration of claim 1 wherein said opaque substructure is a metal support with a surface opaquing agent.
Claim 4
Dependent Claim
25 words
The dental restoration of claim 1 wherein said intermediate uncolored translucent layer is removable mounted on said opaque substructure, said substructure comprising a dental mount.
Claim 5
Dependent Claim
21 words
The dental restoration of claim 1 wherein said substructure comprising an opaque dental cement directly engaging said intermediate uncolored translucent layer.
Claim 6
Dependent Claim
27 words
The dental restoration of claim 4 wherein said dental cement is engaged with a metal support remote from its said engagement with said intermediate uncolored translucent layer.
Claim 7
Dependent Claim
27 words
The dental restoration of claim 4 wherein said dental cement is engaged with a dental stump preparation remote from its engagement with said intermediate uncolored translucent layer.
Claim 8
Dependent Claim
28 words
The dental restoration of claim 1 wherein said intermediate layer is a homogeneous single cast mica glass-ceramic crown member, said outer shader layer comprising a shaded dental porcelain.
Claim 9
Dependent Claim
37 words
The dental restoration of claim 2 wherein said surface opaquing agent is a dental opaque porcelain, said intermediate layer is a homogeneous single layer of dental porcelain and said outer shader layer comprising a shaded dental porcelain.
Claim 10
Dependent Claim
31 words
The dental prosthetic of claim 1 constructed so that when utilized the inner at least substantially uncolored translucent layer is not directly exposed to ambient light in position in a patient.
Claim 11
Dependent Claim
20 words
A dental crown comprising an outer shader layer; and intermediate at least substantially uncolored translucent layer; and an opaque substructure.
Claim 12
Dependent Claim
20 words
A dental crown comprising an outer shader layer; and intermediate at least substantially uncolored translucent layer; and an opaque substructure.
Claim 13
Dependent Claim
24 words
The dental crown of claim 10 wherein upon positioning in a patient said intermediate uncolored translucent layer is not exposed directly to ambient light.
Claim 14
Dependent Claim
19 words
The dental crown of claim 10 wherein said opaque substructure is a metal support with a surface opaquing agent.
Claim 15
Dependent Claim
25 words
The dental crown of claim 10 wherein said intermediate uncolored translucent layer is removable mounted on said opaque substructure, said substructure comprising a dental mount.
Claim 16
Dependent Claim
21 words
The dental crown of claim 10 wherein said substructure comprising an opaque dental cement directly engaging said intermediate uncolored translucent layer.
Claim 17
Dependent Claim
27 words
The dental crown of claim 14 wherein said dental cement is engaged with a metal support remote from its said engagement with said intermediate uncolored translucent layer.
Claim 18
Dependent Claim
27 words
The dental crown of claim 14 wherein said dental cement is engaged with a dental stump preparation remote from its engagement with said intermediate uncolored translucent layer.
Claim 19
Dependent Claim
28 words
The dental crown of claim 10 wherein said intermediate layer is a homogeneous single cast mica glass-ceramic crown member, said outer shader layer comprising a shaded dental porcelain.
Claim 20
Dependent Claim
26 words
The dental crown of claim 17 wherein said substructure comprising an opaque dental cement color keyed with said shaded dental porcelain to match a shade guide.
Claim 21
Dependent Claim
37 words
The dental crown of claim 13 wherein said surface opaquing agent is a dental opaque porcelain, said intermediate layer is a homogeneous single layer of dental porcelain and said outer shader layer comprising a shaded dental porcelain.
Claim 22
Independent Claim
33 words
A method of preparing a dental restoration comprising applying to an opaque dental substrate a translucent layer that is at least substantially free of hue and chroma, and thereafter applying a shader layer.
Claim 23
Independent Claim
33 words
A method of preparing a dental restoration comprising applying to an opaque dental substrate a translucent layer that is at least substantially free of hue and chroma, and thereafter applying a shader layer.
Claim 24
Dependent Claim
18 words
The method of claim 20 wherein said opaque dental substrate comprising opaque cement having hue and substantial chroma.
Claim 25
Dependent Claim
51 words
The method of claim 20 wherein said translucent layer appears white and substantially free of hue and chroma to the unaided eye when viewed unmounted without internal opaque and without shader and when viewed mounted with internal opaque passes the opaque's hue and substantially reduces the chroma of the internal opaque.
Claim 26
Dependent Claim
30 words
The method of preparing a dental restoration of claim 20 wherein said opaque dental substrate is a metal support with an opaque dental cement thereon directly engaging said translucent layer.
Claim 27
Dependent Claim
45 words
The method of preparing a dental restoration of claim 20 wherein said opaque dental substrate is a metal support unit with a dental opaque porcelain thereon, said translucent layer is a homogeneous single layer of dental porcelain and said shader layer comprising shaded dental porcelain.
Claim 28
Dependent Claim
75 words
The method of preparing a dental restoration of claim 20 wherein said translucent layer is removable mounted on said opaque dental substrate, said substrate comprising a dental mount having substantial hue and chroma and said method comprising removing said translucent layer from said dental mount and engaging said translucent layer with a dental cement and thereby a dental stump preparation, said dental cement being matched with the hue and chroma of said opaque dental substrate.
Claim 29
Dependent Claim
30 words
The method of preparing a dental restoration of claim 25 wherein while said translucent layer is on said dental mount, said translucent layer is treated to form said shader layer.
Claim 30
Dependent Claim
35 words
The method of preparing a dental restoration of claim 26 wherein said shaded translucent layer is at least substantially uncolored and translucent throughout except for said shader layer when removed from said opaque dental mount.
Claim 31
Dependent Claim
50 words
The method of claim 27 wherein said translucent layer appears white and substantially free of hue and chroma to the unaided eye when viewed unmounted without internal opaque and without shader and when viewed mounted with internal opaque passes the hue and substantially reduces the chroma of the internal opaque.
Claim 32
Dependent Claim
20 words
The method of preparing a dental restoration of claim 20 wherein said translucent layer has a low hue and chroma.
Claim 33
Independent Claim
55 words
The method of preparing a dental restoration comprising preparing an opaque dental mount; placing a crown on said dental mount, said crown being at least substantially uncolored and translucent throughout; applying shader to said crown and viewing said opaque dental mount while applying said shader; and removing said shaded crown from said opaque dental mount.
Claim 34
Independent Claim
55 words
The method of preparing a dental restoration comprising preparing an opaque dental mount; placing a crown on said dental mount, said crown being at least substantially uncolored and translucent throughout; applying shader to said crown and viewing said opaque dental mount while applying said shader; and removing said shaded crown from said opaque dental mount.
Claim 35
Dependent Claim
42 words
The method of claim 30 wherein said shader is applied as outer layer to said crown and said shaded crown is at least substantially uncolored and translucent throughout except for said outer layer of shader when removed from said opaque dental mount.
Claim 36
Dependent Claim
51 words
The method of claim 31 wherein said opaque dental mount has hue and substantial chroma and comprising mounting said shaded crown on a prepared tooth stump comprising applying opaque cement having substantially the same hue and chroma as said opaque dental mount between said shaded crown and said prepared tooth stump.
Claim 37
Dependent Claim
49 words
The method of claim 32 wherein said crown appears white and substantially free of hue and chroma to the unaided eye when viewed unmounted without internal opaque and without shader and when viewed mounted with internal opaque passes the hue and substantially reduces the chroma of the internal opaque.
Claim 38
Dependent Claim
18 words
The method of claim 32 wherein said dental mount is a master model of said prepared tooth stump.
Claim 39
Dependent Claim
11 words
The method of claim 30 wherein said crown comprising mica glass-ceramic.
Claim 40
Dependent Claim
51 words
The method of claim 31 wherein said opaque dental mount has hue and substantial chroma and comprising mounting said shaded crown on a metal base member comprising applying opaque material having substantially the same hue and chroma as said opaque dental mount between said shaded crown and said metal base member.
Claim 41
Independent Claim
62 words
The method of preparing a dental restoration comprising in sequence, first preparing a supporting base substrate, next opaquing at least a portion of said base substrate, then applying a layer of at least substantially hue free, translucent material to at least a portion of said opaqued base substrate, thereafter applying a shader to said translucent material remote from said opaqued base substrate.
Claim 42
Independent Claim
62 words
The method of preparing a dental restoration comprising in sequence, first preparing a supporting base substrate, next opaquing at least a portion of said base substrate, then applying a layer of at least substantially hue free, translucent material to at least a portion of said opaqued base substrate, thereafter applying a shader to said translucent material remote from said opaqued base substrate.
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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) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |