Patent US4740159A successfully refreshed from Google Patents.
US4740159A
Expired / Lapsed
US
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Method for making a dental impression
Assignee: Kerr Corp
•
Filing: 1987-07-17
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Granted: 1988-04-26
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Expires: 2007-07-17
Abstract
Abstract A method of forming a two step dental impression which comprises applying a light curable impression material to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of activating light to set said impression material followed by applying a chemically cured impression material over said light cured impression material and allowed said chemically cured impression material to set and bond with said light curable material and removing the resulting composite impression from said oral cavity.
Inventors
- 👤 James C. Hamilton
- 👤 Duncan E. Waller
- 👤 Christina L. Semkow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:37
CPC Classifications
A; A61; A61C; A61C9/00; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
A method of forming a two step dental impression which comprises: (a) applying a light curable impression material to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of activating light to set said impression material; (b) applying a chemically cured impression material over said light cured impression material and allowed said chemically cured impression material to set and bond with said light curable material; and (c) removing the resulting composite impression from said oral cavity.
Claim 2
Independent Claim
88 words
A method of forming a two step dental impression which comprises: (a) applying a light curable impression material to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of activating light to set said impression material; (b) applying a chemically cured impression material over said light cured impression material and allowed said chemically cured impression material to set and bond with said light curable material; and (c) removing the resulting composite impression from said oral cavity.
Claim 3
Independent Claim
99 words
A method of forming a composite dental impression which comprises: (a) applying a light curable impression material to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of activating light to at least partially set said impression material; (b) placing a chemically cured impression material in a dental tray and seating said tray over said light cured impression material and allowed said chemically cured impression material to set and bond with said light curable material; and (c) removing the resulting two step impression from said oral cavity.
Claim 4
Independent Claim
99 words
A method of forming a composite dental impression which comprises: (a) applying a light curable impression material to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of activating light to at least partially set said impression material; (b) placing a chemically cured impression material in a dental tray and seating said tray over said light cured impression material and allowed said chemically cured impression material to set and bond with said light curable material; and (c) removing the resulting two step impression from said oral cavity.
Claim 5
Independent Claim
101 words
A method of forming a two step dental impression which comprises: (a) applying a light curable impression material to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of visible light in the range of about 370 to 550 nanometers to at least partially set said impression material; (b) applying a chemically cured impression material over said light cured impression material and allowing said chemically cured impression material to set and bond with said light curable material; and (c) removing the resulting two step impression from said oral cavity.
Claim 6
Independent Claim
101 words
A method of forming a two step dental impression which comprises: (a) applying a light curable impression material to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of visible light in the range of about 370 to 550 nanometers to at least partially set said impression material; (b) applying a chemically cured impression material over said light cured impression material and allowing said chemically cured impression material to set and bond with said light curable material; and (c) removing the resulting two step impression from said oral cavity.
Claim 7
Independent Claim
100 words
A method of forming a two step dental impression which comprises: (a) applying a light curable impression material to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of visible light to at least partially set said impression material; (b) placing a chemically cured impression material in a dental tray and seating said tray over said light cured impression material and allowed said chemically cured impression material to set and bond with said light curable material; and (c) removing the resulting two step impression from said oral cavity.
Claim 8
Independent Claim
100 words
A method of forming a two step dental impression which comprises: (a) applying a light curable impression material to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of visible light to at least partially set said impression material; (b) placing a chemically cured impression material in a dental tray and seating said tray over said light cured impression material and allowed said chemically cured impression material to set and bond with said light curable material; and (c) removing the resulting two step impression from said oral cavity.
Claim 9
Independent Claim
135 words
A method of forming a two step dental impression which comprises: (a) applying a light curable impression material which is an adduct of a long chain aliphatic polyester polyol with an alyphatic diisocyanate, endcapped with a hydroxy functional acrylate or methacrylate, and modified by the incorporation of photosensitizing components, plasticizers, fillers, pigments, tack reducing additives and stabilizers to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of activating light to at least partially set said impression material; (b) applying a chemically cured two component acrylic functional impression material over said light cured impression material and allowed said chemically cured impression material to set and bond with said light curable material; and (c) removing the resulting two step impression from said oral cavity.
Claim 10
Independent Claim
135 words
A method of forming a two step dental impression which comprises: (a) applying a light curable impression material which is an adduct of a long chain aliphatic polyester polyol with an alyphatic diisocyanate, endcapped with a hydroxy functional acrylate or methacrylate, and modified by the incorporation of photosensitizing components, plasticizers, fillers, pigments, tack reducing additives and stabilizers to a portion of the oral cavity of interest to form an initial impression while exposing said impression material to a source of activating light to at least partially set said impression material; (b) applying a chemically cured two component acrylic functional impression material over said light cured impression material and allowed said chemically cured impression material to set and bond with said light curable material; and (c) removing the resulting two step impression from said oral cavity.
Claim 11
Dependent Claim
67 words
The method of claim 5 in which the two component impression material comprises base and catalyst pastes of the following broad description, mixed in a suitable ratio: ______________________________________
WT. %
______________________________________
BASE PASTE
Difunctional urethane methacrylate prepolymer
30-60
Diluent acrylic functional monomer
3-15
Acrylic functional tertiary amine
0.2-5.0
Filler(s) 20-70
Pigment(s) 0.1-3.0
CATALYST PASTE
Acrylic functional crosslinking monomer
30-60
Acyl peroxide 0.5-10.0
Filler(s) 20-70
Inhibitor/stabilizer 0.01-0.5
______________________________________
Claim 12
Dependent Claim
110 words
The method of claim 1 in which the light curable impression material comprises an adduct of a long chain aliphatic polyester polyol with an aliphatic diisocyanate, endcapped with a hydroxy functional acrylate or methacrylate, and modified by the incorporation of photosensitizing components, plasticizers, fillers, pigments, tack reducing additives and stabilizers and the chemically curable impression material comprises base and catalyst pastes of the following description, mixed in a suitable ratio: ______________________________________
WT. %
______________________________________
BASE PASTE
Difunctional urethane methacrylate prepolymer
30-60
Diluent acrylic functional monomer
3-15
Acrylic functional tertiary amine
0.2-5.0
Filler(s) 20-70
Pigment(s) 0.1-3.0
CATALYST PASTE
Acrylic functional crosslinking monomer
30-60
Acyl peroxide 0.5-10.0
Filler(s) 20-70
Inhibitor/stabilizer 0.01-0.5
______________________________________
References Cited (Backward Citations)
US4468202A
Cited
US4543063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |