EP0255286A2
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EP
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Visible light-cured impression material
Assignee: Kerr Corp
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Filing: 1987-07-22
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Granted: —
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Expires: 2007-07-22
Abstract
Abstract A dental impression material comprises a pre-polymer formed by reacting a polyol or polyester polyol, a diisocyante, and a hydroxyacrylate or methacrylate, along with a metal catalyst, plasticizer, photosensitizer, reducing agent, filler and other additives. The resultant polymer portion is a long-chain aliphatic polyester-polyurethane molecule, which when end-capped with hydroxyacrylate moieties, is photo-polymerizable to yield a tear-resistant highly flexible medium-durometer elastomer, suitable for use as a dental impression material.
Inventors
- 👤 Narayanan Madhavan
- 👤 Carole Landry Groh
- 👤 Robert Louis Probst
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 22:59
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/035; A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
62 words
A photopolymerizable elastomeric impression material, characterized by comprising a one-component formulation which includes: (a) a pre-polymer formed by reacting a polyol or polyester polyol, a diisocyanate and a hydroxyacrylate or methacrylate; (b) a metal catalyst; (c) a plasticizer; (d) a photosensitizer: (e) a reducing agent; (f) a filler; and (g) an antioxidant, a surfactant, a low-melting wax and a dye or pigment.
Claim 2
Dependent Claim
62 words
A photopolymerizable elastomeric impression material, characterized by comprising a one-component formulation which includes: (a) a pre-polymer formed by reacting a polyol or polyester polyol, a diisocyanate and a hydroxyacrylate or methacrylate; (b) a metal catalyst; (c) a plasticizer; (d) a photosensitizer: (e) a reducing agent; (f) a filler; and (g) an antioxidant, a surfactant, a low-melting wax and a dye or pigment.
Claim 3
Dependent Claim
39 words
An impression material according to claim 1, comprising in weight per cent: 20-65% of the pre-polymer, 0.01-1.0% of the metal catalyst, 20-50% of the plasticizer, 0.1-1.0% of the photosensitizer, 0.1-1.0% of the reducing agent, and 5-20% of the filler.
Claim 4
Dependent Claim
33 words
An impression material according to claim 2, which further includes, in weight per cent: 0.01-1.0% of the antioxidant 0.05-2.0% of the surfactant 0.1-4.0% of the wax, and 0.01-2.0% of the dye or pigment.
Claim 5
Dependent Claim
11 words
An impression material according to claim 1, 2 or 3, comprising:
Claim 6
Dependent Claim
15 words
An impression material according to claim 4, wherein the silica is a synthetic submicron silica.
Claim 7
Dependent Claim
17 words
An impression material according to claim 4 or 5, wherein the silica is a synthetic micronized silica.
Claim 8
Dependent Claim
19 words
An impression material according to claim 4, wherein the silica is a combination of synthetic submicron and micronized silica.
Claim 9
Dependent Claim
25 words
An impression material according to any of claims 4 to 7, which contains an antioxidant in a concentration in the range from 0.01-1.0 weight percent.
Claim 10
Dependent Claim
15 words
An impression material according to any of claims 4 to 8, which contains a surfactant.
Claim 11
Dependent Claim
26 words
An impression material according to any of claims 4 to 9, which contains a low-melting wax in a concentration in the range from 0.1-4.0 weight percent.
Claim 12
Dependent Claim
27 words
An impression material according to any of claims 4 to 10, which contains a dye or pigment in a concentration in the range from 0.01-2.0 weight percent.
Claim 13
Dependent Claim
19 words
An impression material according to any preceding claim, wherein the filler/plasticizer ratio is adjusted to provide a multiviscosity system.
Claim 14
Independent Claim
50 words
A method of manufacture of a dental impression, which comprises placing an impression material according to any preceding claim in a light-transmitting dental impression tray, properly seating the tray in a patient's mouth and exposing the tray to visible light for 5 minutes or less to cure the impression material.
Claim 15
Dependent Claim
53 words
A dental impression, characterised in that it is made by placing an impression material according to any of claims 1 to 12, in a light-transmitting dental impression tray, properly seating the tray in a patient's mouth and exposing the tray to visible light for 5 minutes or less to cure the impression material.
References Cited (Backward Citations)
No citation records indexed.
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