EP0323120A2
Expired / Lapsed
EP
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Photocurable ionomer cement systems
Assignee: 3M Co
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Filing: 1988-12-21
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Granted: —
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Expires: 2008-12-21
Abstract
Abstract A dental cement system containing a photocurable ionomer, reactive powder and water undergoes both a conventional setting reaction and a photocuring reaction. The cement system can provide a long working time and can be cured on demand by exposure to an appropriate source of radiant energy. The surface of the cement cured in this manner is then hard enough to allow subsequent clinical procedures to be performed, while the ongoing chemical-cure "setting" reaction hardens the remainder of the cement.
Inventors
- 👤 Sumita B. C/O Minnesota Mining Mitra
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 09:48
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/38; C04B7/42; A; A61; A61K; A61K6/00; A61K6/60; A61K6/62; A61K6/20; A61K6/30; A61K6/50; A61K6/54; A61K6/80; A61K6/884; A61K6/887; A61K6/889; A61K6/891; A61K6/893
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
51 words
A photocurable ionomer cement system comprising (a) a photocurable ionomer having sufficient pendent ionic groups to undergo a setting reaction in the presence of a reactive powder and water and sufficient pendent polymerizable groups to enable the resulting mixture to be cured by exposure to radiant energy, and (b) reactive powder.
Claim 2
Dependent Claim
51 words
A photocurable ionomer cement system comprising (a) a photocurable ionomer having sufficient pendent ionic groups to undergo a setting reaction in the presence of a reactive powder and water and sufficient pendent polymerizable groups to enable the resulting mixture to be cured by exposure to radiant energy, and (b) reactive powder.
Claim 3
Dependent Claim
25 words
A photocurable ionomer cement system according to claim 1 further comprising water, present in a form that does not prematurely begin to set the system.
Claim 4
Dependent Claim
38 words
A photocurable ionomer cement system according to claim 2 wherein said water is present in the form of an aqueous solution of said ionomer, and said powder is provided as a separate component for mixing with said solution.
Claim 5
Dependent Claim
36 words
A photocurable ionomer cement system according to claim 2 wherein said ionomer and said reactive powder are present as an anhydrous mixture and said water is provided as a separate component for mixing with said mixture.
Claim 6
Dependent Claim
15 words
A photocurable ionomer cement system according to claim 1 further comprising polymerization initiator and cosolvent.
Claim 7
Dependent Claim
26 words
A photocurable ionomer cement system according to claim 1 further comprising modifying agent selected from the group consisting of alkanolamines, and mono-, di-, and tri-sodium hydrogenphosphates.
Claim 8
Dependent Claim
83 words
A photocurable ionomer cement system comprising (a) a photocurable ionomer of the formula B(X) m (Y) n I <wherein B represents an organic backbone; each X independently is an ionic group capable of undergoing a setting reaction in the presence of water and a reactive powder, each Y independently is a photocurable group, m is a number having an average value of 2 or more, and n is a number having an average value of 1 or more, and (b) a reactive powder.
Claim 9
Dependent Claim
83 words
A photocurable ionomer cement system comprising (a) a photocurable ionomer of the formula B(X) m (Y) n I <wherein B represents an organic backbone; each X independently is an ionic group capable of undergoing a setting reaction in the presence of water and a reactive powder, each Y independently is a photocurable group, m is a number having an average value of 2 or more, and n is a number having an average value of 1 or more, and (b) a reactive powder.
Claim 10
Independent Claim
58 words
A method for preparing a cured ionomer cement comprising the steps of (a) mixing a photocurable ionomer, a reactive powder, and water to begin a setting reaction, (b) forming the resultant mixture into its desired shape, (c) curing the resultant shaped mixture by exposure to radiant energy, and (d) allowing said setting reaction to harden said mixture fully.
Claim 11
Independent Claim
58 words
A method for preparing a cured ionomer cement comprising the steps of (a) mixing a photocurable ionomer, a reactive powder, and water to begin a setting reaction, (b) forming the resultant mixture into its desired shape, (c) curing the resultant shaped mixture by exposure to radiant energy, and (d) allowing said setting reaction to harden said mixture fully.
Claim 12
Dependent Claim
73 words
A cured ionomer cement prepared by curing by exposure to radiant energy a photocurable ionomer cement system, said cement system comprising an intimate mixture of (a) a photocurable ionomer having sufficient pendent ionic groups to undergo a setting reaction in the presence of a reactive powder and water and sufficient pendent ethylenically unsaturated groups to enable the resulting mixture to be cured by exposure to radiant energy, (b) reactive powder, and (c) water.
Claim 13
Dependent Claim
73 words
A cured ionomer cement prepared by curing by exposure to radiant energy a photocurable ionomer cement system, said cement system comprising an intimate mixture of (a) a photocurable ionomer having sufficient pendent ionic groups to undergo a setting reaction in the presence of a reactive powder and water and sufficient pendent ethylenically unsaturated groups to enable the resulting mixture to be cured by exposure to radiant energy, (b) reactive powder, and (c) water.
Claim 14
Dependent Claim
130 words
A photocurable ionomer of the formula B(X) m (Y) n wherein B represents an organic backbone; each X independently is an ionic group capable of undergoing a setting reaction in the presence of water and a reactive powder, each Y independently is a photocurable group, m is a number having an average value of 2 or more, and n is a number having an average value of 1 or more, wherein at least one of said Y groups is linked to said backbone by means of an amide linkage formed by reacting an X group of the formula -COOH of a polymer of the formula B(X) m+n with a coupling compound containing both said Y group and a group of the formula -NCO capable of reacting with said X group.
Claim 15
Dependent Claim
130 words
A photocurable ionomer of the formula B(X) m (Y) n wherein B represents an organic backbone; each X independently is an ionic group capable of undergoing a setting reaction in the presence of water and a reactive powder, each Y independently is a photocurable group, m is a number having an average value of 2 or more, and n is a number having an average value of 1 or more, wherein at least one of said Y groups is linked to said backbone by means of an amide linkage formed by reacting an X group of the formula -COOH of a polymer of the formula B(X) m+n with a coupling compound containing both said Y group and a group of the formula -NCO capable of reacting with said X group.
References Cited (Backward Citations)
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