US4674980A — Dental composite and porcelain repair

Claim 1

Independent Claim 168 words

A filled-resin composition useful for porcelain repair and as a dental composite and therefore made up of non-toxic materials, comprising: a methacrylate functional resin usable in dental composites, powdered filler-colorant therein, at least one photoinitiator for said resin in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5,000 foot candles, while insufficient to result in curing when exposed for thirty minutes, to the light normally present in a lighted dental operatory, so as to afford a dentist adequate time for mixing, changing the coloring, and placement in a patient's mouth, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, and at least one accelerator-free peroxide curing agent for said resin in an effective amount for slowly completing polymerization within about an hour of any portion of said resin not receiving sufficient light to effectuate complete cure before then.

Claim 2

Dependent Claim 168 words

A filled-resin composition useful for porcelain repair and as a dental composite and therefore made up of non-toxic materials, comprising: a methacrylate functional resin usable in dental composites, powdered filler-colorant therein, at least one photoinitiator for said resin in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5,000 foot candles, while insufficient to result in curing when exposed for thirty minutes, to the light normally present in a lighted dental operatory, so as to afford a dentist adequate time for mixing, changing the coloring, and placement in a patient's mouth, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, and at least one accelerator-free peroxide curing agent for said resin in an effective amount for slowly completing polymerization within about an hour of any portion of said resin not receiving sufficient light to effectuate complete cure before then.

Claim 3

Dependent Claim 13 words

The composition of claim 1 wherein said peroxide curing agent is benzoyl peroxide.

Claim 4

Dependent Claim 112 words

The composition of claim 1 wherein each said photoinitiator is an exciplex chosen from the group consising of: 2,3-Bornanedione with ethyl-4-dimethyl amino benzoate 2,3-Bornanedione with ethyl-2-dimethyl amino benzoate Benzil with ethyl-4-dimethyl amino benzoate Benzil with ethyl-2-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-4-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-2-dimethyl amino benzoate Dibenzyl ketone with ethyl-4-dimethyl amino benzoate Dibenzyl ketone with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-2-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-4-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-2-dimethyl amino benzoate Benzoin methyl ether with ethyl-4-dimethyl amino benzoate Benzoin methyl ether with ethyl-2-dimethyl amino benzoate.

Claim 5

Dependent Claim 34 words

The composition of claim 1 wherein the resin is at least one resin chosen from the group consisting of ethoxylated bisphenol-A-dimethacrylate, Bis-GMA, and an adduct of 2,2'-propane bis[3-(4-phenoxy)-1,2-hydroxy propane-1 methacrylate] and mono- or di-isocyanate.

Claim 6

Dependent Claim 25 words

The composition of claim 1, wherein said peroxide curing agent is benzoyl peroxide, the carbocyclic ingredient is 2,3-bornanedione, and said benzoate is ethyl-4-dimethyl amino benzoate.

Claim 7

Dependent Claim 158 words

A two-part system for making a filled methacrylate-functional resin composition by mixture of the two parts, comprising: first part: dental-type filler powder with an accelerator-free peroxide curing agent for said resin, second part: dental-type methacrylate-functional resin with photoinitiator therefor, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, in an amount sufficient to initiate polymerization and complete it within about half a minute after the first part and second parts are mixed and then exposed during cure to at least 5,000 foot candles visible light, while insufficient to result in curing, when exposed, for thirty minutes in a lighted dental operatory, so as to afford a dentist adequate time for mixing, adjusting, and placement in a patient's mouth, said peroxide curing agent being present in an amount effective to complete cure of any resin portion not sufficiently exposed to said light within about an hour.

Claim 8

Dependent Claim 158 words

A two-part system for making a filled methacrylate-functional resin composition by mixture of the two parts, comprising: first part: dental-type filler powder with an accelerator-free peroxide curing agent for said resin, second part: dental-type methacrylate-functional resin with photoinitiator therefor, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, in an amount sufficient to initiate polymerization and complete it within about half a minute after the first part and second parts are mixed and then exposed during cure to at least 5,000 foot candles visible light, while insufficient to result in curing, when exposed, for thirty minutes in a lighted dental operatory, so as to afford a dentist adequate time for mixing, adjusting, and placement in a patient's mouth, said peroxide curing agent being present in an amount effective to complete cure of any resin portion not sufficiently exposed to said light within about an hour.

Claim 9

Dependent Claim 16 words

The system of claim 6 wherein the first part is in the form of a powder.

Claim 10

Dependent Claim 16 words

The system of claim 7 wherein the second part is in the form of a liquid.

Claim 11

Dependent Claim 19 words

The system of claim 8 wherein the powder to liquid weight ratio is from about 1:1 to about 4:1.

Claim 12

Dependent Claim 21 words

The system of claim 7 wherein the second part is in the form of a gel and also contains some filler.

Claim 13

Dependent Claim 17 words

The system of claim 10 wherein the powder-gel weight ratio is from about 1:20 to about 3:1.

Claim 14

Dependent Claim 22 words

The system of claim 6 wherein both the first and second parts are in paste form, both containing substantial amounts of filler.

Claim 15

Dependent Claim 27 words

The system of claim 12 wherein the first and second parts are so formulated to enable mixture of equal parts by weight at the time of use.

Claim 16

Dependent Claim 33 words

The system of claim 6 wherein the resin is at least one resin chosen from the group consisting of ethoxylated bisphenol-A-dimethacrylate and an adduct of 2,2'-propane bis[3-(4-phenoxy)-1,2-hydroxy propane-1 methacrylate] and mono- or di-isocyanate.

Claim 17

Dependent Claim 13 words

The system of claim 14 wherein said peroxide curing agent is benzoyl peroxide.

Claim 18

Dependent Claim 106 words

The system of claim 14 wherein each said photoinitiator is chosen from the group consisting of: 2,3-Bornanedione with ethyl-4-dimethyl amino benzoate 2,3-Bornanedione with ethyl-2-dimethyl amino benzoate Benzil with ethyl-4-dimethylaminobenzoate Benzil with ethyl-2-dimethylaminobenzoate 2-Isopropyl thioxanthone with ethyl-4-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-2-dimethyl amino benzoate Dibenzyl ketone with ethyl-4-dimethyl amino benzoate Dibenzyl ketone with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-2-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-4-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-2-dimethyl amino benzoate Benzoin methyl ether with ethyl-4-dimethyl amino benzoate Benzoin methyl ether with ethyl-2-dimethyl amino benzoate.

Claim 19

Dependent Claim 25 words

The system of claim 6, wherein said peroxide curing agent is benzoyl peroxide, the carbocyclic ingredient is 2,3-bornanedione, and said benzoate is ethyl-4-dimethyl amino benzoate.

Claim 20

Dependent Claim 197 words

A porcelain-repair and dental composite composition of matter consisting essentially of a powder component consisting essentially by weight of: Dental filler-colorant material: 99.85% to 97.7% Gamma-methacryloxy propyl trimethoxy silane: 0.10% to 1.55%, Peroxide curing agent: 0.05% to 0.70%, Glacial acetic acid: 0 to 0.05%, and a liquid component consisting essentially, by weight of: a methacrylate-functional resin suitable for use in dental composites: 99.3% to 82%, exciplex-forming photoinitiator for said resin: 0.7% to 18%, said powder and resin being mixed together in a weight ratio between 1:1 and 4:1 of powder to liquid, said photoinitiator being at least one item chosen from the group consisting of: 2,3-Bornanedione with ethyl-4-dimethyl amino benzoate 2,3-Bornanedione with ethyl-2-dimethyl amino benzoate Benzil with ethyl-4-dimethyl amino benzoate Benzil with ethyl-2-dimethylaminobenzoate 2-Isopropyl thioxanthone with ethyl-4-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-2-dimethyl amino benzoate Dibenzyl ketone with ethyl-4-dimethyl amino benzoate Dibenzyl ketone with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-2-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-4-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-2-dimethyl amino benzoate Benzoin methyl ether with ethyl-4-dimethyl amino benzoate Benzoin methyl ether with ethyl-2-dimethyl amino benzoate.

Claim 21

Dependent Claim 197 words

A porcelain-repair and dental composite composition of matter consisting essentially of a powder component consisting essentially by weight of: Dental filler-colorant material: 99.85% to 97.7% Gamma-methacryloxy propyl trimethoxy silane: 0.10% to 1.55%, Peroxide curing agent: 0.05% to 0.70%, Glacial acetic acid: 0 to 0.05%, and a liquid component consisting essentially, by weight of: a methacrylate-functional resin suitable for use in dental composites: 99.3% to 82%, exciplex-forming photoinitiator for said resin: 0.7% to 18%, said powder and resin being mixed together in a weight ratio between 1:1 and 4:1 of powder to liquid, said photoinitiator being at least one item chosen from the group consisting of: 2,3-Bornanedione with ethyl-4-dimethyl amino benzoate 2,3-Bornanedione with ethyl-2-dimethyl amino benzoate Benzil with ethyl-4-dimethyl amino benzoate Benzil with ethyl-2-dimethylaminobenzoate 2-Isopropyl thioxanthone with ethyl-4-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-2-dimethyl amino benzoate Dibenzyl ketone with ethyl-4-dimethyl amino benzoate Dibenzyl ketone with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-2-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-4-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-2-dimethyl amino benzoate Benzoin methyl ether with ethyl-4-dimethyl amino benzoate Benzoin methyl ether with ethyl-2-dimethyl amino benzoate.

Claim 22

Dependent Claim 151 words

The porcelain-repair and dental composite composition of matter of claim 18 wherein: said filler-colorant consists essentially by weight of ingredients totaling as in claim 16 and selected from the group consisting of: Barium glass: 0% to 30%, Lithium aluminum silicate: 0% to 99.85%, Flint silica: 0% to 10%, Borosilicate glass: 0% to 99.85%, Fumed synthetic silica: 0% to 99.85%, Quartz: 0% to 99.85%, Custer feldspar: 0% to 10%, said powder component also including, in addition to the silane, the peroxide curing agent, and the glacial acetic acid: Titanium dioxide: 0% to 0.15%, Metal salts: 0% to 5.00%, said methacrylate-functional resin totaling as in claim 16 and consisting essentially by weight of ingredients: Bis-GMA: 0% to 80%, Ethoxylated bisphenol-A-dimethacrylate: 0% to 99%, Ethylene glycol dimethacrylate 0% to 60%, Diethylene glycol dimethacrylate 0% to 60%, Triethylene glycol dimethacrylate 0% to 60%, Polyethylene glycol dimethacrylate 0% to 60%, Exciplex forming photoinitiator 0.7% to 18%.

Claim 23

Dependent Claim 13 words

The composition of claim 18 wherein said peroxide curing agent is benzoyl peroxide.

Claim 24

Dependent Claim 25 words

The composition of claim 18, wherein said peroxide curing agent is benzoyl peroxide, and said photoinitiator is an exciplex of 2,3-bornanedione and ethyl-4-dimethyl amino benzoate.

Claim 25

Dependent Claim 187 words

A porcelain-repair and dental composite restorative material consisting essentially of: (a) a powder component, consisting essentially of a powdered dental filler-colorant, with a powdered peroxide curing agent in an amount between 0.05% and 1% by weight of said powder component, and (b) a liquid component, consisting essentially of (1) a methacrylate-functional resin suitable for use in dental composites in an amount of 84-96% by weight of said liquid component, and (2) a photoinitiator for said resin consisting of an exciplex incorporating as one ingredient either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate in an amount of about 0.7 to 10% by weight of said liquid component, the other ingredient being present in an amount of 0.01-8%, by weight of said liquid component, for a total photoinitiator amount by weight of said liquid component of about 0.7 to 18%, said other ingredient of said exciplex being a single compound selected from the group consisting of 2,3-bornanedione, 2-isopropyl thioxanthone, dimethoxy acetophenone, benzil dimethyl acetal, and 2-hydroxy-2-methyl-1-phenyl-propan-1-one, said powder and liquid components being mixed together just before use in a weight ratio of from 2:1 to 31/2 powder to liquid.

Claim 26

Dependent Claim 187 words

A porcelain-repair and dental composite restorative material consisting essentially of: (a) a powder component, consisting essentially of a powdered dental filler-colorant, with a powdered peroxide curing agent in an amount between 0.05% and 1% by weight of said powder component, and (b) a liquid component, consisting essentially of (1) a methacrylate-functional resin suitable for use in dental composites in an amount of 84-96% by weight of said liquid component, and (2) a photoinitiator for said resin consisting of an exciplex incorporating as one ingredient either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate in an amount of about 0.7 to 10% by weight of said liquid component, the other ingredient being present in an amount of 0.01-8%, by weight of said liquid component, for a total photoinitiator amount by weight of said liquid component of about 0.7 to 18%, said other ingredient of said exciplex being a single compound selected from the group consisting of 2,3-bornanedione, 2-isopropyl thioxanthone, dimethoxy acetophenone, benzil dimethyl acetal, and 2-hydroxy-2-methyl-1-phenyl-propan-1-one, said powder and liquid components being mixed together just before use in a weight ratio of from 2:1 to 31/2 powder to liquid.

Claim 27

Dependent Claim 37 words

The restorative material of claim 22 wherein said powder component is selected from the group consisting of barium glass, strontium glass, lithium aluminum silicate, flint silica and mixtures of the members of this group with each others.

Claim 28

Dependent Claim 22 words

The restorative material of claim 23 wherein said powder component is a mixture of barium glass, lithium aluminum silicate and flint silica.

Claim 29

Dependent Claim 37 words

The restorative material of claim 24, wherein said powder component, by weight of said powder component contains: Barium glass: 23-30%, Lithium aluminum silicate: 54-70%, Flint silica: 1-70%, for a total filler content of about 971/2 to 99.85%.

Claim 30

Dependent Claim 20 words

The restorative material of claim 22 wherein said powder component also contains glacial acetic acid and gamma-methacryloxy propyl trimethoxy silane.

Claim 31

Dependent Claim 47 words

The restorative material of claim 26 wherein said glacial acetic acid is present in an amount of about 0.001-0.05%, by weight of said powder component, and said silane is present in an amount of about 1/10 of 1% to about 11/2% by weight of said powder component.

Claim 32

Dependent Claim 43 words

The restorative material of claim 22 wherein the resin in said liquid component is selected from the group consisting of ethoxylated bisphenol-A-dimethacrylate, bis-GMA, a mixture of ethoxylated bisphenol-A-dimethacrylate and an ethylene glycol dimethacrylate, and a mixture of bis-GMA and an ethylene glycol dimethacrylate.

Claim 33

Dependent Claim 26 words

The restorative material of claim 28 wherein said resin is ethoxylated bisphenol-A-dimethacrylate in an amount of about 82 to 99.3% by weight of said liquid component.

Claim 34

Dependent Claim 29 words

The restorative material of claim 28 wherein said resin is a mixture, by weight of said liquid component, of about 60-84% ethoxylated bisphenol-A-dimethacrylate and about 40-16% triethylene glycol dimethacrylate.

Claim 35

Dependent Claim 29 words

The restorative material of claim 28 wherein said resin is a mixture, by weight of said liquid component of about 55% Bis-GMA and about 36% of triethylene glycol dimethacrylate.

Claim 36

Dependent Claim 26 words

The restorative material of claim 22, wherein said peroxide curing agent is benzoyl peroxide and said photoinitiator is an exciplex of ethyl-4-dimethyl amino benzoate and 2,3-bornanedione.

Claim 37

Dependent Claim 20 words

The restorative material of claim 32 wherein said powder component is a mixture of barium glass and lithium aluminum silicate.

Claim 38

Dependent Claim 35 words

The restorative material of claim 22 wherein the amounts by weight of said other ingredient in said liquid component are: 2,3 Bornanedione: 0.02-0.2%, 2-Isopropylthioxanthone: 0.02-0.2%, Dimethoxy acetophenone: 0.02-8%, Benzil dimethyl acetal: 0.02-7%, 2-hydroxy-2-methyl-1-phenyl propan-1-one: 0.02-8%.

Claim 39

Dependent Claim 25 words

The restorative material of claim 22 wherein said liquid component also includes BHT in an amount of about 0.02% by weight of said liquid component.

Claim 40

Dependent Claim 151 words

A two-paste system for porcelain and dental restoration, said pastes being mixed together at the time of use in substantially equal amounts by weight, both pastes containing methacrylate-functional resin suitable for use in dental components and dental filler material in an amount totaling over 95% thereof by weight of each paste, one said paste containing a peroxide curing agent for said resin in an amount of about 0.1% to 1.0% by weight of that paste, the other said paste containing an exciplex visible-light-reactive photoinitiator for said resin in an amount of about 1 to 3.5% by weight of that paste, said exciplex including either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, the other ingredient of the exciplex being selected from the group consisting of 2,4 bornanedione in an amount of about 0.06% by weight of the paste containing it and 2-isopropyl thioxanthone in an amount of 0.015%-0.06% of the exciplex-containing paste.

Claim 41

Dependent Claim 151 words

A two-paste system for porcelain and dental restoration, said pastes being mixed together at the time of use in substantially equal amounts by weight, both pastes containing methacrylate-functional resin suitable for use in dental components and dental filler material in an amount totaling over 95% thereof by weight of each paste, one said paste containing a peroxide curing agent for said resin in an amount of about 0.1% to 1.0% by weight of that paste, the other said paste containing an exciplex visible-light-reactive photoinitiator for said resin in an amount of about 1 to 3.5% by weight of that paste, said exciplex including either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, the other ingredient of the exciplex being selected from the group consisting of 2,4 bornanedione in an amount of about 0.06% by weight of the paste containing it and 2-isopropyl thioxanthone in an amount of 0.015%-0.06% of the exciplex-containing paste.

Claim 42

Dependent Claim 28 words

The system of claim 36 in which each paste also contains gamma-methacryloxy propyl trimethoxy silane in an amount of about 0.05 to 1.2% by weight of each paste.

Claim 43

Dependent Claim 30 words

The system of claim 36 in which at least one of the pastes also contains glacial acetic acid in an amount of at least 0.0015% by weight of that paste.

Claim 44

Dependent Claim 11 words

The system of claim 36 wherein said resin is ethoxylated bisphenol-A-dimethacrylate.

Claim 45

Dependent Claim 32 words

The system of claim 36 wherein said resin is present in the peroxide-containing paste in an amount of about 14-40% and is present in the exciplex-containing paste in an amount of 14-36%.

Claim 46

Dependent Claim 33 words

The system of claim 36 wherein said filler is chosen from (a) the group consisting of strontium glass and a mixture of barium glass with lithium aluminum silicate, and also includes fumed silica.

Claim 47

Dependent Claim 25 words

The system of claim 41 wherein the filler comprises, by weight of each paste about 1% of fumed silica and about 80% of strontium glass.

Claim 48

Dependent Claim 31 words

The system of claim 41 wherein the filler comprises, by weight of each paste, about 1% of fumed silica, about 23-25% of barium glass, and about 54-58% of lithium aluminum silicate.

Claim 49

Dependent Claim 150 words

A paste-powder system for use in dental and porcelain restoration, the paste and powder being mixed at the time of use at a ratio of paste to powder of about 10:1 to 20:1, said paste comprising the mixture of methacrylate-functional dental resin and powdered dental filler in a total amount of about 96-99% by weight of the paste and having an exciplex, visual-light reactive photoinitiator in a total amount of about 0.7-10% by weight of the paste, said exciplex being made up of (a) either 2,3-bornanedione or 2-isopropyl thioxanthone in an amount of about 0.03% to 0.06% by weight of said paste and, (b) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate in an amount of about 0.75 to 3.25% by weight of said paste, said powder consisting essentially of a dental filler and a peroxide curing agent for the resin in an amount of about 0.3%-9% of the powder.

Claim 50

Dependent Claim 150 words

A paste-powder system for use in dental and porcelain restoration, the paste and powder being mixed at the time of use at a ratio of paste to powder of about 10:1 to 20:1, said paste comprising the mixture of methacrylate-functional dental resin and powdered dental filler in a total amount of about 96-99% by weight of the paste and having an exciplex, visual-light reactive photoinitiator in a total amount of about 0.7-10% by weight of the paste, said exciplex being made up of (a) either 2,3-bornanedione or 2-isopropyl thioxanthone in an amount of about 0.03% to 0.06% by weight of said paste and, (b) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate in an amount of about 0.75 to 3.25% by weight of said paste, said powder consisting essentially of a dental filler and a peroxide curing agent for the resin in an amount of about 0.3%-9% of the powder.

Claim 51

Dependent Claim 35 words

The system of claim 44 wherein said resin is selected from the group consisting of ethoxylated bisphenol-A-dimethacrylate, a mixture thereof with an ethylene glycol dimethacrylate, and a mixture of bis-GMA with an ethylene glycol dimethacrylate.

Claim 52

Dependent Claim 18 words

The system of claim 45 wherein the resin is from 16-64% ethoxylated bisphenol-A-dimethacrylate, by weight of said paste.

Claim 53

Dependent Claim 29 words

The system of claim 45 wherein the resin is a mixture of about 13% ethoxylated bisphenol-A-dimethacrylate and about 31/4% of triethylene glycol dimethacrylate, both by weight of said resin.

Claim 54

Dependent Claim 27 words

The system of claim 45 wherein the resin is a mixture of about 10% bis-GMA and about 61/2% triethylene glycol dimethacrylate, both by weight of said resin.

Claim 55

Dependent Claim 11 words

The system of claim 44 wherein the filler is fumed silica.

Claim 56

Dependent Claim 18 words

The system of claim 44 wherein the filler is a mixture of lithium aluminum silicate and barium glass.

Claim 57

Dependent Claim 28 words

The system of claim 44 wherein at least the powder contains gamma-methacryloxy propyl trimethoxy silane, in an amount of about 1.25 to 5.25% by weight of its component.

Claim 58

Dependent Claim 27 words

The system of claim 44 wherein at least the powder contains glacial acetic acid in an amount of about 0.02 to 0.2% by weight of its component.

Claim 59

Dependent Claim 175 words

A gel-powder system for use in dental and porcelain restoration, the gel and powder being mixed at the time of use for cure by visible light, in a ratio of about 20:1 to 1:3 of gel to powder, the gel consisting essentially of about 3/4 methacrylate-functional dental resin and about 1/4 dental filler to a total amount of about 93-98% by weight of said gel and an exciplex, visible-light-reactive photoinitiator having two ingredients, one of which is either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, in a total amount of about 2% to 7% by weight of the gel, said powder consisting essentially of a dental filler and an accelerator-free peroxide curing agent for said resin in an amount of about 0.1%-10% by weight of said powder, said exciplex being made up of (a) either 2,3-bornanedione or 2-isopropyl thioxanthone in an amount of about 0.005 to 0.15% by weight of said gel and, (b) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate in an amount of about 2.0 to 8% by weight of said gel.

Claim 60

Dependent Claim 175 words

A gel-powder system for use in dental and porcelain restoration, the gel and powder being mixed at the time of use for cure by visible light, in a ratio of about 20:1 to 1:3 of gel to powder, the gel consisting essentially of about 3/4 methacrylate-functional dental resin and about 1/4 dental filler to a total amount of about 93-98% by weight of said gel and an exciplex, visible-light-reactive photoinitiator having two ingredients, one of which is either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, in a total amount of about 2% to 7% by weight of the gel, said powder consisting essentially of a dental filler and an accelerator-free peroxide curing agent for said resin in an amount of about 0.1%-10% by weight of said powder, said exciplex being made up of (a) either 2,3-bornanedione or 2-isopropyl thioxanthone in an amount of about 0.005 to 0.15% by weight of said gel and, (b) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate in an amount of about 2.0 to 8% by weight of said gel.

Claim 61

Dependent Claim 11 words

The system of claim 53 wherein said resin is ethoxylated bisphenol-A-dimethacrylate.

Claim 62

Dependent Claim 37 words

The system of claim 53 wherein said filler for the powder component is selected from the group consisting of barium glass, lithium aluminum silicate, flint silica and mixtures of the members of this group with each others.

Claim 63

Dependent Claim 24 words

The system of claim 53 wherein said filler for the powder component is a mixture of barium glass, lithium aluminum silicate and flint silica.

Claim 64

Dependent Claim 29 words

The system of claim 53 wherein said filler for the powder component contains, by weight of the powder, 26-30% barium glass, 62-70% lithium aluminum silicate and 1-10% flint silica.

Claim 65

Dependent Claim 15 words

The system of claim 53 wherein said filler for the gel component is fumed silica.

Claim 66

Dependent Claim 22 words

The system of claim 53 wherein said filler for the gel component is a mixture of barium glass and lithium aluminum silicate.

Claim 67

Dependent Claim 32 words

The system of claim 53 wherein said filler for the gel component comprises, by weight of the gel, about 2-5% barium glass, about 5-10% lithium aluminum silicate and about 7-10% fumed silica.

Claim 68

Dependent Claim 29 words

The system of claim 53 wherein at least the powder component contains gamma-methacryloxy propyl trimethoxy silane, in an amount of about 0.05 to 2.0% by weight of its component.

Claim 69

Dependent Claim 28 words

The system of claim 53 wherein at least the powder component contains glacial acetic acid, in an amount of about 0.01 to 0.05% by weight of its component.

Claim 70

Independent Claim 173 words

A method for repairing porcelain or teeth, comprising mixing together under ordinary indoor lighting conditions, a methacrylate functional resin usable in dental composites, powdered dental filler-colorant, at least one photoinitiator for said resin in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5000 foot-candles, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, and at least one accelerator-free peroxide curing agent for said resin in an effective amount for completing polymerization within about an hour of any portion of said resin not receiving sufficient light to effect complete cure before then, emplacing the mixture within a few minutes of the mixing, and curing at least a substantial portion of the emplaced mixture in situ for one half-minute under intense visual-light illumination of at least 5000 foot-candles, any resin then uncured by light being cured within about another hour by said peroxide curing agent.

Claim 71

Independent Claim 173 words

A method for repairing porcelain or teeth, comprising mixing together under ordinary indoor lighting conditions, a methacrylate functional resin usable in dental composites, powdered dental filler-colorant, at least one photoinitiator for said resin in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5000 foot-candles, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, and at least one accelerator-free peroxide curing agent for said resin in an effective amount for completing polymerization within about an hour of any portion of said resin not receiving sufficient light to effect complete cure before then, emplacing the mixture within a few minutes of the mixing, and curing at least a substantial portion of the emplaced mixture in situ for one half-minute under intense visual-light illumination of at least 5000 foot-candles, any resin then uncured by light being cured within about another hour by said peroxide curing agent.

Claim 72

Dependent Claim 34 words

The method of claim 63 wherein the resin is at least one resin chosen from the group consisting of ethoxylated bisphenol-A-dimethacrylate, bis-GMA, and an adduct of 2,2'-propane bis[3-(4-phenoxy)-1,2-hydroxy propane-1 methacrylate] and mono- or di-isocyanate.

Claim 73

Dependent Claim 13 words

The method of claim 63 wherein said peroxide curing agent is benzoyl peroxide.

Claim 74

Dependent Claim 112 words

The method of claim 63 wherein each said photoinitiator is an exciplex chosen from the group consisting of: 2,3-Bornanedione with ethyl-4-dimethyl amino benzoate 2,3-Bornanedione with ethyl-2-dimethyl amino benzoate Benzil with ethyl-4-dimethyl amino benzoate Benzil with ethyl-2-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-4-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-2-dimethyl amino benzoate Dibenzyl ketone with ethyl-4-dimethyl amino benzoate Dibenzyl ketone with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-2-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-4-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-2-dimethyl amino benzoate Benzoin methyl ester with ethyl-4-dimethyl amino benzoate Benzoin methyl ether with ethyl-2-dimethyl amino benzoate.

Claim 75

Independent Claim 169 words

A method for preparing a storable filled-resin composition for porcelain repair and as a dental composite, comprising: mixing a methacrylate functional resin usable in dental composites with at least one photoinitiator for said resin, in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5000 foot-candles, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, storing the resin-photoinitiator mixture in an opaque container, coating a powdered dental filler-colorant with at least one accelerator-free peroxide curing agent for said resin in an effective amount substantially less than stoichiometric, and sufficient to effect completion of polymerization within about an hour of any portion of said resin not receiving sufficient light durng said half a minute, and storing said filler-colorant and peroxide mixture, whereby at the time of use said resin-photoinitiator mixture can be mixed with said peroxide-coated filler-colorant under ordinary indoor illumination.

Claim 76

Independent Claim 169 words

A method for preparing a storable filled-resin composition for porcelain repair and as a dental composite, comprising: mixing a methacrylate functional resin usable in dental composites with at least one photoinitiator for said resin, in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5000 foot-candles, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, storing the resin-photoinitiator mixture in an opaque container, coating a powdered dental filler-colorant with at least one accelerator-free peroxide curing agent for said resin in an effective amount substantially less than stoichiometric, and sufficient to effect completion of polymerization within about an hour of any portion of said resin not receiving sufficient light durng said half a minute, and storing said filler-colorant and peroxide mixture, whereby at the time of use said resin-photoinitiator mixture can be mixed with said peroxide-coated filler-colorant under ordinary indoor illumination.

Claim 77

Independent Claim 225 words

A method for repairing porcelain or teeth, comprising preparing under ordinary indoor lighting conditions, a liquid mixture consisting essentially of a methacrylate functional resin usable in dental composites, and at least one photoinitiator for said resin in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5000 foot-candles, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, preparing under ordinary indoor lighting conditions a powdered mixture of powdered dental filler-colorant and at least one accelerator-free peroxide curing agent for said resin in an effective amount for completing polymerization within about an hour of any portion of said resin not receiving sufficient light to effect complete cure before then, mixing said powder mixture and said liquid mixture together under ordinary indoor lighting conditions in a powder to liquid ratios of about 1:1 to 4:1 just prior to use to provide a repair mixture, emplacing the repair mixture within a few minutes of the mixing, and curing at least a substantial portion of the emplaced mixture in situ for one half-minute under intense visual-light illumination of at least 5000 foot-candles, any resin then uncured by light being curred within the next half hour by said peroxide curing agent.

Claim 78

Independent Claim 225 words

A method for repairing porcelain or teeth, comprising preparing under ordinary indoor lighting conditions, a liquid mixture consisting essentially of a methacrylate functional resin usable in dental composites, and at least one photoinitiator for said resin in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5000 foot-candles, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, preparing under ordinary indoor lighting conditions a powdered mixture of powdered dental filler-colorant and at least one accelerator-free peroxide curing agent for said resin in an effective amount for completing polymerization within about an hour of any portion of said resin not receiving sufficient light to effect complete cure before then, mixing said powder mixture and said liquid mixture together under ordinary indoor lighting conditions in a powder to liquid ratios of about 1:1 to 4:1 just prior to use to provide a repair mixture, emplacing the repair mixture within a few minutes of the mixing, and curing at least a substantial portion of the emplaced mixture in situ for one half-minute under intense visual-light illumination of at least 5000 foot-candles, any resin then uncured by light being curred within the next half hour by said peroxide curing agent.

Claim 79

Dependent Claim 13 words

The method of claim 68 wherein said peroxide curing agent is benzoyl peroxide.

Claim 80

Dependent Claim 113 words

The method of claim 68 wherein each said photoinitiator is an exciplex chosen from the group consisting of: 2,3-Bornanedione with ethyl-4-dimethyl amino benzoate 2,3-Bornanedione with ethyl-2-dimethyl amino benzoate Benzil with ethyl-4-dimethyl amino benzoate Benzil with ethyl-2-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl 4-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-2-dimethyl amino benzoate Dibenzyl ketone with ethyl-4-dimethyl amino benzoate Dibenzyl ketone with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-2-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-4-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-2-dimethyl amino benzoate Benzoin methyl ether with ethyl-4-dimethyl amino benzoate Benzoin methyl ether with ethyl-2-dimethyl amino benzoate.

Claim 81

Dependent Claim 33 words

The method of claim 69 wherein said exciplex constitutes about 0.7% to about 18% by weight of said liquid mixture and said peroxide constitutes about 0.1 to about 0.8% of said powder mixture.

Claim 82

Dependent Claim 29 words

The method of claim 68 having the step in between preparing and mixing of storing said powder in a container and of storing said liquid in an opaque container.

Claim 83

Independent Claim 229 words

A method for repairing porcelain or teeth, comprising: providing under ordinary indoor lighting conditions first paste consisting essentially of a methacrylate functional resin usable in dental composites, a powdered dental filler-colorant, and at least one photoinitiator for said resin in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5000 foot-candles, said photoinitiator being n exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, providing under ordinary indoor lighting conditions a second paste consisting essentially of a methacrylate functional resin usable in dental composites, a powdered dental filler colorant, and at least one accelerator-free peroxide curing agent for said resin in an effective amount for completing polymerization within about an hour of any portion of said resin not receiving sufficient light to effectuate complete cure before then, mixing under ordinary indoor lighting conditions said first and second pastes in approximately the same amount of each, to form a paste mixture, emplacing the paste mixture within a few minutes of the mixing, and curing at least a substantial portion of the emplaced mixture in situ for one half-minute under intense visual-light illumination of at least 5000 foot-candles, any resin then uncured by light being cured within about an hour thereafter by said peroxide curing agent.

Claim 84

Independent Claim 229 words

A method for repairing porcelain or teeth, comprising: providing under ordinary indoor lighting conditions first paste consisting essentially of a methacrylate functional resin usable in dental composites, a powdered dental filler-colorant, and at least one photoinitiator for said resin in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5000 foot-candles, said photoinitiator being n exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, providing under ordinary indoor lighting conditions a second paste consisting essentially of a methacrylate functional resin usable in dental composites, a powdered dental filler colorant, and at least one accelerator-free peroxide curing agent for said resin in an effective amount for completing polymerization within about an hour of any portion of said resin not receiving sufficient light to effectuate complete cure before then, mixing under ordinary indoor lighting conditions said first and second pastes in approximately the same amount of each, to form a paste mixture, emplacing the paste mixture within a few minutes of the mixing, and curing at least a substantial portion of the emplaced mixture in situ for one half-minute under intense visual-light illumination of at least 5000 foot-candles, any resin then uncured by light being cured within about an hour thereafter by said peroxide curing agent.

Claim 85

Dependent Claim 13 words

The method of claim 73 wherein said peroxide curing agent is benzoyl peroxide.

Claim 86

Dependent Claim 112 words

The method of claim 73 wherein each said photoinitiator is an exciplex chosen from the group consisting of: 2,3-Bornanedione with ethyl-4-dimethyl amino benzoate 2,3-Bornanedione with ethyl-2-dimethyl amino benzoate Benzil with ethyl-4-dimethyl amino benzoate Benzil with ethyl-2-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-4-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-2-dimethyl amino benzoate Dibenzyl ketone with ethyl-4-dimethyl amino benzoate Dibenzyl ketone with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-2-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-4-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-2-dimethyl amino benzoate Benzoin methyl ether with ethyl-4-dimethyl amino benzoate Benzoin methyl ether with ethyl-2-dimethyl amino benzoate.

Claim 87

Dependent Claim 33 words

The method of claim 73 wherein said first paste, at least, is prepared long in advance and comprising the step of storing said first paste in an opaque container until said mixing step.

Claim 88

Dependent Claim 34 words

The method of claim 73 in which said exciplex constitutes about 1 to 4% by weight of said first paste and said peroxide constitutes about 0.1 to 1.0% by weight of said second paste.

Claim 89

Independent Claim 227 words

A method for repairing porcelain or teeth, comprising: mixing together under ordinary indoor lighting conditions a paste consisting essentially of a methacrylate functional resin usable in dental composites, powdered dental filler-colorant, at least one photoinitiator for said resin in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5000 foot-candles, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, mixing together under ordinary indoor lighting conditions powder consisting essentially of a powdered dental filler-colorant and at least one accelerator-free peroxide curing agent for said resin in an effective amount for completing polymerization within about one-half hour of any portion of said resin not receiving sufficient light to effective complete cure before then, mixing together under ordinary indoor lighting conditions, immediately before use, said paste and said powder in a ratio of paste to powder of about 20:1 to 10:1, to form a thick paste, emplacing the thick paste within a few minutes of the mixing, and curing at least a substantial portion of the emplaced mixture in situ for one half-minute under intense visual-light illumination of at least 5000 foot-candles, any resin then uncured by light being cured within about an hour thereafter by said peroxide curing agent.

Claim 90

Independent Claim 227 words

A method for repairing porcelain or teeth, comprising: mixing together under ordinary indoor lighting conditions a paste consisting essentially of a methacrylate functional resin usable in dental composites, powdered dental filler-colorant, at least one photoinitiator for said resin in an amount sufficient to initiate polymerization and complete it in depth within about half a minute when exposed to a visible-light output of at least 5000 foot-candles, said photoinitiator being an exciplex of (1) a carbocyclic ketone or acetal and (2) either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate, mixing together under ordinary indoor lighting conditions powder consisting essentially of a powdered dental filler-colorant and at least one accelerator-free peroxide curing agent for said resin in an effective amount for completing polymerization within about one-half hour of any portion of said resin not receiving sufficient light to effective complete cure before then, mixing together under ordinary indoor lighting conditions, immediately before use, said paste and said powder in a ratio of paste to powder of about 20:1 to 10:1, to form a thick paste, emplacing the thick paste within a few minutes of the mixing, and curing at least a substantial portion of the emplaced mixture in situ for one half-minute under intense visual-light illumination of at least 5000 foot-candles, any resin then uncured by light being cured within about an hour thereafter by said peroxide curing agent.

Claim 91

Dependent Claim 13 words

The composition of claim 78 wherein said peroxide curing agent is benzoyl peroxide.

Claim 92

Dependent Claim 112 words

The composition of claim 78 wherein each said photoinitiator is an exciplex chosen from the group consisting of: 2,3-Bornanedione with ethyl-4-dimethyl amino benzoate 2,3-Bornanedione with ethyl-2-dimethyl amino benzoate Benzil with ethyl-4-dimethyl amino benzoate Benzil with ethyl-2-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-4-dimethyl amino benzoate 2-Isopropyl thioxanthone with ethyl-2-dimethyl amino benzoate Dibenzyl ketone with ethyl-4-dimethyl amino benzoate Dibenzyl ketone with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-2-dimethyl amino benzoate 2-Hydroxy-2-methyl-1-phenyl-propan-1-one with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-4-dimethyl amino benzoate Benzil dimethyl acetal with ethyl-2-dimethyl amino benzoate Dimethoxy acetophenone with ethyl-4-dimethyl amino benzoate Dimethoxy acetophonone with ethyl-2-dimethyl amino benzoate Benzoin methyl ether with ethyl-4-dimethyl amino benzoate Benzoin methyl ether with ethyl-2-dimethyl -amino benzoate.

Claim 93

Dependent Claim 39 words

The method of claim 78 wherein said mixing of said paste is done well in advance of use including the step of storing said paste in an opaque container prior to said mixing of the powder with the paste.

Claim 94

Dependent Claim 28 words

The method of claim 78 wherein said exciplex constitutes about 0.7 to 4% of said paste and said peroxide constitutes about 0.3 to about 10% of said powder.

Claim 95

Independent Claim 207 words

A method for repairing porcelain or teeth, comprising: mixing together under ordinary indoor lighting conditions, a gel consisting essentially of about 3/4 methacrylate-functional dental resin and about 1/4 dental filler to a total amount of about 93 to 971/2% by weight of the gel and an exciplex, visible-light-reactive photoinitiator having two ingredients, one of which is either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate in an amount of about 2.0 to 7.5% by weight of the gel the other ingredient being either 2,3-bornanedione or 2-isopropyl thioxanthone in an amount of about 0.005 to 0.15% by weight of the gel, in a total amount of about 2% to 8% by weight of the gel, with a powder consisting essentially of a filler and an accelerator free peroxide curing agent for the resin in an amount of about 0.1-5% by weight of the powder, in a ratio of about 20:1 to 1:3 of gel to powder, emplacing the gel-powder mixture within a few minutes of mixing, and curing at least a substantial portion of the emplaced mixture in situ for one half-minute under intense visual-light illumination of at least 5000 foot-candles, any resin then uncured by light being cured within about an hour thereafter by said peroxide curing agent.

Claim 96

Independent Claim 207 words

A method for repairing porcelain or teeth, comprising: mixing together under ordinary indoor lighting conditions, a gel consisting essentially of about 3/4 methacrylate-functional dental resin and about 1/4 dental filler to a total amount of about 93 to 971/2% by weight of the gel and an exciplex, visible-light-reactive photoinitiator having two ingredients, one of which is either ethyl-4-dimethyl amino benzoate or ethyl-2-dimethyl amino benzoate in an amount of about 2.0 to 7.5% by weight of the gel the other ingredient being either 2,3-bornanedione or 2-isopropyl thioxanthone in an amount of about 0.005 to 0.15% by weight of the gel, in a total amount of about 2% to 8% by weight of the gel, with a powder consisting essentially of a filler and an accelerator free peroxide curing agent for the resin in an amount of about 0.1-5% by weight of the powder, in a ratio of about 20:1 to 1:3 of gel to powder, emplacing the gel-powder mixture within a few minutes of mixing, and curing at least a substantial portion of the emplaced mixture in situ for one half-minute under intense visual-light illumination of at least 5000 foot-candles, any resin then uncured by light being cured within about an hour thereafter by said peroxide curing agent.

Claim 97

Dependent Claim 11 words

The method of claim 83 wherein the resin is ethoxylated bisphenol-A-dimethacrylate.

Claim 98

Dependent Claim 15 words

The method of claim 83 wherein the filler for the gel component is fumed silica.

Claim 99

Dependent Claim 32 words

The method of claim 83 wherein the filler for the gel component comprises, by weight of the gel, about 2-5% barium glass, about 5-10% lithium aluminum silicate and about 7-10% fumed silica.

Claim 100

Dependent Claim 37 words

The method of claim 83 wherein the filler for the powder component is selected from the group consisting of barium glass, lithium aluminum silicate, flint silica and mixtures of the members of this group with each other.

Claim 101

Dependent Claim 29 words

The method of claim 83 wherein the filler for the powder component contains, by weight of the powder, 16-30% barium glass, 62-70% lithium aluminum silicate and 1-10% flint silica.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1990-06-22	1990-12-22	1991-06-23	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1994-06-22	1994-12-22	1995-06-23	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1998-06-22	1998-12-22	1999-06-23	$7700.00	Window Closed / Lapsed

Dental composite and porcelain repair

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