Self-Healing dental restorative formulations and related methods

• US 20110071234A1
• Filed: 09/18/2009
• Published: 03/24/2011
• Est. Priority Date: 09/18/2009
• Status: Active Grant

• Current Assignee: Premier Dental Products Company
• Original Assignee: Premier Dental Products Company
• Inventors: Latta, Mark A., Gross, Stephen M.
• Granted Patent: US 9,119,774 B2
• Time in Patent Office: Days
• US Class Current: 523/116
• CPC Class Codes: A61K 6/60 comprising organic or organo-metallic additives
• CPC Class Codes: A61K 6/64 Thermal radical initiators
• CPC Class Codes: A61K 6/887 Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61K 6/893 Polyurethanes
• CPC Class Codes: C08L 33/04 Homopolymers or copolymers of esters C08L43/04 takes precedence
• CPC Class Codes: C08L 75/04 Polyurethanes

Abstract

Dental restorative formulations comprising two additives incorporated into the continuous phase of a dental material. One additive contains a capsule with a radical initiator. The other additive contains a capsule with one or more monomers and a radical accelerator. The dental restorative formulation is applied and polymerized to form a composite. When a disturbance occurs in the dental composite, the capsules of the additives rupture so that the radical accelerator of the second capsule decomposes the radical initiator of the first capsule to polymerize the one or more monomers of the second capsule thereby healing the dental composite. The radical accelerator controls the rate of decomposition of the radical initiator.

Claims

1. A dental restorative formulation, comprising:

a first additive comprising a first capsule including a radical initiator; and

a second additive comprising a second capsule including one or more monomers and a radical accelerator, wherein the dental restorative formulation is polymerized to form a composite and upon the occurrence of a disturbance in the composite said first capsule and said second capsule rupture such that said radical accelerator decomposes said radical initiator of said first capsule to polymerize said one or more monomers of said second capsule thereby healing the composite.

2. The dental restorative formulation of claim 1, wherein said radical initiator is an organic peroxide initiator.

3. The dental restorative formulation of claim 1, wherein said radical initiator is benzoyl peroxide.

4. The dental restorative formulation of claim 1, wherein said one or more monomers is acrylic monomers.

5. The dental restorative formulation of claim 1, wherein said one or more monomers is triethyleneglycol dimethacrylate (“

TEGDMA”

).

6. The dental restorative formulation of claim 1, wherein said one or more monomers is 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl]propane (“

Bis-GMA”

).

7. The dental restorative formulation of claim 1, wherein said one or more monomers is 2,2,4-trimethylhexamethylene diurethane (“

UDMA”

).

8. The dental restorative formulation of claim 1, wherein said radical accelerator is N,N-dimethyl-p-toluidine.

9. The dental restorative formulation of claim 1, wherein said one or more monomers are selected from the group comprising of:

2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl]propane (“

Bis-GMA”

), dimethacryloxyethyl 2,2,4-trimethylhexamethylene diurethane (“

UDMA”

), and 1,6-bis-[2-methacryloxy-ethoxycarbonylamino]-2,2,4-trimethylhexane (“

UEDMA”

), triethyleneglycol dimethacrylate (“

TEGDMA”

), polyethylene glycol dimethacrylate (“

PEGDMA”

), glyceroldimethacrylate (“

GDM”

), methacryloyloxyethyl maleate (“

MEMA”

), diethyleneglycol dimethacrylate (“

DEGDMA”

), hexanediol dimethacrylate (“

HDMA”

), hexanediol diacrylate (“

HDDA”

), trimethylolpropanetriacrylate (“

TMPTA”

), trimethylolpropanetrimethacrylate (“

TMPTMA”

), ethoxylated trimethylolpropanetriacrylate (“

EOTMPTA”

), hydroxyethyl methacrylate (“

HEMA”

) and ethoxylated bisphenol A dimethacrylate (“

EBPADMA”

), isopropyl methacrylate;

n-hexyl acrylate;

stearyl acrylate;

diallyl phthalate;

divinyl succinate;

divinyl adipate;

divinyl phthalate;

allyl acrylate;

glycerol triacrylate;

ethyleneglycol diacrylate;

1,3-propanediol di(meth)acrylate;

decanediol dimethacrylate;

1,12-dodecanediol di(meth)acrylate;

trimethylolpropane mono- or di-(meth)acrylate;

trimethylolpropane triacrylate;

butanediol di(meth)acrylate;

1,2,4-butanetriol trimethacrylate;

1,4-cyclohexanediol diacrylate;

pentaerythritol tetra(meth)acrylate;

sorbitol mono-, di-, tri-, tetra-, or penta-(meth)acrylate;

sorbitol hexa-(meth)acrylate;

tetrahydrofurfuryl (meth)acrylate;

bis[1-(2-acryloxy)]-p-ethoxyphenyldimethylmethane;

bis[1-(3-acryloxy-2-hydroxy)]-p-propoxyphenyldimethylmethane;

2,2,4-trimethylhexamethylene diisocyanate;

tris-hydroxyethyl-isocyanurate trimethacrylate, glycerol phosphate monomethacrylates;

glycerol phosphate dimethacrylates;

hydroxyethyl methacrylate phosphates;

2-hydroxypropyl(meth)acrylate;

citric acid di- or tri-methacrylates;

fluoropolymer-functional (meth)acrylates;

poly(meth)acrylated polymaleic acid;

poly(meth)acrylated polycarboxyl-polyphosphonic acid;

poly(meth) acrylated polychlorophosphoric acid;

poly(meth)acrylated polysulfonic acid;

poly(meth)acrylated polyboric acid;

polymerizable bisphosphonic acids, and siloxane-functional (meth)acrylate polysiloxanes, defined as products resulting from hydrolytic polycondensation of one or more of the following silanes;

bis[2-(2-(methacryloyl oxyethoxycarbonyl)ethyl)]-3triethoxysily-lpropyl amine, bis[2-(2(1)-(methacryloyloxypropoxycarbonyl)ethyl)]-3-triet-hoxysilylpropyl amine, 1,3(2)-dimethacryloyloxypropyl-[3-(3-triethoxysilyl-propyl)aminocarbonyl]propionate, 1,3(2)-dimethacryloyloxypropyl-[4-(3-trie-thoxysilyl propyl)aminocarbonyl]butyrate, 1,3(2)-dimethacryloyloxypropyl-[-4-(3-triethoxysilylpropyl)-N-ethylaminocarbonyl]butyrate, 3-[1,3(2)-dimethacryloyl oxypropyl)-2(3)-oxycarbonylamido]propyltriethoxysilane, glycerol phosphate monomethacrylates, glycerol phosphate dimethacrylates, hydroxyethyl methacrylate phosphates, citric acid di- or tri-methacrylates, poly(meth)acrylated oligomaleic acid, poly(meth)acrylated polymaleic acid, poly(meth)acrylated poly(meth)acrylic acid, poly(meth)acrylated polycarboxyl-polyphosphonic acid, poly(meth)acrylated polychlorophosphoric acid, poly(meth)acrylated polysulfonic acid, poly(meth)acrylated polyboric acid and polymerizable bisphosphonic acids.

10. The dental restorative formulation of claim 1, wherein said radical accelerator includes one or more amines selected from the group comprising of:

dimethyl amine, trimethyl amine, ethyl amine, diethyl amine, triethyl amine, n-propyl amine, di-n-propyl amine, tri-n-propyl amine, isopropyl amine, diisopropyl amine, triisopropyl amine, n-butyl amine, isobutyl amine, t-butyl amine, di-n-butyl amine, diisobutyl amine, tri-isobutyl amine, pentyl amine, isopentyl amine, diisopentyl amine, hexyl amine, octyl amine, dodecyl amine, lauryl amine, stearyl amine, aminoethanol, diethanol amine, triethanol amine, aminohexanol, ethoxy aminoethane, dimethyl-(2-chloroethyl) amine, 2-ethylhexyl amine, bis-(2-chloroethyl) amine, 2-ethylhexyl amine, bis-(2-ethylhexyl) amine, N-methyl stearylamine, dialkyl amines, ethylene diamine, N.N′

-dimethyl ethylene diamine, tetramethyl ethylene diamine, diethylene triamine, permethyl diethylene triamine, triethylene tetramine, tetraethylene pentamine, 1.2-diaminopropane, di-propylene triamine, tripropylene tetramine, 1.4-diamino butane, 1.6-diamino hexane, 4-amino-1-diethyl aminopentane, 2.5-diamino-2.5-dimethyl hexane, trimethyl hexamethylene diamine, N.N-dimethyl aminoethanol, 2-(2-diethylamino ethoxy)ethanol, bis-(2-hydroxyethyl)-oleyl amine, tris-[2-(2-hydroxy-ethoxy)-ethyl]amine, 3-amino-1-propanol, methyl-(3-aminopropyl)ether, ethyl-(3-aminopropyl)ether, 1.4-butane diol-bis(3-aminopropyl ether), 3-dimethylamino-1-propanol, 1-amino-2-propanol, 1-diethylamino-2-propanol, diisopropanol amine, methyl-bis-(2-hydroxypropyl)-amine, tris-(2-hydroxypropyl) amine, 4-amino-2-butanol, 2-amino-2-methylpropanol, 2-amino-2-methyl-propanediol, 2-amino-2-hydroxymethylpropanediol, 5-diethylamino-2-pentanone, 3-methylaminopropionic acid nitrile, 6-aminohexanoic acid, 11-aminoundecanoic acid, 6-aminohexanoic acid ethyl ester, 11-aminohexanoic acid isopropyl ester, cyclohexyl amine, N-methylcyclohexyl amine, N.N-dimethylcyclohexyl amine, dicyclohexyl amine, N-ethylcyclohexyl amine, N-(2-hydroxyethyl)-cyclohexyl amine, N.N-bis-(2-hydroxyethyl)-cyclohexyl amine, N-(3-aminopropyl)-cyclohexyl amine, aminomethyl cyclohexane, hexahydro toluidine, hexahydro benzylamine, aniline, N-methyl aniline, N.N-dimethyl aniline, N.N-diethyl aniline, N.N-di-propyl aniline, isobutyl aniline, toluidines, diphenyl amine, hydroxyethyl aniline, bis-(hydroxyethyl) aniline, chloro-aniline, aminophenols, aminobenzoic acids and their esters, benzyl amine, dibenzyl amine, tribenzyl amine, methyldibenzyl amine, α

-phenylethyl amine, xylidine, diisopropyl aniline, dodecyl aniline, amino naphthalene, N-methyl aminonaphthalene, N.N-dimethyl aminonaphthalene, N.N-dibenzyl naphthalene, diamino cyclohexane, 4.4′

-diamino-dicyclohexyl methane, diamino-dimethyl-dicyclohexyl methane, phenylene diamine, xylylene diamine, diamino biphenyl, naphthalene diamines, toluidines, benzidines, 2.2-bis-(aminophenyl)-propane, amino anisoles, amino-thiophenols, aminodiphenyl ethers, amino cresols, morpholine, N-methyl morpholine, N-phenyl morpholine, hydroxyethyl morpholine, N-methyl pyrrolidine, pyrrolidine, piperidine, hydroxyethyl piperidine, pyrrols, pyridines, chinolines, indoles, indolenines, carbazoles, pyrazoles, imidazoles, thiazoles, pyrimidines, chinoxalines, amino morpholine, dimorpholine ethane, [2,2,2]-diazabicyclo octane, and N,N-dimethyl-p-toluidine.

11. The dental restorative formulation of claim 1, wherein said radical initiator is one or more selected from the group comprising of:

azo compounds, inorganic peroxides, acetophenone, benzil/benzoin, redox, ylide, benzophenone, thioxanthones and organic peroxides.

12. The dental restorative formulation of claim 1, wherein the said first capsule and said second capsule account for about 1-15 wt % of the dental composite.

13. A method of forming a dental restorative formulation, comprising the steps of:

providing a dental material;

adding a first additive to the dental material, wherein the first additive comprises a first capsule including a radical initiator;

introducing a second additive to the dental material, wherein the second additive comprises a second capsule including one or more monomers and a radical accelerator;

applying the dental restorative formulation;

polymerizing the dental restorative formulation to form a dental composite; and

rupturing the first capsule and the second capsule when a disturbance occurs in the dental composite, wherein the radical accelerator of the second capsule decomposes the radical initiator of the first capsule to polymerize the one or more monomers of the second capsule thereby healing the dental composite.