Dental restorative compositions
AssigneeKerr Corporation
InventorXuejun Qian
Life of this patent
Estimating the term…
Abstract
Dental restorative compositions of the composite resin/glass ionomer hybrid type and resins used in the compositions. The compositions contain an aromatic-moiety-containing polymerizable resin, a finely divided ion-leachable fluoroaluminosilicate glass filler, a polymerization initiator system, and may contain other components. The aromatic-moiety-containing polymerizable resin has at least one carboxylic acid group and at least one ethylenically unsaturated group such as a (meth)acrylate group. The compositions have improved mechanical strength, improved wear resistance, and sustained long-term fluoride release.
Claims36
A dental composite resin/glass ionomer hybrid restorative composition comprising
- an aromatic-moiety-containing polymerizable resin having at least one ethylenically unsaturated group and at least one carboxylic acid group and selected from the group consisting of:
- the addition reaction product of a styrene-maleic anhydride oligomer and an organic compound having one reactive hydroxyl group and at least one ethylenically unsaturated group,
- a (pyromellitic acid dianhydride)-(glyceroldi(meth)acrylate) adduct (PMGDM), and
- a (pyromellitic acid dianhydride)-(2-hydroxyethyl (meth)acrylate) adduct (PMDM) containing at least 20% of a meta isomer;
- a finely divided ion-leachable fluoroaluminosilicate glass filler, and
- a polymerization initiator system,
- wherein said composition is a single-part non-aqueous composition with a compressive strength of at least 250 MPa.
An aromatic-moiety-containing polymerizable resin, for use in a composite resin/glass ionomer hybrid dental restorative composition, said resin having at least one ethylenically unsaturated group and at least one carboxylic acid group and selected from the group consisting of:
- the addition reaction product of a styrene-maleic anhydride oligomer and an organic compound having one reactive hydroxyl group and at least one ethylenically unsaturated group,
- a (pyromellitic acid dianhydride)-(glyceroldi(meth)acrylate) adduct (PMGDM), and
- a (pyromellitic acid dianhydride)-(2-hydroxyethyl (meth)acrylate) adduct (PMDM) containing at least 20% of a meta isomer,
- wherein said composition is a single-part non-aqueous composition with a compressive strength of at least 250 MPa.
A dental composite resin/glass ionomer hybrid restorative composition comprising
- an aromatic-moiety-containing polymerizable resin selected from the group consisting of
- an addition reaction product of pyromellitic acid dianhydride and 2-hydroxyethyl (meth)acrylate, a meta-isomer of said product comprising at least 20% of said product;
- an addition reaction product of pyromellitic acid dianhydride and glyceroldi(meth)acrylate;
- an addition reaction product of a styrene-maleic anhydride oligomer and glyceroIdi(meth)acrylate, the oligomer having a weight average molecular weight in the range of about 1,000 to about 3,000 and having the (meth)acrylate group attached to a styrene-maleic anhydride oligomer backbone through an ester linkage;
- and
- an addition reaction product of a styrene-maleic anhydride oligomer and 2-hydroxyethyl (meth)acrylate, the oligomer having a weight average molecular weight in the range of about 1,000 to about 3,000 and having the (meth)acrylate group attached to a styrene-maleic anhydride oligomer backbone through an ester linkage,
- a finely divided ion-leachable fluoroaluminosilicate glass filler, and
- a polymerization initiator systems
- wherein said composition is a single-part non-aqueous composition with a compressive strength of at least 250 MPa.
An aromatic-moiety-containing polymerizable resin in a composite resin/glass ionomer hybrid dental restorative composition, said resin selected from the group consisting of
- an addition reaction product of pyromellitic acid dianhydride and 2-hydroxyethyl (meth)acrylate, a meta-isomer of said product comprising at least 20% of said product;
- an addition reaction product of pyromellitic acid dianhydride and glyceroldi(meth)acrylate;
- an addition reaction product of a styrene-maleic anhydride oligomer and glyceroldi(meth)acrylate, the oligomer having a weight average molecular weight in the range of about 1,000 to about 3,000 and having the (meth)acrylate group attached to a styrene-maleic anhydride oligomer backbone through an ester linkage;
- and
- an addition reaction product:
- of a styrene-maleic anhydride oligomer and 2-hydroxyethyl (meth)acrylate, the oligomer having a weight average molecular weight in the range of about 1,000 to about 3,000 and having the (meth)acrylate group attached to a styrene-maleic anhydride oligomer backbone through an ester linkage,
- wherein said composition is a single-part non-aqueous composition with a compressive strength of at least 250 MPa.
Dependencies are inferred from the claim text.