Radiopaque fluoride releasing VLC dental composites and the use of specific fillers therein
First Claim
Patent Images
1. A dental composite composition comprising;
- photoactivated resin suitable for a dental restorative and translucent, phase separated, fluoride-containing glass wherein the phase separated droplets do not exceed about 1400 angstrom in size and wherein upon exposure to an aqueous environment, fluoride ions will be released therefrom at a controlled, relatively constant rate over a substantial period of time, but with essentially no development of porosity or other physical breakdown effect, and which can be melted and formed with relatively low volatilization of fluorine, said glass being essentially free of alkali metal oxides and heavy toxic metals and consisting essentially, expressed in terms of weight percent of;
SiO2 ;
40-56;
BaO;
15-35;
Al2 O3 ;
4-12;
B2 O3 ;
5-12;
F;
2-20;
ZrO;
0-7;
SrO;
0-18.
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Accused Products
Abstract
One component, visible light-cured dental restorative compositions having fluoride release properties for the purpose of reducing the chances of secondary caries are provided. The compositions include inorganic particulate fluoride leachable glass.
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Citations
29 Claims
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1. A dental composite composition comprising;
- photoactivated resin suitable for a dental restorative and translucent, phase separated, fluoride-containing glass wherein the phase separated droplets do not exceed about 1400 angstrom in size and wherein upon exposure to an aqueous environment, fluoride ions will be released therefrom at a controlled, relatively constant rate over a substantial period of time, but with essentially no development of porosity or other physical breakdown effect, and which can be melted and formed with relatively low volatilization of fluorine, said glass being essentially free of alkali metal oxides and heavy toxic metals and consisting essentially, expressed in terms of weight percent of;
SiO2 ;
40-56;
BaO;
15-35;
Al2 O3 ;
4-12;
B2 O3 ;
5-12;
F;
2-20;
ZrO;
0-7;
SrO;
0-18. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
- photoactivated resin suitable for a dental restorative and translucent, phase separated, fluoride-containing glass wherein the phase separated droplets do not exceed about 1400 angstrom in size and wherein upon exposure to an aqueous environment, fluoride ions will be released therefrom at a controlled, relatively constant rate over a substantial period of time, but with essentially no development of porosity or other physical breakdown effect, and which can be melted and formed with relatively low volatilization of fluorine, said glass being essentially free of alkali metal oxides and heavy toxic metals and consisting essentially, expressed in terms of weight percent of;
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2. A method of making a dental composite restorative composition, comprising:
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providing a resin suitable for use in a dental restorative and an inorganic filler comprising nonalkali, radiopaque glass containing extractable fluoride, said glass being translucent, phase separated, fluoride-containing glass wherein the phase separated droplets do not exceed about 1400 angstrom in size and wherein upon exposure to an aqueous environment, fluoride ions will be released therefrom at a controlled, relatively constant rate over a substantial period of time, but with essentially no development of porosity or other physical breakdown effect, and which can be melted and formed with relatively low volatilization of fluorine, said glass being essentially free of alkali metal oxides and heavy toxic metals and consisting essentially, expressed in terms of weight percent of;
SiO2 ;
41.4-55.9;
BaO;
24.7-33.6;
Al2 O3 ;
5.6-11;
B2 O3 ;
6.5-10.3;
F;
3-6 andforming said composition into a dental composite restorative adapted to provide at least 0.5 ppm of fluoride through leaching into a static aqueous medium at about 37°
C. replaced weekly over a 30 week period.
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3. A method of extracting fluoride form a dental composite restorative composition, comprising:
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providing a blend of at least 10% by weight of polymerizable resin suitable for use in a dental restorative and from 20 and 90% by weight of an inorganic filer comprising nonalkali, silantable, radiopaque glass containing BaO and fluoride, said glass being translucent, phase separated, fluoride-containing glass wherein the phase separated droplets do not exceed about 1400 angstrom in size and wherein upon exposure to an aqueous environment, fluoride ions will be released therefrom at a controlled, relatively constant rate over a substantial period of time, but with essentially no development of porosity or other physical breakdown effect, and which can be melted and formed with relatively low volatilization of fluorine, said glass being essentially free of alkali metal oxides and heavy toxic metals and consisting essentially, expressed in terms of weight percent of;
SiO2 ;
41.4-55.9;
BaO;
24.7-33.6;
Al2 O3 ;
5.6-11;
B2 O3 ;
6.5-10.3;
F;
3-6 andforming said composition into a dental composite restorative adapted to provide at least 0.5 ppm of fluoride through leaching into a static aqueous medium at about 37°
C. at a rate sufficient to maintain from about 0.5 to about 2.0 ppm fluoride in said medium over a 20 week period during which said medium is replaced weekly.
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27. A dental composite restorative composition comprising
(a) a resin suitable for use in a dental restorative, and (b) an inorganic filler particle having a mean particle size less than 9 microns comprising a non alkali, silantable, radiopaque glass containing extractable fluoride, said fluoride comprising from about 1 to about 20 percent by weight of said composition said glass being translucent, phase separated, fluoride-containing glass wherein the phase separated droplets do not exceed about 1400 angstrom in size and wherein upon exposure to an aqueous environment, fluoride ions will be released therefrom at a controlled, relatively constant rate over a substantial period of time, but with essentially no development of porosity or other physical breakdown effect, and which can be melted and formed with relatively low volatilization of fluorine, said glass being essentially free of alkali metal oxides and heavy toxic metals and consisting essentially, expressed in terms of weight percent of: - SiO2 ;
41.4-55.9;
BaO;
24.7-33.6;
Al2 O3 ;
5.6-11;
B2 O3 ;
6.5-10.3;
F;
3-6;
- View Dependent Claims (28, 29)
- SiO2 ;
Specification