Root canal filling material
View Patent ↗An endodontic filling material comprising a biodegrable thermoplastic polymer. A bioactive substance may also be included in the filling material. The thermoplastic polymer acts as a matrix for the bioactive substance. The composition may include other polymeric resins, fillers, plasticizers and other additives typically used in dental materials. The filling material is used for the filing of root canals.
1. A root canal filling material comprising:
a biodegradable thermoplastic polymer matrix and an adhesive;
wherein the root filling material cannot be mixed, kneaded, or pressed at room temperature.
2. The root canal filling material of claim 1 further comprising a bioactive filler.
3. The root canal filling material of claim 1 wherein the biodegradable thermoplastic polymer matrix is present in an amount from about 10 percent to about 100 percent by weight.
4. The root canal filling material of claim 2 wherein the bioactive filler is present in an amount of up to about 90 percent by weight.
5. The root canal filling material of claim 1 wherein the biodegradable polymer matrix comprises polylactides, polyglycolides, polycaprolactones, polyanhydrides, polyamides, polyurethanes, polyesteramides, polyorthoesters, polydioxanones, polyacetals, polyketals, polycarbonates, polyorthocarbonates, polyphosphazenes, polyhydroxybutyrates, polyhydroxyvalerates, polyalkylene oxalates, polyethylene oxides, polyacrylates/methacrylates, polyalkylene succinates, poly(malic acid) polymers, polymaleic anhydrides, poly(methylvinyl) ethers, poly(amino acids), chitin, chitosan, and copolymers, terpolymers, or combinations or mixtures thereof.
6. The root canal filling material of claim 2 wherein the bioactive filler comprises bioactive glass, calcium phosphate, Portland cement, hydroxyapatite, tricalcium phosphate, a di- or polyphosphonic acid, an anti-estrogen, a sodium fluoride preparation, a substance having a phosphate to calcium ratio similar to natural bone, or mixtures thereof.
7. The root canal filling material of claim 2 wherein the bioactive filler comprises bone chips, bone crystals, mineral fractions of bone or teeth, or mixtures thereof.
8. The root canal filling material of claim 2 wherein the bioactive filler comprises particulate or fibrous filler in nanosize, microsize, macrosize form, or mixtures thereof.
9. The root canal filling material of claim 1 further comprising a plasticizer.
10. The root canal filling material of claim 9 wherein the plasticizer is present in an amount of up to about 90 percent by weight.
11. The root canal filling material of claim 9 wherein the plasticizer comprises polyol, polyolfin or a mixture thereof.
12. The root canal filling material of claim 1 wherein the adhesive comprises an acrylate, methacrylate, epoxy or hydroxyl component, or a mixture thereof.
13. The root canal filling material of claim 1 further comprising a polymeric resin, additional filler, pigment, dye, antibiotic, cariostatic, antibacterial, anti-inflammatory, biologically active or therapeutic material.
14. The root canal filling material of claim 13 wherein the polymeric resin comprises polyamides, polyesters, polyolefins, polyimides, polyarylates, polyurethanes, vinyl esters epoxy-based materials, styrenes, styrene acrylonitriles, ABS polymers, polysulfones, polyacetals, polycarbonates, polyphenylene sulfides, polyarylsulfides, polyurethane dimethacrylates, triethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, urethane dimethacrylate, hexane diol dimethacrylate, polycarbonate dimethacrylate, the condensation product of bisphenol A and glycidyl methacrylate, 2,2′-bis [4-(3 -methacryloxy-2-hydroxy propoxy)-phenyl]-propane and mixtures thereof.
15. The root canal filing material of claim 13 wherein the additional filler comprises silica, silicate glass, quartz, zinc oxide, barium sulfate, barium silicate, strontium silicate, barium borosilicate, strontium borosilicate, borosilicate, lithium silicate, amorphous silica, bismuth compounds, ammoniated or deammoniated calcium phosphate, alumina, zirconia, tin oxide, titania, apatites, silica glass fillers, calcium silicate based fillers, hydroxyapatites, barium sulfate, bismuth subcarbonate or mixtures thereof.
16. The root canal filling material of claim 13 wherein the additional filler comprises a fibrous filler.
17. The root canal filling material of claim 16 wherein the fibrous filler comprises glass, ceramic, metal, carbon, graphite, or polymeric fibers.
18. The root canal filling material of claim 17 wherein the polymeric fibers comprise cellulose, polyamide, aramid, polyester, polyaramid, acrylic, vinyl, modacrylic, polyolefin, polytetrafluorethylene, or mixtures thereof.
19. An appliance for applying a filling material to a root canal of a tooth comprising:
a handle;
a shaft; and
filling material disposed on the shaft, wherein the filling material comprises a biodegradable thermoplastic polymer matrix and an adhesive.
20. The appliance of claim 19 wherein the filling material further comprises a bioactive filler.
21. The appliance of claim 19 wherein the biodegradable thermoplastic polymer matrix comprises polylactides, polyglycolides, polycaprolactones, polyanhydrides, polyamides, polyurethanes, polyesteramides, polyorthoesters, polydioxanones, polyacetals, polyketals, polycarbonates, polyorthocarbonates, polyphosphazenes, polyhydroxybutyrates, polyhydroxyvalerates, polyalkylene oxalates, polyethylene oxides, polyacrylates/methacrylates, polyalkylene succinates, poly(malic acid) polymers, polymaleic anhydrides, poly(methylvinyl) ethers, poly(amino acids), chitin, chitosan, and copolymers, terpolymers, or combinations or mixtures thereof.
22. The appliance of claim 20 wherein the bioactive filler comprises bioactive glass, calcium phosphate, Portland cement, hydroxyapatite, tricalcium phosphate, a di- or polyphosphonic acid, an anti-estrogen, a sodium fluoride preparation, a substance having a phosphate to calcium ratio similar to natural bone, or mixtures thereof.
23. A method for restoring the root canal of a tooth comprising:
preparing the root canal;
inserting a filling material into the canal, whereby the filling material comprises a biodegradable thermoplastic polymer matrix and an adhesive; and
whereby the root canal is sealed by the filling material.
24. The method of claim 23 wherein the filling material further comprises a bioactive filler.
25. The method of claim 23 wherein the biodegradable thermoplastic polymer matrix comprises polylactides, polyglycolides, polycaprolactones, polyanhydrides, polyamides, polyurethanes, polyesteramides, polyorthoesters, polydioxanones, polyacetals, polyketals, polycarbonates, polyorthocarbonates, polyphosphazenes, polyhydroxybutyrates, polyhydroxyvalerates, polyalkylene oxalates, polyethylene oxides, polyacrylates/methacrylates, polyalkylene succinates, poly(malic acid) polymers, polymaleic anhydrides, poly(methylvinyl) ethers, poly(amino acids), chitin, chitosan, and copolymers, terpolymers, or combinations or mixtures thereof.
26. The method of claim 24 wherein the bioactive filler comprises bioactive glass, calcium phosphate, Portland cement, hydroxyapatite, tricalcium phosphate, a di- or polyphosphonic acid, an anti-estrogen, a sodium fluoride preparation, a substance having a phosphate to calcium ratio similar to natural bone, or mixtures thereof.
27. The method of claim 23 wherein the filling material further comprises a plasticizer.
28. The method of claim 27 wherein the plasticizer comprises polyol, polyolfin or a mixture thereof.
29. The method of claim 23 wherein the adhesive comprises acrylate, methacrylate, epoxy or hydroxyl component, or a mixture thereof.
30. The method of claim 23 wherein the filling material further comprises a polymeric resin, filler, pigment, dye, antibiotic, cariostatic, antibacterial, anti-inflammatory, biologically active or therapeutic material.
31. The root canal filling material of claim 14 wherein the ABS polymers comprise acrylonitrile-butadiene-styrene copolymers.
32. The root canal filling material of claim 15 wherein the bismuth compounds comprise BiOCl.
33. The root canal filling material of claim 1 shaped in the form of a cone.
34. The appliance of claim 19 wherein the adhesive comprises an acrylate, methacrylate, epoxy or hydroxyl component, or a mixture thereof.
35. The method of claim 23 wherein the adhesive comprises an acrylate, methacrylate, epoxy or hydroxyl component, or a mixture thereof.
36. A root canal filling material comprising:
a biodegradable thermoplastic polymer matrix;
an adhesive; and
a plasticizer.
37. The root canal filling material of claim 36 wherein the plasticizer is present in an amount of up to about 90 percent by weight.
38. The root canal filling material of claim 36 wherein the plasticizer comprises polyol, polyolfin or a mixture thereof.