Dental compositions with fluorescent pigment
View Patent ↗The invention features a dental composition containing a fluorescent organic pigment, e.g. a hydroxyl substituted aryl guanamine an or a fluorescent compound encapsulated in a thermo plastic or thermo set polymer, in an amount that provides the composition with fluorescence resembling that of natural teeth.
1. A hardenable dental composition comprising a fluorescent benzoxazole organic pigment and a fluorescent hydroxyl substituted aryl guanamine organic pigment.
2. The composition of claim 1 , wherein the composition upon hardening has natural tooth fluorescence.
3. The composition of claim 1 , wherein at least one of the fluorescent benzoxazole organic pigment and the fluorescent hydroxyl substituted aryl guanamine organic pigment comprises a fluorescent compound encapsulated within or attached to a polymer.
4. The composition of claim 3 , wherein at least one of the fluorescent benzoxazole organic pigment and the fluorescent hydroxyl substituted aryl guanamine organic pigment comprises an intrinsically fluorescent organic compound.
5. The composition of claim 1 , wherein at least one of the fluorescent benzoxazole organic pigment and the fluorescent hydroxyl substituted aryl guanamine organic pigment is present in an amount less than 1 wt-% of the composition.
6. The composition of claim 1 , further comprising a polymerizable component.
7. The composition of claim 6 , wherein the polymerizable component comprises an ethylenically unsaturated compound.
8. The composition of claim 7 , wherein ethylenically unsaturated compound is a (meth)acrylate.
9. The composition of claim 1 , further comprising an initiator system.
10. The composition of claim 9 , wherein the composition is photo-curable and the initiator system comprises a photoinitiator.
11. The composition of claim 1 , further comprising a filler system.
12. The composition of claim 11 , wherein the filler system comprises silica nanoparticles, zirconia nanoparticles, nanoclusters of silica and zirconia nanoparticles, or a combination thereof.
13. The composition of claim 12 , wherein the nanoparticles or nanoclusters have been silane treated.
14. A method of making of dental composition having natural tooth fluorescence, the method comprising the steps of:
(a) providing a dental resin system that, upon curing, provides a material that has a non-natural tooth fluorescence; and
(b) adding a sufficient amount of a fluorescent benzoxazole organic pigment and a fluorescent hydroxyl substituted aryl guanamine organic pigment to the resin system to provide a composition that, upon curing, has a natural tooth fluorescence.
15. The method of claim 14 , further comprising the step of:
(c) comparing the fluorescence of the composition to the fluorescence of a natural tooth.
16. The method of claim 14 , wherein the resin system comprises an ethylenically unsaturated component.
17. The method of claim 16 , wherein ethylenically unsaturated component is a (meth)acrylate.
18. The method of claim 14 , wherein the composition further comprises an initiator system.
19. The method of claim 18 , wherein the composition is photo-curable and the initiator system comprises a photoinitiator.
20. The method of claim 14 , wherein the composition further comprises a filler system.
21. The method of claim 20 , wherein the filler system comprises silica nanoparticles, zirconia nanoparticles, nanoclusters comprising silica and zirconia nanoparticles, or a combination thereof.
22. The method of claim 21 , wherein the nanoparticles have been silane treated.
23. A dental product made by hardening the composition of claim 1 .
24. The dental product of claim 23 wherein the dental product is a mill blank.