Dental restorative composite with luminescent crystals
OwnerCalvin Ostler, Hui Luinventors
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Abstract
A dental restorative composite and a method of curing the composite are disclosed in which the composite includes a polymerizable organic resin, a radiation activated initiator having an activation wavelength, an inert filler; and luminescent crystals, wherein the luminescent crystals emit radiation at a predetermined wavelength matching the initiator activation wavelength when the luminescent crystals are irradiated with radiation having a wavelength longer than the activation wavelength, the luminescent crystals being up-converting particles that result in those particles emitting radiation at a wavelength that initiates curing.
Claims22
A dental restorative composite comprising:
- a polymerizable organic resin;
- a radiation activated initiator having an activation wavelength;
- an inert filler;
- and
- luminescent crystals, wherein the luminescent crystals emit radiation at a predetermined wavelength matching the initiator activation wavelength when the luminescent crystals are irradiated with radiation having a wavelength of at least 780 nm.
A dental restorative composite comprising:
- about 15 to about 25 percent by weight of a polymerizable organic (meth)acrylate resin;
- about 0.05 to about 1.0 percent by weight of a radiation activated initiator selected from the group consisting of camphorquinone, diketone initiators, derivatives of diketone initiators, acylphosphine oxide initiators, diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide, 1-phenyl-1,2 propanedione, bis(2,4,6-trimethylbenzoyl)-phenylphospohine oxide, ethyl 2,4,6-trimethylbenzylphenyl phosphinate, and combinations thereof;
- about 56% to about 85% by weight of an inert filler;
- and
- about 1% to about 20% by weight luminescent crystals comprising a crystalline host selected from the group consisting of lanthanide fluorides, lanthanide salts, lanthanide oxides, and combinations thereof doped with a lanthanide series ion, wherein the luminescent crystals emit radiation at a predetermined wavelength matching the initiator activation wavelength when the luminescent crystals are irradiated with near-infrared radiation having a wavelength in the range of about 780nm to about 1064 nm.
Dependencies are inferred from the claim text.