New resin systems for dental restorative materials
AssigneeThe Regents of the University of Colorado, a body corporate
InventorsChristopher N. Bowman, Neil B. Cramer
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Abstract
The disclosure provides a new photopolymerizable resin system for dental restorative materials. The resin system utilizes a thiol-ene component as the reactive diluent in dimethacrylate systems. The ternary resin system comprises a thiol monomer, an ene monomer and a dimethacrylate monomer. Use of an off-stoichiometric ratio of thiol:ene functional groups in favor of excess thiols results in enhanced overall functional group conversion, improved polymer mechanical properties, and reduced shrinkage stress of the ternary system when compared to either traditional dimethacrylate or thiol-ene resin systems.
Claims25
A photopolymerizable dental restorative composition wherein the composition comprises, relative to the total weight of all polymerizable monomers:
- at least about 40% by weight of a methacrylate monomer;
- and
- at least about 10% by weight of combined weight of a thiol monomer and an ene monomer;
- and
- wherein the molar ratio of thiol functional groups from the thiol monomer relative to the ene functional groups from the ene monomer is greater than about 1:1.
A method of preparing a shaped dental prosthetic device for use in a human mouth, the method comprising:
- dispensing a photopolymerizable composition comprising, relative to the total weight of all polymerizable monomers:
- a. at least about 40% by weight of a methacrylate monomer;
- and
- b. at least about 10% by weight of combined weight of a thiol monomer and an ene monomer;
- wherein the molar ratio of thiol functional groups from the thiol monomer relative to the ene functional groups from the ene monomer is greater than about 1:1;
- c. a photoinitiator;
- and
- d. a filler;
- shaping the composition into a form of the shaped dental prosthetic device;
- and
- photopolymerizing the shaped composition.
A photopolymerizable dental restorative composition wherein the composition comprises, relative to the total weight of all polymerizable monomers:
- at least about 50% by weight of a methacrylate monomer;
- and wherein the balance of the polymerizable monomers are thiol monomers.
Dependencies are inferred from the claim text.